CN112079672A - Application of graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis - Google Patents

Application of graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis Download PDF

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Publication number
CN112079672A
CN112079672A CN202010855783.7A CN202010855783A CN112079672A CN 112079672 A CN112079672 A CN 112079672A CN 202010855783 A CN202010855783 A CN 202010855783A CN 112079672 A CN112079672 A CN 112079672A
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graphene
water
aqueous dispersion
mass
dispersion
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李虓
罗超贵
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Guangxi Qinglu New Material Technology Co ltd
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Guangxi Qinglu New Material Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/80Soil conditioners
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/40Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/50Surfactants; Emulsifiers
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/60Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00Fertilisers characterised by their form
    • C05G5/20Liquid fertilisers
    • C05G5/27Dispersions, e.g. suspensions or emulsions

Abstract

The invention provides application of a graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis, wherein the mass fraction of graphene in the graphene aqueous dispersion is 0.001-0.1%. The graphene aqueous dispersion can improve the water holding capacity of soil and provide sufficient water for crops; and can be used as a carrier of the fertilizer to slowly or controllably release the fertilizer, thereby improving the soil fertility.

Description

Application of graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis
Technical Field
The invention relates to the field of graphene application, in particular to application of a graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis.
Background
For a long time, because of excessive application of chemical fertilizers, farmland cultivated land in China is hardened, water resources are lacked, cultivated land quality is low, output is low, which is one of important factors causing land impoverishment, and in addition, due to the influence of factors which are difficult to change such as climate, terrain, soil matrix and the like, the formed soil is poor in structure, a cultivated layer is shallow, the content of effective nutrients in the soil is low, and the cultivated land soil quality is continuously deteriorated. The barren and thin paddy fields are mainly distributed in hilly areas, the organic matter content of the soil is low, and the available nutrient content of the soil of the plough layer is relatively low. The barren and thin dry land is mainly distributed in the middle and the upper part of the farmland on the hilly slope, the gravel content is high, the soil curing degree is poor, fertilizer and water are leaked, the contents of organic matters and quick-acting nutrients in the soil of a plough layer are low, the water and soil loss is serious, and the drought resistance is weak.
The world chemical fertilizers have been developed to high concentration, compound and slow/controlled release, but the chemical fertilizer production in China still takes low concentration as the main. The annual consumption of chemical fertilizers in China is up to 4100 ten thousand tons (pure nutrients), and the first chemical fertilizer in China is in the world; however, the loss of the effective components of the fertilizer in the field is serious, for example, the utilization rate of the nitrogenous fertilizer in the season is only 35-40%, the utilization rate of the phosphate fertilizer is only about 10-25%, and the loss is 15-20% lower than that of developed countries. The agricultural measures have certain effect on improving the effective utilization rate of the fertilizer, but the fundamental problem is not solved. There are fertilizers that use physical, chemical and biological means to allow the slow release of fertilizer nutrients, known as slow/controlled release fertilizers. The present coated slow-release control fertilizer developed at home and abroad can make crops absorb its nutrients well, but its price is high.
In order to cope with the continuously aggravated soil pollution caused by the rapid population growth and the industrialized development and improve the operation and planting benefits, a novel nanotechnology which is safe to develop, environment-friendly, water-retaining and fertilizer-retaining is urgently needed to improve the utilization rate of barren farmlands and the crop yield. The nanometer material particles (nanometer metal particles such as nanometer Se, nanometer Si, nanometer Cu, nanometer Al, nanometer Pd, etc.; nanometer oxide particles such as nanometer TiO2, nanometer ZnO, nanometer Fe3O4, etc.; carbon nanotubes) have the function of promoting the growth of plants when being applied to the plants, but the particle size of the nanometer material particles is in the nanometer scale, so the nanometer material particles are easy to accumulate in the plants, and have larger application risks.
Disclosure of Invention
Aiming at the defects and shortcomings of the prior art, the invention provides the application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis, and the graphene aqueous dispersion can improve the water holding capacity of soil and provide sufficient water for crops; and can be used as a carrier of the fertilizer to slowly or controllably release the fertilizer, thereby improving the soil fertility.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is characterized in that the mass fraction of graphene in the graphene aqueous dispersion is 0.001-0.1%.
Preferably, the mass fraction of graphene in the graphene aqueous dispersion is 0.002-0.08%.
The graphene aqueous dispersion also contains one or more than one of the following surfactant components: melamine, hexadecyl trimethyl ammonium chloride, sodium dodecyl benzene sulfonate and polyvinylpyrrolidone;
wherein the mass fractions of the components in the aqueous dispersion are as follows: 0.0000625% -0.1% of melamine, 0.0000625% -0.1% of hexadecyl trimethyl ammonium chloride, 0.0000625% -0.1% of sodium dodecyl benzene sulfonate and 0.0010625% -0.15% of polyvinylpyrrolidone;
preferably, the mass fractions of the components in the aqueous dispersion are as follows: 0.001 to 0.1 percent of melamine, 0.001 to 0.1 percent of hexadecyl trimethyl ammonium chloride, 0.001 to 0.1 percent of sodium dodecyl benzene sulfonate and 0.002 to 0.15 percent of polyvinylpyrrolidone.
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 1-8% of the mass of the water; then adding the surfactant with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding melamine equivalent to 0.0000625-0.1% of water mass and/or sodium dodecyl benzene sulfonate equivalent to 0.5-2% of water mass and/or polyvinylpyrrolidone equivalent to 0.5-2% of water mass and/or cetyltrimethylammonium chloride equivalent to 0.1-2% of water mass into the vermicular graphite suspension, and then grinding and dispersing;
D. and (3) placing the ground and dispersed turbid liquid into a high-pressure jet machine, carrying out jet cutting through the high-pressure jet machine to promote the separation of the graphite layers to obtain a turbid liquid of the graphene, and adding water to dilute the turbid liquid so that the mass fraction of the graphene is 0.001-0.05%.
In the step A, the microwave treatment time is 30-190s, and the power is 40-100 kw.
In the step C, grinding and dispersing are carried out by adopting a grinding and dispersing machine, and the grinding and dispersing conditions are as follows: the linear velocity is 5-20m/s, and the grinding dispersion time is 0.5-6 h.
In the step D, the high-pressure jet machine circularly sprays for 2-6 times, and the spraying pressure is set to 300-900bar each time.
The number of graphene layers in the graphene aqueous dispersion is 1-20.
The water retention, fertilizer retention and bacteriostasis treatment of the graphene aqueous dispersion on farmland comprises the following steps:
200-300cm for seed \ seedling \ plant \ tree planting position2The soil is leveled and loosened, and then the graphene aqueous dispersion is irrigated in the soil around the roots of seeds, seedlings, plants and trees according to the proportion of the 15000kg of graphene aqueous dispersion for irrigating 2000-fold soil per mu of farmland, so as to obtain the soil.
The water retention, fertilizer retention and bacteriostasis treatment of the graphene aqueous dispersion on the paddy field comprises the following steps:
before the seedlings/seeds are thrown or planted, 8000-15000kg of graphene aqueous dispersion is sprayed in each 1000 square farmland area, and then the seedlings/seeds are thrown or planted.
Preferably, the farmland is barren farmland or water and fertilizer leakage soil, and further yield increase of the existing plants is realized.
The invention has the beneficial effects that:
according to the invention, the graphene dispersion liquid is applied to the farmland, so that after the graphene enters the soil, the nano-state graphene is fully combined with the soil to form a composite system.
The oxygen-containing functional groups (carboxyl, hydroxyl and the like) on the surface of the graphene provided by the invention enable the graphene to have good hydrophilic property, and after the graphene is combined with soil, the water holding capacity of the soil can be effectively improved, the amount of farmland irrigation water can be reduced, and crops can be ensured to obtain sufficient water.
According to the invention, the graphene dispersion liquid is used, so that the adsorption performance of the soil fertilizer can be effectively improved after the graphene is combined with the soil, and meanwhile, the graphene and the fertilizer can form a material-containing synergistic fertilizer which can be used as a carrier of the fertilizer to slowly or controllably release the fertilizer, so that the soil fertility is improved, and the absorption of root system cells to the fertilizer efficiency is promoted.
After the dispersion liquid is fully combined with soil, the invention can inhibit the growth and reproduction of pathogens in the soil to a certain extent, and reduce rotten roots and diseases.
In the graphene dispersion liquid prepared by the method, the sheet diameter of graphene is larger, so that the risk caused by the fact that the nanoparticles are applied to plant growth in the prior art is avoided, the graphene can not be absorbed by plants, can not be accumulated in the plants, can not indirectly cause threat to human health, can not cause pollution to the environment, effectively solves the problem of toxicity caused by the plants and the influence on human health, and has feasibility of large-scale application.
The graphene dispersion liquid is particularly suitable for barren and thin dry land, has outstanding water retention, fertilizer retention and antibacterial effects on the barren and thin dry land, can improve the utilization rate of the barren and thin dry land, improve the crop yield, help areas such as poor mountainous areas to be depleted and become rich, and has high practical value.
In the preferred scheme of the invention, the graphene dispersion liquid is prepared by adopting a unique process, the graphene dispersion liquid prepared by the preparation process is stable in performance and can have the optimal number of graphene layers, namely 1-20 graphene layers, the number of graphene layers has the optimal performance of combining with soil, the soil fertilizer adsorption performance can be effectively improved, and the growth and reproduction of pathogens in soil can be effectively inhibited. The graphene dispersion liquid prepared by the preparation process also has an optimal oxygen-containing functional group structure, and can further improve the water holding capacity of soil after being combined with the soil.
Drawings
FIG. 1 shows the effect of experimental groups on the growth height of pepper plants;
FIG. 2 is a height comparison map of the pepper plants of each experimental group after growing for 15 days;
FIG. 3 is the effect of each experimental group on the number of fruiting plants of Capsicum annuum;
FIG. 4 is the effect of each experimental group on the growth height of pea seedling plants;
FIG. 5 shows the heading rate of rice in each test field;
FIG. 6 shows the rice setting percentage of each test field;
FIG. 7 shows the rice yield per mu for each test field;
FIG. 8 shows the weight of each test field rice in thousand grains.
Detailed Description
The present invention will be described in detail below with reference to specific examples.
Example 1
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.001%.
The graphene aqueous dispersion also contains the following surfactant components: 0.0000625% of sodium dodecyl benzene sulfonate and 0.0010625% of polyvinylpyrrolidone.
Example 2
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.05%.
The graphene aqueous dispersion also contains the following surfactant components: 0.05 percent of sodium dodecyl benzene sulfonate and 0.05 percent of polyvinylpyrrolidone.
Example 3
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.1%.
The graphene aqueous dispersion also contains the following surfactant components: 0.1 percent of sodium dodecyl benzene sulfonate and 0.15 percent of polyvinylpyrrolidone.
Example 4
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.02%.
The graphene aqueous dispersion also contains the following surfactant components: 0.03 percent of sodium dodecyl benzene sulfonate and 0.04 percent of polyvinylpyrrolidone.
Example 5
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.04%.
The graphene aqueous dispersion also contains the following surfactant components: 0.06 percent of sodium dodecyl benzene sulfonate and 0.12 percent of polyvinylpyrrolidone.
Example 6
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.007%.
The graphene aqueous dispersion also contains the following surfactant components: sodium dodecyl benzene sulfonate 0.0005% and polyvinyl pyrrolidone 0.0007%.
Example 7
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.08%.
The graphene aqueous dispersion also contains the following surfactant components: 0.002% of sodium dodecyl benzene sulfonate and 0.002% of polyvinylpyrrolidone.
Example 8
The mass fraction of graphene in the graphene aqueous dispersion is 0.001%.
Example 9
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.05%.
Example 10
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.1%.
Example 11
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.02%.
Example 12
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.04%.
Example 13
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.001%.
The graphene aqueous dispersion also contains the following surfactant components: 0.0000625% of hexadecyl trimethyl ammonium chloride, 0.0000625% of sodium dodecyl benzene sulfonate and 0.0010625% of polyvinylpyrrolidone.
Example 14
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.05%.
The graphene aqueous dispersion also contains the following surfactant components: 0.05% of hexadecyl trimethyl ammonium chloride, 0.05% of sodium dodecyl benzene sulfonate and 0.05% of polyvinylpyrrolidone.
Example 15
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.1%.
The graphene aqueous dispersion also contains the following surfactant components: 0.1% of hexadecyl trimethyl ammonium chloride, 0.1% of sodium dodecyl benzene sulfonate and 0.15% of polyvinylpyrrolidone.
Example 16
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.02%.
The graphene aqueous dispersion also contains the following surfactant components: 0.06% of hexadecyl trimethyl ammonium chloride, 0.03% of sodium dodecyl benzene sulfonate and 0.04% of polyvinylpyrrolidone.
Example 17
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.04%.
The graphene aqueous dispersion also contains the following surfactant components: 0.03% of hexadecyl trimethyl ammonium chloride, 0.06% of sodium dodecyl benzene sulfonate and 0.12% of polyvinylpyrrolidone.
Example 18
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.007%.
The graphene aqueous dispersion also contains the following surfactant components: 0.002% of hexadecyl trimethyl ammonium chloride, 0.002% of sodium dodecyl benzene sulfonate and 0.003% of polyvinylpyrrolidone.
Example 19
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.08%.
The graphene aqueous dispersion also contains the following surfactant components: 0.06% of hexadecyl trimethyl ammonium chloride, 0.002% of sodium dodecyl benzene sulfonate and 0.006% of polyvinylpyrrolidone.
Example 20
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.001%.
The graphene aqueous dispersion also contains the following surfactant components: 0.0000625% of sodium dodecyl benzene sulfonate.
Example 21
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.05%.
The graphene aqueous dispersion also contains the following surfactant components: 0.05 percent of sodium dodecyl benzene sulfonate.
Example 22
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.1%.
The graphene aqueous dispersion also contains the following surfactant components: 0.1 percent of sodium dodecyl benzene sulfonate.
Example 23
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.02%.
The graphene aqueous dispersion also contains the following surfactant components: 0.03 percent of sodium dodecyl benzene sulfonate.
Example 24
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.04%.
The graphene aqueous dispersion also contains the following surfactant components: 0.06 percent of sodium dodecyl benzene sulfonate.
Example 25
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.007%.
The graphene aqueous dispersion also contains the following surfactant components: sodium dodecyl benzene sulfonate 0.0005%.
Example 26
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.001%.
The graphene aqueous dispersion also contains the following surfactant components: and 0.0010625% of polyvinylpyrrolidone.
Example 27
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.05%.
The graphene aqueous dispersion also contains 0.05% of polyvinylpyrrolidone serving as a surfactant component.
Example 28
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.1%.
The graphene aqueous dispersion also contains the following surfactant components: 0.15 percent of polyvinylpyrrolidone.
Example 29
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.02%.
The graphene aqueous dispersion also contains the following surfactant components: 0.04 percent of polyvinylpyrrolidone.
Example 30
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.04%.
The graphene aqueous dispersion also contains the following surfactant components: 0.12 percent of polyvinylpyrrolidone.
Example 31
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.007%.
The graphene aqueous dispersion also contains the following surfactant components: 0.0007 percent of polyvinylpyrrolidone.
Example 32
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.001%.
The graphene aqueous dispersion also contains the following surfactant components: 0.0000625% of hexadecyl trimethyl ammonium chloride.
Example 33
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.05%.
The graphene aqueous dispersion also contains the following surfactant components: 0.05 percent of hexadecyl trimethyl ammonium chloride.
Example 34
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.1%.
The graphene aqueous dispersion also contains the following surfactant components: 0.1 percent of hexadecyl trimethyl ammonium chloride.
Example 35
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.02%.
The graphene aqueous dispersion also contains the following surfactant components: 0.06 percent of hexadecyl trimethyl ammonium chloride.
Example 36
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.04%.
The graphene aqueous dispersion also contains the following surfactant components: 0.03 percent of hexadecyl trimethyl ammonium chloride.
Example 37
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.007%.
The graphene aqueous dispersion also contains the following surfactant components: 0.002% of hexadecyl trimethyl ammonium chloride.
Example 38
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.001%.
The graphene aqueous dispersion also contains the following surfactant components: 0.0000625% of melamine.
Example 39
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.05%.
The graphene aqueous dispersion also contains the following surfactant components: 0.05 percent of melamine.
Example 40
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.1%.
The graphene aqueous dispersion also contains the following surfactant components: 0.1 percent of melamine.
EXAMPLE 41
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.02%.
The graphene aqueous dispersion also contains the following surfactant components: 0.06 percent of melamine.
Example 42
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.04%.
The graphene aqueous dispersion also contains the following surfactant components: 0.03 percent of melamine.
Example 43
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.007%.
The graphene aqueous dispersion also contains the following surfactant components: 0.002% of melamine.
Example 44
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.001%.
The graphene aqueous dispersion also contains the following surfactant components: 0.0000625% of melamine, 0.0000625% of hexadecyl trimethyl ammonium chloride, 0.0000625% of sodium dodecyl benzene sulfonate and 0.0010625% of polyvinylpyrrolidone.
Example 46
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.05%.
The graphene aqueous dispersion also contains the following surfactant components: 0.05% of melamine, 0.05% of hexadecyl trimethyl ammonium chloride, 0.05% of sodium dodecyl benzene sulfonate and 0.05% of polyvinylpyrrolidone.
Example 46
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.1%.
The graphene aqueous dispersion also contains the following surfactant components: 0.1% of melamine, 0.1% of hexadecyl trimethyl ammonium chloride, 0.1% of sodium dodecyl benzene sulfonate and 0.15% of polyvinylpyrrolidone.
Example 47
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.02%.
The graphene aqueous dispersion also contains the following surfactant components: 0.03% of melamine, 0.06% of hexadecyl trimethyl ammonium chloride, 0.03% of sodium dodecyl benzene sulfonate and 0.04% of polyvinylpyrrolidone.
Example 48
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.04%.
The graphene aqueous dispersion also contains the following surfactant components: 0.01% of melamine, 0.03% of hexadecyl trimethyl ammonium chloride, 0.06% of sodium dodecyl benzene sulfonate and 0.12% of polyvinylpyrrolidone.
Example 49
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.007%.
The graphene aqueous dispersion also contains the following surfactant components: 0.006% of melamine, 0.002% of hexadecyl trimethyl ammonium chloride, 0.002% of sodium dodecyl benzene sulfonate and 0.003% of polyvinylpyrrolidone.
Example 50
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.08%.
The graphene aqueous dispersion also contains the following surfactant components: 0.002% of melamine, 0.06% of hexadecyl trimethyl ammonium chloride, 0.002% of sodium dodecyl benzene sulfonate and 0.006% of polyvinylpyrrolidone.
Example 51
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.001%.
The graphene aqueous dispersion also contains the following surfactant components: 0.0000625% of sodium dodecyl benzene sulfonate and 0.0010625% of melamine.
Example 52
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.05%.
The graphene aqueous dispersion also contains the following surfactant components: 0.05 percent of sodium dodecyl benzene sulfonate and 0.05 percent of melamine.
Example 53
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.1%.
The graphene aqueous dispersion also contains the following surfactant components: 0.1 percent of sodium dodecyl benzene sulfonate and 0.15 percent of melamine.
Example 54
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.02%.
The graphene aqueous dispersion also contains the following surfactant components: 0.03 percent of sodium dodecyl benzene sulfonate and 0.04 percent of melamine.
Example 55
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.04%.
The graphene aqueous dispersion also contains the following surfactant components: 0.06 percent of sodium dodecyl benzene sulfonate and 0.12 percent of melamine.
Example 56
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.007%.
The graphene aqueous dispersion also contains the following surfactant components: sodium dodecyl benzene sulfonate 0.0005% and melamine 0.0007%.
Example 57
The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is realized, and the mass fraction of graphene in the graphene aqueous dispersion is 0.08%.
The graphene aqueous dispersion also contains the following surfactant components: 0.002% of sodium dodecyl benzene sulfonate and 0.002% of melamine.
Example 58
Based on the examples 1 to 37, the number of graphene layers in the graphene aqueous dispersion is 1 to 20.
Example 59
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 40s and the power is 40 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 1 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which accounts for 0.5 percent of the mass of water and polyvinylpyrrolidone which accounts for 0.5 percent of the mass of the water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 5m/s and the dispersion time was 0.5 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 2-6 times by the high-pressure jet machine, setting the spraying pressure at each time to be 300bar, spraying and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.001%.
Example 60
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 100s and the power is 70 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 8 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which accounts for 2 percent of the mass of water and polyvinylpyrrolidone which accounts for 2 percent of the mass of the water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 20m/s and the dispersion time was 3 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly jetting for 4 times by the high-pressure jet machine, setting the jetting pressure to be 900bar each time, jetting and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.05 percent.
Example 61
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein in the step A, the microwave treatment time is 70s, and the power is 60 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 3 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which accounts for 1 percent of the mass of water and polyvinylpyrrolidone which accounts for 1.2 percent of the mass of the water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 10m/s and the dispersion time was 1.5 h.
D. And (3) placing the dispersed turbid liquid in a high-pressure jet machine, circularly jetting for 3 times by the high-pressure jet machine, setting the jetting pressure to be 300bar, 500 bar and 900bar in sequence, jetting and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water to dilute the turbid liquid so that the mass fraction of the graphene is 0.005% to obtain the graphene.
Example 62
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 6 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which accounts for 1.5 percent of the mass of water and polyvinylpyrrolidone which accounts for 0.8 percent of the mass of the water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 3 times by the high-pressure jet machine, setting the spraying pressure to be 400, 600 and 800bar each time, carrying out jet cutting by the high-pressure jet machine, promoting separation between graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.02 percent.
Example 63
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 40s and the power is 40 kw;
B. dispersing vermicular graphite in water, wherein the addition amount of the vermicular graphite is 1 percent of the water quality, and grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 5m/s and the dispersion time was 0.5 h.
C. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 2-6 times by the high-pressure jet machine, setting the spraying pressure at each time to be 300bar, spraying and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.001%.
Example 64
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 100s and the power is 70 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 8 percent of the mass of the water, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 20m/s and the dispersion time was 3 h.
C. And D, placing the dispersed turbid liquid into a high-pressure jet machine, wherein in the step D, the high-pressure jet machine circularly sprays for 4 times, the spraying pressure is set to 900bar each time, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and water is added for dilution to ensure that the mass fraction of the graphene is 0.05 percent.
Example 65
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein in the step A, the microwave treatment time is 70s, and the power is 60 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 3 percent of the mass of the water, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 10m/s and the dispersion time was 1.5 h.
C. And D, placing the dispersed turbid liquid in a high-pressure jet machine, wherein the high-pressure jet machine circularly sprays for 3 times, the spraying pressure is set to be 300bar, 500 bar and 900bar in sequence, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of the graphite layers to obtain the turbid liquid of the graphene, and water is added for dilution to ensure that the mass fraction of the graphene is 0.005 percent, so that the graphene is obtained.
Example 66
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 6% of the mass of the water, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
C. And D, placing the dispersed turbid liquid in a high-pressure jet machine, wherein in the step D, the high-pressure jet machine circularly sprays for 3 times, the spraying pressure is set to be 400, 600 and 800bar each time, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and water is added for dilution to ensure that the mass fraction of the graphene is 0.02 percent.
Example 67
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 40s and the power is 40 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 1 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding 0.5 percent of hexadecyl trimethyl ammonium chloride equivalent to the mass of water, 0.5 percent of sodium dodecyl benzene sulfonate equivalent to the mass of water and 0.5 percent of polyvinylpyrrolidone equivalent to the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 5m/s and the dispersion time was 0.5 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 2-6 times by the high-pressure jet machine, setting the spraying pressure at each time to be 300bar, spraying and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.001%.
Example 68
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 100s and the power is 70 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 8 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding hexadecyl trimethyl ammonium chloride equivalent to 2 percent of the mass of water, sodium dodecyl benzene sulfonate equivalent to 2 percent of the mass of water and polyvinylpyrrolidone equivalent to 3 percent of the mass of water into the suspension of the vermicular graphite, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 20m/s and the dispersion time was 3 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly jetting for 4 times by the high-pressure jet machine, setting the jetting pressure to be 900bar each time, jetting and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.05 percent.
Example 69
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwaves to obtain vermicular graphite, wherein in the step A, the microwave treatment time is 70s, and the power is 60 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 3 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding hexadecyl trimethyl ammonium chloride equivalent to 1 percent of the mass of water, sodium dodecyl benzene sulfonate equivalent to 1 percent of the mass of water and polyvinylpyrrolidone equivalent to 1.2 percent of the mass of water into the suspension of the vermicular graphite, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 10m/s and the dispersion time was 1.5 h.
D. And (3) placing the dispersed turbid liquid in a high-pressure jet machine, circularly jetting for 3 times by the high-pressure jet machine, setting the jetting pressure to be 300bar, 500 bar and 900bar in sequence, jetting and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water to dilute the turbid liquid so that the mass fraction of the graphene is 0.005% to obtain the graphene.
Example 70
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 6 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding hexadecyl trimethyl ammonium chloride which is 0.6 percent of the mass of water, sodium dodecyl benzene sulfonate which is 1.5 percent of the mass of water and polyvinylpyrrolidone which is 0.8 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 3 times by the high-pressure jet machine, setting the spraying pressure to be 400, 600 and 800bar each time, carrying out jet cutting by the high-pressure jet machine, promoting separation between graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.02 percent.
Example 71
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 40s and the power is 40 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 1 percent of the mass of the water; then adding hexadecyl trimethyl ammonium chloride with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding 0.5% of hexadecyl trimethyl ammonium chloride equivalent to the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 5m/s and the dispersion time was 0.5 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 2-6 times by the high-pressure jet machine, setting the spraying pressure at each time to be 300bar, spraying and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.001%.
Example 72
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 100s and the power is 70 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 8 percent of the mass of the water; then adding hexadecyl trimethyl ammonium chloride with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding hexadecyl trimethyl ammonium chloride which is 2 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 20m/s and the dispersion time was 3 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly jetting for 4 times by the high-pressure jet machine, setting the jetting pressure to be 900bar each time, jetting and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.05 percent.
Example 73
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwaves to obtain vermicular graphite, wherein in the step A, the microwave treatment time is 70s, and the power is 60 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 3 percent of the mass of the water; then adding hexadecyl trimethyl ammonium chloride with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding hexadecyl trimethyl ammonium chloride which is 1 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 10m/s and the dispersion time was 1.5 h.
D. And (3) placing the dispersed turbid liquid in a high-pressure jet machine, circularly jetting for 3 times by the high-pressure jet machine, setting the jetting pressure to be 300bar, 500 bar and 900bar in sequence, jetting and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water to dilute the turbid liquid so that the mass fraction of the graphene is 0.005% to obtain the graphene.
Example 74
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 6 percent of the mass of the water; then adding hexadecyl trimethyl ammonium chloride with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding hexadecyl trimethyl ammonium chloride which is 0.6 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 3 times by the high-pressure jet machine, setting the spraying pressure to be 400, 600 and 800bar each time, carrying out jet cutting by the high-pressure jet machine, promoting separation between graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.02 percent.
Example 75
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 40s and the power is 40 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 1 percent of the mass of the water; then adding sodium dodecyl benzene sulfonate with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which is 0.5 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 5m/s and the dispersion time was 0.5 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 2-6 times by the high-pressure jet machine, setting the spraying pressure at each time to be 300bar, spraying and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.001%.
Example 76
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 100s and the power is 70 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 8 percent of the mass of the water; then adding sodium dodecyl benzene sulfonate with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which is 2 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 20m/s and the dispersion time was 3 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly jetting for 4 times by the high-pressure jet machine, setting the jetting pressure to be 900bar each time, jetting and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.05 percent.
Example 77
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwaves to obtain vermicular graphite, wherein in the step A, the microwave treatment time is 70s, and the power is 60 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 3 percent of the mass of the water; then adding sodium dodecyl benzene sulfonate with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which is 1 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 10m/s and the dispersion time was 1.5 h.
D. And (3) placing the dispersed turbid liquid in a high-pressure jet machine, circularly jetting for 3 times by the high-pressure jet machine, setting the jetting pressure to be 300bar, 500 bar and 900bar in sequence, jetting and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water to dilute the turbid liquid so that the mass fraction of the graphene is 0.005% to obtain the graphene.
Example 78
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 6 percent of the mass of the water; then adding sodium dodecyl benzene sulfonate with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which is 1.5 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 3 times by the high-pressure jet machine, setting the spraying pressure to be 400, 600 and 800bar each time, carrying out jet cutting by the high-pressure jet machine, promoting separation between graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.02 percent.
Example 79
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 40s and the power is 40 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 1 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding polyvinylpyrrolidone with the mass equivalent to 0.5 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 5m/s and the dispersion time was 0.5 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 2-6 times by the high-pressure jet machine, setting the spraying pressure at each time to be 300bar, spraying and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.001%.
Example 80
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 100s and the power is 70 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 8 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding polyvinylpyrrolidone which is 3 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 20m/s and the dispersion time was 3 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly jetting for 4 times by the high-pressure jet machine, setting the jetting pressure to be 900bar each time, jetting and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.05 percent.
Example 81
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwaves to obtain vermicular graphite, wherein in the step A, the microwave treatment time is 70s, and the power is 60 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 3 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding polyvinylpyrrolidone with the mass being 1.2% of that of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 10m/s and the dispersion time was 1.5 h.
D. And (3) placing the dispersed turbid liquid in a high-pressure jet machine, circularly jetting for 3 times by the high-pressure jet machine, setting the jetting pressure to be 300bar, 500 bar and 900bar in sequence, jetting and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water to dilute the turbid liquid so that the mass fraction of the graphene is 0.005% to obtain the graphene.
Example 82
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 6 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding polyvinylpyrrolidone with the mass equivalent to 0.8 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 3 times by the high-pressure jet machine, setting the spraying pressure to be 400, 600 and 800bar each time, carrying out jet cutting by the high-pressure jet machine, promoting separation between graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.02 percent.
Example 83
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 40s and the power is 40 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 1 percent of the mass of the water; then, adding melamine with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which is 0.5 percent of the mass of water and melamine which is 0.5 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 5m/s and the dispersion time was 0.5 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 2-6 times by the high-pressure jet machine, setting the spraying pressure at each time to be 300bar, spraying and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.001%.
Example 84
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 100s and the power is 70 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 8 percent of the mass of the water; then, adding melamine with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which is equivalent to 2 percent of the mass of water and melamine which is equivalent to 2 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 20m/s and the dispersion time was 3 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly jetting for 4 times by the high-pressure jet machine, setting the jetting pressure to be 900bar each time, jetting and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.05 percent.
Example 85
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein in the step A, the microwave treatment time is 70s, and the power is 60 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 3 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which accounts for 1 percent of the mass of water and melamine which accounts for 1.2 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 10m/s and the dispersion time was 1.5 h.
D. And (3) placing the dispersed turbid liquid in a high-pressure jet machine, circularly jetting for 3 times by the high-pressure jet machine, setting the jetting pressure to be 300bar, 500 bar and 900bar in sequence, jetting and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water to dilute the turbid liquid so that the mass fraction of the graphene is 0.005% to obtain the graphene.
Example 86
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 6 percent of the mass of the water; then, adding melamine with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which is 1.5 percent of the mass of water and melamine which is 0.8 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 3 times by the high-pressure jet machine, setting the spraying pressure to be 400, 600 and 800bar each time, carrying out jet cutting by the high-pressure jet machine, promoting separation between graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.02 percent.
Example 87
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 40s and the power is 40 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 1 percent of the mass of the water; then, adding melamine with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding melamine with the mass equivalent to 0.5 percent of the mass of water into the worm-like graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 5m/s and the dispersion time was 0.5 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 2-6 times by the high-pressure jet machine, setting the spraying pressure at each time to be 300bar, spraying and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.001%.
Example 88
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 100s and the power is 70 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 8 percent of the mass of the water; then, adding melamine with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding melamine with the mass being 2% of that of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 20m/s and the dispersion time was 3 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly jetting for 4 times by the high-pressure jet machine, setting the jetting pressure to be 900bar each time, jetting and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.05 percent.
Example 89
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein in the step A, the microwave treatment time is 70s, and the power is 60 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 3 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding melamine with the mass equivalent to 1.2 percent of the mass of water into the worm-like graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 10m/s and the dispersion time was 1.5 h.
D. And (3) placing the dispersed turbid liquid in a high-pressure jet machine, circularly jetting for 3 times by the high-pressure jet machine, setting the jetting pressure to be 300bar, 500 bar and 900bar in sequence, jetting and cutting by the high-pressure jet machine to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and adding water to dilute the turbid liquid so that the mass fraction of the graphene is 0.005% to obtain the graphene.
Example 90
The preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 6 percent of the mass of the water; then, adding melamine with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding melamine with the mass equivalent to 0.8 percent of the mass of water into the worm-like graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And (3) placing the dispersed turbid liquid into a high-pressure jet machine, circularly spraying for 3 times by the high-pressure jet machine, setting the spraying pressure to be 400, 600 and 800bar each time, carrying out jet cutting by the high-pressure jet machine, promoting separation between graphite layers to obtain the turbid liquid of the graphene, and adding water for dilution to ensure that the mass fraction of the graphene is 0.02 percent.
Example 91
Taking pepper planting as an example, the same experimental field is selected and divided into five groups (one group is a control group), 20 plants are planted in each group, different graphene solutions are applied to each implementation group, and the control group is implemented according to the original established planting and fertilizing steps. The planting field was selected as a mountain field around the area of rhachii county. And the subsequent irrigation and fertilization are all carried out uniformly.
1. Experimental groups:
(1) control group: and (3) conventional water and fertilizer management is adopted without using graphene aqueous dispersion.
(2) Example set 1: the graphene aqueous dispersion is used, and the mass fraction of graphene in the graphene aqueous dispersion is 0.006%. For the seed planting position of 260cm2The soil is leveled and loosened, then 1.6L of graphene water dispersion liquid is irrigated in the soil at the seed planting position, and then the same volume of water is irrigated. Then performing the same water and fertilizer management as the control group。
(3) Implementation group 2:
the preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein in the step A, the microwave treatment time is 70s, and the power is 60 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 3 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding melamine which is 1,3 percent of the mass of water and sodium dodecyl benzene sulfonate which is 1.5 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 10m/s and the dispersion time was 1.5 h.
D. And D, placing the dispersed turbid liquid in a high-pressure jet machine, wherein the high-pressure jet machine circularly sprays for 3 times, the spraying pressure is set to be 300bar, 500 bar and 900bar in sequence, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of the graphite layers to obtain the turbid liquid of the graphene, and water is added for dilution to ensure that the mass fraction of the graphene is 0.005 percent, so that the graphene is obtained.
Application: for the seed planting position of 260cm2The soil is leveled and loosened, then 1.6L of graphene water dispersion liquid is irrigated in the soil at the seed planting position, and then the same volume of water is irrigated. Then, the same water and fertilizer management as that of the control group was performed.
(4) Example group 3:
the preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 6 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding hexadecyl trimethyl ammonium chloride equivalent to 1,3 percent of the mass of water, sodium dodecyl benzene sulfonate equivalent to 1.5 percent of the mass of water and polyvinylpyrrolidone equivalent to 2 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And D, placing the dispersed turbid liquid in a high-pressure jet machine, wherein in the step D, the high-pressure jet machine circularly sprays for 3 times, the spraying pressure is set to be 400, 600 and 800bar each time, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and water is added for dilution to ensure that the mass fraction of the graphene is 0.02 percent.
Application: for the seed planting position of 260cm2The soil is leveled and loosened, then 1.6L of graphene water dispersion liquid is irrigated in the soil at the seed planting position, and then the same volume of water is irrigated. Then, the same water and fertilizer management as that of the control group was performed.
(5) Implementation group 4:
the preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 8 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which accounts for 1 percent of the mass of water and polyvinylpyrrolidone which accounts for 1.2 percent of the mass of the water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And D, placing the dispersed turbid liquid into a high-pressure jet machine, wherein in the step D, the high-pressure jet machine circularly sprays for 3 times, the spraying pressure is set to be 400, 600 and 800bar each time, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and the turbid liquid is diluted by adding water to ensure that the mass fraction of the graphene is 0.05 percent.
Application: for the seed planting position of 260cm2The soil is leveled and loosened, then 1.6L of graphene water dispersion liquid is irrigated in the soil at the seed planting position, and then the same volume of water is irrigated. Then, the same water and fertilizer management as that of the control group was performed.
2. Results of the experiment
Planting is started in 2019 at 4 and 5 months, the plant height of each group is observed after sowing for 15 days, 30 days and 64 days, and the influence of each experimental group on the growth height of pepper plants is recorded as shown in figure 1:
as can be seen from the graph in fig. 1, the average plant height of each of the working groups was higher than that of the control group 64 days after planting, the effect of the working group 2 from the 30 th day was better than that of the working group 1 and the control group, and the effect of the working group 3 and the working group 4 from the 15 th day was better than that of the working group 1, the working group 2 and the control group. In addition, fig. 2 is a photograph of a field test at 15 days of planting, in which it can also be seen that the heights of the peppers of each of the working groups are better than those of the control group.
The average fruiting number of each experimental group is shown in fig. 3, the influence of each experimental group on the fruiting number of pepper plants is shown in fig. 3, and it can be seen that the average plant height of each practical group is higher than that of the control group 64 days after planting, the effect of the practical group 2 from the 15 th day is better than that of the practical group 1 and the control group, the effect of the practical group 3 from the 15 th day is better than that of the practical group 1, the practical group 2 and the control group, and the effect of the practical group 4 from the 15 th day is better than that of the practical group 1, the practical group 2, the practical group 3 and the control group.
Example 92
Taking the planting of the pea seedlings as an example, the same experimental field is selected and divided into five groups (one group is a control group), 20 plants are arranged in each group, different graphene solutions are applied to each implementation group, and the control group is implemented according to the original established planting and fertilizing steps. The planting field was selected as a mountain field around the area of rhachii county. And the subsequent irrigation and fertilization are all carried out uniformly.
1. Experimental groups:
(1) control group: and (3) conventional water and fertilizer management is adopted without using graphene aqueous dispersion.
(2) Example set 1: the graphene aqueous dispersion is used, and the mass fraction of graphene in the graphene aqueous dispersion is 0.006%. For the seed planting position of 260cm2The soil is leveled and loosened, then 1.6L of graphene water dispersion liquid is irrigated in the soil at the seed planting position, and then the same volume of water is irrigated. Then, the same water and fertilizer management as that of the control group was performed.
(3) Implementation group 2:
the preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein in the step A, the microwave treatment time is 70s, and the power is 60 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 3 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding melamine which is 1,3 percent of the mass of water and sodium dodecyl benzene sulfonate which is 1.5 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 10m/s and the dispersion time was 1.5 h.
D. And D, placing the dispersed turbid liquid in a high-pressure jet machine, wherein the high-pressure jet machine circularly sprays for 3 times, the spraying pressure is set to be 300bar, 500 bar and 900bar in sequence, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of the graphite layers to obtain the turbid liquid of the graphene, and water is added for dilution to ensure that the mass fraction of the graphene is 0.005 percent, so that the graphene is obtained.
Application: for the seed planting position of 260cm2The soil is leveled and loosened, then 1.6L of graphene water dispersion liquid is irrigated in the soil at the seed planting position, and then the same volume of water is irrigated. Then, the same water and fertilizer management as that of the control group was performed.
(4) Example group 3:
the preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 6 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding hexadecyl trimethyl ammonium chloride equivalent to 1,3 percent of the mass of water, sodium dodecyl benzene sulfonate equivalent to 1.5 percent of the mass of water and polyvinylpyrrolidone equivalent to 2 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And D, placing the dispersed turbid liquid in a high-pressure jet machine, wherein in the step D, the high-pressure jet machine circularly sprays for 3 times, the spraying pressure is set to be 400, 600 and 800bar each time, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and water is added for dilution to ensure that the mass fraction of the graphene is 0.02 percent.
Application: for the seed planting position of 260cm2The soil is leveled and loosened, then 1.6L of graphene water dispersion liquid is irrigated in the soil at the seed planting position, and then the same volume of water is irrigated. Then, the same water and fertilizer management as that of the control group was performed.
(5) Implementation group 4:
the preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 8 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which accounts for 1 percent of the mass of water and polyvinylpyrrolidone which accounts for 1.2 percent of the mass of the water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And D, placing the dispersed turbid liquid into a high-pressure jet machine, wherein in the step D, the high-pressure jet machine circularly sprays for 3 times, the spraying pressure is set to be 400, 600 and 800bar each time, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and the turbid liquid is diluted by adding water to ensure that the mass fraction of the graphene is 0.05 percent.
Application: for the seed planting position of 260cm2The soil is leveled and loosened, then 1.6L of graphene water dispersion liquid is irrigated in the soil at the seed planting position, and then the same volume of water is irrigated. Then, the same water and fertilizer management as that of the control group was performed.
2. Results of the experiment
After 19 days of sowing, the plant height of each group was observed and the effect of each experimental group on the pea seedling plant growth height was recorded as shown in fig. 4:
as can be seen from the graph in fig. 4, the average plant height of each of the examples was higher than that of the control group 19 days after planting, and each of the examples exhibited lodging resistance; the mean plant height and the lodging resistance of the working groups 3, 4 and 5 were superior to those of the working group 1 and the control group.
The average fruiting number of each experimental group is shown in fig. 3, the influence of each experimental group on the fruiting number of pepper plants is shown in fig. 3, and it can be seen that the average plant height of each practical group is higher than that of the control group 64 days after planting, the effect of the practical group 2 from the 15 th day is better than that of the practical group 1 and the control group, the effect of the practical group 3 from the 15 th day is better than that of the practical group 1, the practical group 2 and the control group, and the effect of the practical group 4 from the 15 th day is better than that of the practical group 1, the practical group 2, the practical group 3 and the control group.
Example 93
Taking the planting of the sowthistle as an example, four test fields (one of which is a control group) are selected, and 80 plants are planted in each test field. Graphene solutions with different concentrations are applied to each implementation group, and the control group is implemented according to the original established planting and fertilizing steps. The planting field was selected as a mountain field around the area of rhachii county. And the subsequent irrigation and fertilization are all carried out uniformly.
Experimental group
(1) Control group: and (3) conventional water and fertilizer management is adopted without using graphene aqueous dispersion.
(2) Example set 1:
the preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein in the step A, the microwave treatment time is 70s, and the power is 60 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 3 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding melamine which is 1.3 percent of the mass of water and sodium dodecyl benzene sulfonate which is 1.5 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 10m/s and the dispersion time was 1.5 h.
D. And D, placing the dispersed turbid liquid in a high-pressure jet machine, wherein the high-pressure jet machine circularly sprays for 3 times, the spraying pressure is set to be 300bar, 500 bar and 900bar in sequence, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of the graphite layers to obtain the turbid liquid of the graphene, and water is added for dilution to ensure that the mass fraction of the graphene is 0.005 percent, so that the graphene is obtained.
Application: for the seed planting position of 260cm2The soil is leveled and loosened, then 1.6L of graphene water dispersion liquid is irrigated in the soil at the seed planting position, and then the same volume of water is irrigated. Then, the same water and fertilizer management as that of the control group was performed.
(3) Implementation group 2:
the preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 6 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding hexadecyl trimethyl ammonium chloride equivalent to 1,3 percent of the mass of water, sodium dodecyl benzene sulfonate equivalent to 1.5 percent of the mass of water and polyvinylpyrrolidone equivalent to 2 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And D, placing the dispersed turbid liquid in a high-pressure jet machine, wherein in the step D, the high-pressure jet machine circularly sprays for 3 times, the spraying pressure is set to be 400, 600 and 800bar each time, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and water is added for dilution to ensure that the mass fraction of the graphene is 0.02 percent.
Application: for the seed planting position of 260cm2The soil is leveled and loosened, then 1.6L of graphene water dispersion liquid is irrigated in the soil at the seed planting position, and then the same volume of water is irrigated. Then, the same water and fertilizer management as that of the control group was performed.
(4) Example group 3:
the preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 8 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which accounts for 1 percent of the mass of water and polyvinylpyrrolidone which accounts for 1.2 percent of the mass of the water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And D, placing the dispersed turbid liquid into a high-pressure jet machine, wherein in the step D, the high-pressure jet machine circularly sprays for 3 times, the spraying pressure is set to be 400, 600 and 800bar each time, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and the turbid liquid is diluted by adding water to ensure that the mass fraction of the graphene is 0.05 percent.
Application: for the seed planting position of 260cm2The soil is leveled and loosened, then 1.6L of graphene water dispersion liquid is irrigated in the soil at the seed planting position, and then the same volume of water is irrigated. Then, the same water and fertilizer management as that of the control group was performed.
2. Results of the experiment
The average plant height and average number of leaves per plant were observed for each test field under the same fertilization conditions, growth time and are reported as follows:
effect comparison table:
control group EXAMPLE 1 group 1 EXAMPLE 2 group EXAMPLE 3 group
Average plant height (cm) 23 33 40 34
Average number of leaves per plant 18 23 24 22
And (4) experimental conclusion:
it can be seen that the graphene water dispersion liquid is used for observing the average plant height and the average leaf number of each group in the same fertilization condition and growth time by retaining water, fertilizer and bacteria of farmlands, and each implementation group is superior to a control group.
Example 94
Taking rice planting as an example, four planting test plots (one of which is a control group) are selected, and each test plot is 200 squares. Graphene solutions with different concentrations are applied to each implementation group, and the control group is implemented according to the original established planting and fertilizing steps. The planting field is selected as a paddy field around the guest city xingbing area. And the subsequent irrigation and fertilization are all carried out uniformly.
1. Experimental groups:
(1) control group: and (3) conventional water and fertilizer management is adopted without using graphene aqueous dispersion.
(1) Control group: and (3) conventional water and fertilizer management is adopted without using graphene aqueous dispersion.
(2) Example set 1:
the preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein in the step A, the microwave treatment time is 70s, and the power is 60 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 3 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding melamine which is 1,3 percent of the mass of water and sodium dodecyl benzene sulfonate which is 1.5 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 10m/s and the dispersion time was 1.5 h.
D. And D, placing the dispersed turbid liquid in a high-pressure jet machine, wherein the high-pressure jet machine circularly sprays for 3 times, the spraying pressure is set to be 300bar, 500 bar and 900bar in sequence, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of the graphite layers to obtain the turbid liquid of the graphene, and water is added for dilution to ensure that the mass fraction of the graphene is 0.005 percent, so that the graphene is obtained.
Application: for seedling planting position 260cm2The soil is leveled and loosened, then 1.6L of graphene aqueous dispersion is irrigated to the soil at the seedling planting position, and then the same volume of water is irrigated. Then, the same water and fertilizer management as that of the control group was performed.
(3) Implementation group 2:
the preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite into water, wherein the adding amount of the vermicular graphite is 6 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding hexadecyl trimethyl ammonium chloride equivalent to 1,3 percent of the mass of water, sodium dodecyl benzene sulfonate equivalent to 1.5 percent of the mass of water and polyvinylpyrrolidone equivalent to 2 percent of the mass of water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And D, placing the dispersed turbid liquid in a high-pressure jet machine, wherein in the step D, the high-pressure jet machine circularly sprays for 3 times, the spraying pressure is set to be 400, 600 and 800bar each time, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and water is added for dilution to ensure that the mass fraction of the graphene is 0.02 percent.
Application: for seedling planting position 260cm2The soil is leveled and loosened, then 1.6L of graphene aqueous dispersion is irrigated to the soil at the seedling planting position, and then the same volume of water is irrigated. Then, the same water and fertilizer management as that of the control group was performed.
(4) Example group 3:
the preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite, wherein the microwave treatment time is 90s, and the power is 50 kw;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 8 percent of the mass of the water; then adding polyvinylpyrrolidone with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding sodium dodecyl benzene sulfonate which accounts for 1 percent of the mass of water and polyvinylpyrrolidone which accounts for 1.2 percent of the mass of the water into the vermicular graphite suspension, and then grinding and dispersing; grinding dispersion is carried out by adopting a grinding dispersion machine, and the grinding dispersion conditions are as follows: the linear velocity was 11m/s and the dispersion time was 2 h.
D. And D, placing the dispersed turbid liquid into a high-pressure jet machine, wherein in the step D, the high-pressure jet machine circularly sprays for 3 times, the spraying pressure is set to be 400, 600 and 800bar each time, the high-pressure jet machine sprays and cuts the turbid liquid to promote the separation of graphite layers to obtain the turbid liquid of the graphene, and the turbid liquid is diluted by adding water to ensure that the mass fraction of the graphene is 0.05 percent.
Application: for seedling planting position 260cm2The soil is leveled and loosened, then 1.6L of graphene aqueous dispersion is irrigated to the soil at the seedling planting position, and thenIrrigating the same volume of water. Then, the same water and fertilizer management as that of the control group was performed.
2. Results of the experiment
After 76 days of rice transplanting, the rice heading rate of each test field is counted, the result is shown in figure 5, the rice heading rate of each test field is superior to that of the control group, the implementation group 2 is superior to that of the control group, and the implementation group 3 is superior to that of the implementation group 2.
After the rice is transplanted for 102 days, the maturing rate of the rice in each test field is counted, the result is shown in fig. 6, the maturing rate of the rice in each test field is superior to that of the control group, the implementation group 2 is superior to that of the control group, and the implementation group 3 is equal to that of the implementation group 2.
After the rice is harvested, the rice acre yield of each test field is counted, the result is shown in figure 7, the rice acre yield of each test field is equal, and the rice acre yield of each implementation group is better than that of the control group.
After the rice is harvested, the weight of each test field rice thousand grains is counted, the result is shown in figure 8, the weight of each test field rice thousand grains is equal, the yield per mu between each implementation group is equal, and the results are all superior to those of the control group.
From the above examples, it can be seen that, by adopting the method of the present invention, under normal planting and fertilizing conditions, since the graphene material has a large specific surface area and strong adsorbability, it is easy to adsorb nutrients and moisture in the soil solution to form a carrier of fertilizer and water, and slow or controlled release is performed to reduce loss of fertilizer and moisture, so that it is easier to be absorbed by plants and promote plant generation. Meanwhile, the graphene has a strong antibacterial function, can reduce the disease damage of crops, reduces lodging and improves the survival rate.
The specific application ways of the invention are many, the ratio of graphene to water can be combined in any range, and the above is only a preferred embodiment of the invention. It should be noted that the above examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications can be made without departing from the principles of the invention and these modifications are to be considered within the scope of the invention.

Claims (10)

1. The application of the graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis is characterized in that: the mass fraction of graphene in the graphene aqueous dispersion is 0.001-0.1%.
2. Use according to claim 1, characterized in that:
the graphene aqueous dispersion also contains one or more than one of the following surfactant components: melamine, hexadecyl trimethyl ammonium chloride, sodium dodecyl benzene sulfonate and polyvinylpyrrolidone;
wherein the mass fractions of the components in the aqueous dispersion are as follows: 0.0000625-0.1% of melamine, 0.0000625-0.1% of hexadecyl trimethyl ammonium chloride, 0.0000625-0.1% of sodium dodecyl benzene sulfonate and 0.0010625-0.15% of polyvinylpyrrolidone.
3. The use according to claim 2, wherein the preparation method of the graphene aqueous dispersion comprises the following steps:
A. puffing expandable graphite by microwave to obtain vermicular graphite;
B. dispersing vermicular graphite in water, wherein the adding amount of the vermicular graphite is 1-8% of the mass of the water; then adding the surfactant with the same mass, and stirring to obtain a worm-like graphite suspension;
C. adding melamine equivalent to 0.0000625-0.1% of water mass and/or sodium dodecyl benzene sulfonate equivalent to 0.5-2% of water mass and/or polyvinylpyrrolidone equivalent to 0.5-2% of water mass and/or cetyltrimethylammonium chloride equivalent to 0.1-2% of water mass into the vermicular graphite suspension, and then grinding and dispersing;
D. and (3) placing the ground and dispersed turbid liquid into a high-pressure jet machine, carrying out jet cutting through the high-pressure jet machine to promote the separation of the graphite layers to obtain a turbid liquid of the graphene, and adding water to dilute the turbid liquid so that the mass fraction of the graphene is 0.001-0.05%.
4. Use according to claim 2, characterized in that: in the step A, the microwave treatment time is 30-190s, and the power is 40-100 kw.
5. Use according to claim 2, characterized in that: in the step C, grinding and dispersing are carried out by adopting a grinding and dispersing machine, and the grinding and dispersing conditions are as follows: the linear velocity is 5-20m/s, and the grinding dispersion time is 0.5-6 h.
6. Use according to claim 2, characterized in that: in the step D, the high-pressure jet machine circularly sprays for 2-6 times, and the spraying pressure is set to 300-900bar each time.
7. Use according to claim 1, characterized in that: the number of graphene layers in the graphene aqueous dispersion is 1-20.
8. The use of the graphene aqueous dispersion as claimed in claim 1, wherein the water retention, fertilizer retention and bacteriostasis treatment of the graphene aqueous dispersion on farmland comprises the following steps:
200-300cm for seed \ seedling \ plant \ tree planting position2The soil is leveled and loosened, and then the graphene aqueous dispersion is irrigated in the soil around the roots of seeds, seedlings, plants and trees according to the proportion of the 15000kg of graphene aqueous dispersion for irrigating 2000-fold soil per mu of farmland, so as to obtain the soil.
9. Use according to claim 1, characterized in that: the water retention, fertilizer retention and bacteriostasis treatment of the graphene aqueous dispersion on the paddy field comprises the following steps:
before the seedlings/seeds are thrown or planted, 8000-15000kg of graphene aqueous dispersion is sprayed in each 1000 square farmland area, and then the seedlings/seeds are thrown or planted.
10. Use according to claim 1, characterized in that: the farmland soil is barren soil or water and fertilizer leaking soil.
CN202010855783.7A 2020-08-24 2020-08-24 Application of graphene aqueous dispersion in farmland water retention, fertilizer retention and bacteriostasis Pending CN112079672A (en)

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