CN110999595A - Hydrogel seed and preparation method thereof - Google Patents

Hydrogel seed and preparation method thereof Download PDF

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Publication number
CN110999595A
CN110999595A CN201911414028.9A CN201911414028A CN110999595A CN 110999595 A CN110999595 A CN 110999595A CN 201911414028 A CN201911414028 A CN 201911414028A CN 110999595 A CN110999595 A CN 110999595A
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hydrogel
photocatalytic
seed
photocatalytic material
treatment
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赵梓俨
李伟
赵梓权
万文超
刘劲鹏
李鹏辉
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
    • A01C1/06—Coating or dressing seed
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Plant Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Pretreatment Of Seeds And Plants (AREA)

Abstract

The embodiment of the invention discloses a hydrogel seed and a preparation method thereof. The hydrogel seed comprises a plant seed and a gel protective layer covering the surface of the plant seed, wherein the gel protective layer at least comprises the following components: the pretreated two-dimensional layered photocatalytic material; nano boron nitride balls, 0.01-0.5g/100 ml; 5-7g/100ml of nutrient and/or auxiliary agent, 20-30% of auxiliary agent and water. The embodiment of the invention has obviously improved antibacterial property, self-repairability and long-range water retention property.

Description

Hydrogel seed and preparation method thereof
Technical Field
The invention relates to the technical field of agricultural planting, in particular to a hydrogel seed and a preparation method thereof.
Background
In agricultural planting, seed plants, root crops and the like are easily affected by plant diseases and insect pests at the early germination and soil breaking stage. The seeds to be sown are placed in the hydrogel protective layer, so that the effect of effectively protecting the seeds against plant diseases and insect pests can be achieved, nutrients and water required by plant growth can be supplied, the germination rate of the plant seeds is improved, and the normal growth of the plants is guaranteed.
However, in the process of implementing the present invention, the inventor finds that the hydrogel seeds of the prior art have poor antibacterial property, and the hydrogel protective layer is very easy to damage under the severe environment or weather conditions of low temperature, long range and the like, so that water and nutrient substances are lost.
Disclosure of Invention
The invention aims to provide a novel hydrogel seed and a preparation method thereof so as to obtain remarkably high antibacterial property, self-repairing property and long-range water retention property.
In order to achieve the purpose, the invention adopts the following technical scheme:
the hydrogel seed comprises a plant seed and a gel protective layer covering the surface of the plant seed, wherein the gel protective layer at least comprises the following components:
the mass concentration of the pretreated two-dimensional layered photocatalytic material is not more than 15%;
nano boron nitride balls, 0.01-0.5g/100 ml;
5-7g/100ml of nutrient and/or auxiliary agent, wherein the volume fraction of the auxiliary agent is 20% -30%;
and water.
In some possible embodiments, the pretreatment of the two-dimensional layered photocatalytic material comprises at least one of ultrasonic treatment, mechanical stirring treatment and ball milling treatment.
In some possible embodiments, the nano boron nitride spheres are replaced with:
0.05-0.1g/100ml of trivalent ferric salt; alternatively, the first and second electrodes may be,
0.1-0.5g/100ml of glycerol and nano boron nitride ball mixture.
In some possible embodiments, the two-dimensional layered photocatalytic material comprises at least one of a nano non-metallic photocatalytic material, a non-metallic doped photocatalytic material, and a non-metallic composite photocatalytic material; and/or the presence of a gas in the gas,
the auxiliary agent comprises at least one of sodium alginate/propylene glycol mixture, agar, glycerol, gelatin, starch and cellulose; and/or the presence of a gas in the gas,
the nutrient is selected from inorganic substances of nitrogen, phosphorus, potassium, sulfur, calcium and magnesium; at least one of amino acids, polysaccharide organic substances and micronutrients.
In some possible embodiments, the nano non-metallic photocatalytic material includes carbon nitride and boron nitride; and/or the like, and/or,
the non-metal doped photocatalytic material comprises a carbon doped photocatalytic material and a nitrogen doped photocatalytic material; and/or the like, and/or,
the non-metal composite photocatalytic material comprises C3N4Graphene composition or C3N4/SiO2A composition is provided.
A method of preparing a hydrogel seed, comprising:
carrying out at least one of stripping treatment of ultrasonic treatment, mechanical stirring treatment and ball milling treatment on the two-dimensional layered photocatalytic material to prepare a photocatalytic solution with the mass concentration of the two-dimensional layered photocatalytic material not more than 15%;
adding 0.01-0.5g/100ml of nano boron nitride balls, water, a nutrient and/or an auxiliary agent into the photocatalytic solution;
preparing a photocatalytic gel from the photocatalytic solution added with the nano boron nitride spheres, water, a nutrient and/or an auxiliary agent;
and coating the photocatalytic gel on the surface of the plant seed to form a gel protective layer.
In some possible embodiments, the nano boron nitride spheres are replaced with:
0.05-0.1g/100ml of trivalent ferric salt; or
0.1-0.5g/100ml of glycerol and nano boron nitride ball mixture.
In some possible embodiments, the photocatalytic solution is subjected to an acid-base conditioning treatment to a pH of 6 to 8.5.
In some possible embodiments, the added nutrient in the photocatalytic solution is 5-7g/100ml, the volume fraction of the auxiliary agent is 20% -30%, the mechanical stirring speed is 100-.
In some possible embodiments, the seeds are sterilized prior to coating the photocatalytic gel on the surface of the plant seeds to form the gel protective layer.
According to the embodiment of the invention, the two-dimensional layered photocatalytic material and the nano boron nitride spheres/ferric iron salt are added into the hydrogel seeds, so that the antibacterial property, the self-repairing property and the long-range water retention property are obviously improved, the growth of the seeds in extreme living environments such as low temperature and drought is ensured, the environmental climate adaptability of the hydrogel seeds is expanded, and the hydrogel seeds can be widely applied to the agricultural fields such as water and soil moisture retention, soilless culture, plant growth and seed sowing and the garden fields such as seed sowing, bud protection and nutrition protective agents.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail by referring to the following examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The numerical values set forth in the examples of the present invention are approximations, not necessarily values. All values within the error range may be included without limiting to the specific values disclosed in the embodiments of the present invention, where the error or experimental conditions allow.
The numerical ranges disclosed in the examples of the present invention are intended to indicate the relative amounts of the components in the mixture and the ranges of temperatures or other parameters recited in the other method examples. One or more numerical points within the numerical range are taken under appropriate conditions.
The photocatalytic material has photocatalytic activity, and can generate a large amount of oxidizing substances under the excitation of light so as to realize the functions of antibiosis and the like.
An example of the hydrogel seed provided in this example is described in detail below. The embodiment mainly comprises plant seeds and a gel protective layer covering the surfaces of the plant seeds, wherein the gel protective layer at least comprises the following components:
the mass concentration of the pretreated two-dimensional layered photocatalytic material is not more than 15%;
nano boron nitride balls, 0.01-0.5g/100 ml;
5-7g/100ml of nutrient; and/or an auxiliary agent, the volume fraction is 20% -30%;
and water.
In some possible embodiments, the nano boron nitride spheres may be further replaced with:
0.05g/100ml of trivalent ferric salt; or
Glycerin and nano boron nitride ball mixture, 0.5g/100 ml.
In some possible embodiments, the pretreatment of the two-dimensional layered photocatalytic material comprises at least one of ultrasonic treatment, mechanical stirring treatment and ball milling treatment.
In some possible embodiments, the two-dimensional layered photocatalytic material may include one or more of a nano non-metallic photocatalytic material, a non-metallic doped photocatalytic material, and a non-metallic composite photocatalytic material.
In some possible embodiments, the nano non-metallic photocatalytic material includes carbon nitride and boron nitride; and/or
The non-metal doped photocatalytic material comprises a carbon doped photocatalytic material and a nitrogen doped photocatalytic material; and/or
The non-metal composite photocatalytic material comprises C3N4Graphene or C3N4/SiO2。
In some possible embodiments, the adjuvant comprises sodium alginate and propylene glycol in a volume ratio of 2: 5.
in some possible embodiments, the adjuvant comprises at least one of agar, glycerol, gelatin, starch, cellulose.
In some possible embodiments, the nutrient comprises one or more of inorganic substances such as nitrogen, phosphorus, potassium, sulfur, calcium, magnesium, organic substances such as amino acids and polysaccharides, and trace nutrients, and the content of the nutrient is not more than 7g per 100 ml.
The plant seeds suitable for the embodiment of the invention can be:
1. grain and oil crops, such as: wheat, millet, sorghum, rice, soybean, black bean, mung bean, small red bean seed and the like;
2. forest tree seeds, such as: apple, pear, peach, apricot, persimmon, jujube, hawthorn, grape, kiwi, cherry, pomegranate, walnut, Chinese chestnut, chinaberry, ailanthus altissima, phoenix tree, pine, goldenrain tree, Chinese honeylocust, etc.;
3. vegetable seeds, such as: seeds of hot pepper, eggplant, tomato, kidney bean, cabbage, radish, rape, etc
4. Weed seeds, such as: seed of green bristlegrass herb, tarragon, plantain seed, cyperus rotundus, dandelion and the like;
5. root tubers, such as: seeds of sweet potato, purple potato, sweet potato, fleece-flower root, cassava, beet and the like;
6. seeds of floral plants, such as: jasmine, aglaia odorata, gardenia, chrysanthemum, rhododendron, camellia and other seeds;
7. cutting plant seeds, such as: willow, poplar, elm, locust, metasequoia, ginkgo and the like.
The following describes in detail a method for preparing hydrogel seeds provided by an embodiment of the present invention, the method comprising the steps of:
110. and (3) after the two-dimensional layered photocatalytic material is subjected to two-dimensional layered material stripping treatment, preparing a photocatalytic solution with the mass concentration not more than 15%.
The two-dimensional layered material stripping treatment is carried out on the two-dimensional layered photocatalytic material, so that on one hand, the dispersibility of the photocatalytic material can be increased, the stable solution can be formed, and the effect of the photocatalytic material can be ensured; on the other hand, the method can also ensure that enough fine particles are obtained, so that dialysis treatment is not needed, and the preparation time is shortened.
In some possible embodiments, the two-dimensional layered material may be subjected to a peeling treatment by:
one or more of ultrasonic treatment, mechanical stirring treatment and ball milling treatment.
In some possible embodiments, the photocatalytic solution is subjected to an acid-base blending treatment to a pH of 6 to 8.5 to prevent corrosion damage to the seeds.
The acid used in the acid treatment may be a medium strong acid including sulfuric acid, hydrochloric acid, nitric acid, acetic acid, and the like,
the base used in the alkali treatment may be a moderately strong base including sodium hydroxide, potassium hydroxide, and the like.
The ultrasonic frequency of ultrasonic treatment is 25Hz-80Hz,
the rotating speed of the mechanical stirring is 100-3500r/min,
the ball milling speed of the ball milling treatment is 2000-10000 r/min.
The person skilled in the art can adjust or select the appropriate material solution concentration according to the needs of the actual situation, and such concentration adjustment is usually based on known adjustment principles or experience.
120. Adding nano boron nitride balls, water, a nutrient and/or an auxiliary agent into the photocatalytic solution.
In some possible embodiments, the method specifically includes:
adding a nutrient with the content of 5-7g of nutrient substances in each 100ml of the photocatalytic solution, and mechanically stirring for 0.5-1.5 hours at the rotating speed of 100-;
adding nanometer boron nitride balls and water into the photocatalytic solution;
adding auxiliary agent with volume fraction of 20-30%.
In some embodiments, the nutrient, functional substance, and adjuvant are added to the photocatalytic hydrogel and stirred to allow for thorough mixing and shaping. For the stirring operation, at least one of ultrasonic treatment, mechanical stirring treatment and ball milling treatment may be preferably selected.
The specific required stirring treatment time can be determined or adjusted according to actual conditions, and finally the obtained photocatalytic hydrogel is obtained.
130. And preparing the photocatalytic solution added with the nano boron nitride spheres, water, nutrient and/or auxiliary agent into photocatalytic gel.
140. And coating the photocatalytic gel on the surface of the plant seed to form a gel protective layer. In some possible embodiments, the plant species may be disinfected by soaking, fumigation, or autoclaving before being coated with the photocatalytic gel on its surface.
Wherein: the solution for soaking and disinfection can adopt 50-75% ethanol solution and 5-10% sodium hypochlorite solution; the solution for fumigation can adopt 5-8% acetic acid solution and sterile water; the temperature of high-temperature sterilization can be set to be 100-120 ℃.
In some possible embodiments, the nano boron nitride spheres may be replaced with:
0.05g/100ml of trivalent ferric salt; or
Glycerin and nano boron nitride ball mixture, 0.5g/100 ml.
According to the embodiment of the invention, the two-dimensional layered photocatalytic material and the nano boron nitride spheres/ferric iron salt are added into the hydrogel seeds, so that the antibacterial property, the self-repairing property and the long-range water retention property are obviously improved, the growth of the seeds in extreme living environments such as low temperature and drought is ensured, and the environmental climate adaptability of the hydrogel seeds is expanded. The embodiment of the invention is green and nontoxic, has simple preparation process, low production cost and high production efficiency, and can be widely applied to the agricultural fields of water and soil moisture preservation, soilless culture, plant growth, seed sowing and the like and the garden fields of seed sowing, sprout protection, nutrition protective agents and the like.
Several specific examples are provided below for detailed explanation based on the hydrogel seed and the preparation method thereof provided by the present invention.
Example 1:
1) c is to be3N4The photocatalysis material is carried out acidification pretreatment to realize the stripping of the two-dimensional layered material.
In some embodiments, the treatment can be carried out by using concentrated sulfuric acid, after the acidification time is 12 hours, the filtration and washing are carried out for multiple times until the solution becomes weak acid or neutral (pH value is 6-7), and the solution is subjected to ultrasonic treatment for 2 hours, wherein the ultrasonic frequency is 40Hz, so as to obtain a photocatalytic solution;
2) adding nutrient substances containing inorganic substances such as nitrogen, phosphorus and the like and organic substances such as amino acid, polysaccharide and the like into the photocatalytic solution, wherein the content of the nutrient substances is 7g in each 100ml of the photocatalytic solution, mechanically stirring the photocatalytic solution for 0.5 hour, and rotating speed is 2000 r/min;
3) adding a functional substance and an auxiliary agent into the solution 2), wherein the auxiliary agent comprises 30% of glycerol and agar in a volume ratio of 10:1, the functional substance is in a micro-scale level, the addition amount of each 100ml is 0.05g, the functional substance comprises a ferric iron salt, water is added for ball milling and mixing, the ball milling time is 0.5 hour, and the rotating speed is 5000r/min, so that the photocatalytic hydrogel is obtained, and has good water retention property, antibacterial property and frost resistance;
4) soaking wheat seeds in a 50% ethanol solution for 1 minute for disinfection, then soaking the wheat seeds in a 5% sodium hypochlorite solution for 2 minutes, finally washing the wheat seeds with sterile water for multiple times, and then quickly drying the wheat seeds at 80 ℃;
5) adding the plant seeds into the photocatalytic hydrogel to obtain hydrogel wheat seeds.
The hydrogel wheat seeds prepared by the embodiment can be sown in a spraying mode.
The hydrogel wheat seeds prepared by the embodiment of the invention have the antibacterial performance, and the characteristics of nutrient substance and water retention of the formed hydrogel, so that the hydrogel wheat seeds have the potential of wide application, and the sowing conditions of most seeds are met, wherein the hydrogel has the self-repairing capability due to the addition of iron ions, and the antibacterial property of the hydrogel is improved by adding the photocatalytic material. The hydrogel seed prepared by the method has good antibacterial performance and self-repairing performance, has a protection function, prevents seed sowing from suffering from diseases and insect pests, can be used as a plant protection and antibacterial product, and is applied to the agricultural fields of water and soil moisture retention, soilless culture, plant growth, seed sowing and the like, and the garden fields of seed sowing, sprout protection, nutrition protection and the like.
Example 2:
1) c is to be3N4Carrying out alkalization pretreatment on the graphene photocatalytic material to realize stripping of the two-dimensional layered material, treating the two-dimensional layered material by using a sodium hydroxide solution for 6 hours, then carrying out filtration and washing for multiple times until the solution becomes neutral (the pH value is 7-8.5), filtering and drying the solution, then preparing the solution again, carrying out ultrasonic treatment for 1 hour, and obtaining a photocatalytic solution, wherein the ultrasonic frequency is 70 Hz;
2) adding nutrient substances containing inorganic substances such as nitrogen, phosphorus and the like and organic substances such as amino acid, polysaccharide and the like into the photocatalytic solution, wherein the content of the nutrient substances is 5g in each 100ml of the photocatalytic solution, mechanically stirring the photocatalytic solution for 0.5 hour, and rotating speed is 2000 r/min;
3) adding a functional substance and an auxiliary agent into the solution 2), wherein the volume fraction of the auxiliary agent is 20%, and the auxiliary agent comprises sodium alginate and propylene glycol, and the volume ratio of the sodium alginate to the propylene glycol is 2: 5, the functional substance is in a micro-scale, the adding amount of each 100ml is 0.01g, the functional substance comprises nano boron nitride balls, water is added for ball milling and mixing, the ball milling time is 1 hour, the rotating speed is 5000r/min, and the photocatalytic hydrogel is obtained and has excellent antibacterial property, low-temperature self-repairing property and long-range water retention property;
4) fumigating and sterilizing the potato root tuber of the plant seeds, which specifically comprises the following steps: fumigating potato tuber in 5% acetic acid solution for 5 min, washing with sterile water for several times, and rapidly drying at 80 deg.C;
5) the photocatalytic hydrogel is uniformly coated on the potato root tubers to realize effective coating, so that the hydrogel potato root tubers are obtained.
The hydrogel potato root tubers prepared in this example were sown by drill seeding.
The hydrogel potato tuber prepared by the embodiment of the invention has the antibacterial property, and the characteristics of nutrient substance and water retention of the formed hydrogel, has the potential of wide application, meets the requirements of sowing and growing of seeds in alpine and water-deficient areas, and is added with the nano boron nitride spheres to enhance the rigidity and toughness of the hydrogel, so that the self-repairing capability, freezing resistance, cold resistance and long-range water retention are improved, and the antibacterial property of the hydrogel is improved by adding the photocatalytic material. The preparation method provided by the embodiment of the invention is simple in preparation process and low in preparation cost, and the prepared hydrogel seed has good antibacterial performance and a protection function, has the characteristic of preventing seed sowing from suffering from diseases and insect pests, can be used as a plant protection and antibacterial product, and is applied to the agricultural fields of water and soil moisture retention, soilless culture, plant growth, seed sowing and the like, and the garden fields of seed sowing, sprout protection, nutrition protection agents and the like.
Example 3:
1) c is to be3N4/SiO2Ball milling pretreatment is carried out on the photocatalytic material to realize the peeling of the two-dimensional layered material and the SiO2Effective compounding is carried out, the ball milling time is 2 hours, the rotating speed is 7000r/min, and C is obtained3N4/SiO2A photocatalytic solution;
2) continuously adding nutrient substances containing inorganic substances, polysaccharide and other organic substances into the photocatalytic solution, wherein the content of the nutrient substances in each 100ml is 7g, the ball milling time is 1 hour, and the rotating speed is 5000 r/min;
3) adding a functional substance and an auxiliary agent into the solution 2), wherein the volume fraction of the auxiliary agent is 25%, and the auxiliary agent comprises gelatin and glycerol, and the volume ratio of the gelatin to the glycerol is 1: 7, the functional substance is in a micro-scale, the adding amount of each 100ml is 0.5g, the substance comprises a mixture of glycerol and nano boron nitride balls, water is added for ball milling and mixing, the ball milling time is 0.5 hour, the rotating speed is 5000r/min, and the photocatalytic hydrogel is obtained and has good freezing resistance, antibacterial property and self-repairing property;
4) soaking willow seed in 50% ethanol solution for 2 min for disinfection, washing with sterile water for several times, and drying at 60 deg.C;
5) and soaking the wicker in the photocatalytic hydrogel to realize effective coating, so as to obtain hydrogel wicker seeds.
The hydrogel wicker seeds prepared in the embodiment can be sown in a cutting mode.
The hydrogel wicker seed prepared by the embodiment of the invention has antibacterial property, and the characteristics of nutrient substance and water retention of the formed hydrogel, has potential of wide application, can meet seed sowing and growth in high-temperature, drought, cold and other areas and environmental weather, prolongs plant protection, prevents nutrient substance loss, and maintains long-range water retention, wherein the nano boron nitride ball is added to enhance the rigidity and toughness of the hydrogel, thereby improving self-repairing capability, frost resistance, cold resistance and long-range water retention; the water retention property, the self-repairing property and the freezing resistance of the hydrogel are improved by adding the glycerol; the self-repairing property and the freezing resistance of the hydrogel can be effectively improved by combining the hydrogel and the water-soluble polymer, and the antibacterial property of the hydrogel is improved by adding the photocatalytic material. The preparation method provided by the embodiment of the invention is simple in preparation process and low in preparation cost, and the prepared hydrogel seed has good antibacterial performance and a protection function, has the characteristic of preventing seed sowing from suffering from diseases and insect pests, can be used as a plant protection and antibacterial product, and is applied to the agricultural fields of water and soil moisture retention, soilless culture, plant growth, seed sowing and the like, and the garden fields of seed sowing, sprout protection, nutrition protection agents and the like.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. The hydrogel seed is characterized by comprising a plant seed and a gel protective layer covering the surface of the plant seed, wherein the gel protective layer comprises the following components:
the mass concentration of the pretreated two-dimensional layered photocatalytic material is not more than 15%;
nano boron nitride balls, 0.01-0.5g/100 ml;
5-7g/100ml of nutrient and/or auxiliary agent, wherein the volume fraction of the auxiliary agent is 20% -30%;
and water.
2. The hydrogel seed of claim 1, wherein: the pretreatment of the two-dimensional layered photocatalytic material comprises at least one treatment mode of ultrasonic treatment, mechanical stirring treatment and ball milling treatment.
3. The hydrogel seed of claim 1, wherein the nano boron nitride spheres are replaced with:
0.05-0.1g/100ml of trivalent ferric salt; alternatively, the first and second electrodes may be,
0.1-0.5g/100ml of glycerol and nano boron nitride ball mixture.
4. The hydrogel seed of any one of claims 1 to 3, wherein:
the two-dimensional layered photocatalytic material comprises at least one of a nano non-metal photocatalytic material, a non-metal doped photocatalytic material and a non-metal composite photocatalytic material; and/or the presence of a gas in the gas,
the auxiliary agent comprises at least one of sodium alginate/propylene glycol mixture, agar, glycerol, gelatin, starch and cellulose; and/or the presence of a gas in the gas,
the nutrient is selected from inorganic substances of nitrogen, phosphorus, potassium, sulfur, calcium and magnesium; at least one of amino acids, polysaccharide organic substances and micronutrients.
5. The hydrogel seed of claim 4, wherein:
the nano non-metal photocatalytic material comprises carbon nitride and boron nitride; and/or the like, and/or,
the non-metal doped photocatalytic material comprises a carbon doped photocatalytic material and a nitrogen doped photocatalytic material; and/or the like, and/or,
the non-metal composite photocatalytic material comprises C3N4Graphene composition or C3N4/SiO2A composition is provided.
6. A method for preparing hydrogel seeds, comprising:
carrying out at least one of stripping treatment of ultrasonic treatment, mechanical stirring treatment and ball milling treatment on the two-dimensional layered photocatalytic material to prepare a photocatalytic solution with the mass concentration of the two-dimensional layered photocatalytic material not more than 15%;
adding 0.01-0.5g/100ml of nano boron nitride balls, water, a nutrient and/or an auxiliary agent into the photocatalytic solution;
preparing a photocatalytic gel from the photocatalytic solution added with the nano boron nitride spheres, water, a nutrient and/or an auxiliary agent;
and coating the photocatalytic gel on the surface of the plant seed to form a gel protective layer.
7. The method for preparing hydrogel seeds of claim 6, wherein the nano boron nitride spheres are replaced with:
0.05-0.1g/100ml of trivalent ferric salt; or
0.1-0.5g/100ml of glycerol and nano boron nitride ball mixture.
8. The method for producing a hydrogel seed as claimed in claim 6 or 7, wherein the photocatalytic solution is subjected to an acid-base blending treatment to adjust the pH to 6 to 8.5.
9. The method for preparing hydrogel seeds as claimed in claim 6 or 7, wherein the amount of the added nutrient in the photocatalytic solution is 5-7g/100ml, the volume fraction of the auxiliary agent is 20-30%, the mechanical stirring speed is 100-3500r/min, the mechanical stirring time is 0.5-1.5 hours, the ultrasonic frequency of the ultrasonic treatment is 25Hz-80Hz, and the ball milling speed of the ball milling treatment is 2000-10000 r/min.
10. The method for preparing a hydrogel seed as claimed in claim 6 or 7, wherein: before the photocatalytic gel is coated on the surface of the plant seed to form a gel protective layer, the seed is disinfected.
CN201911414028.9A 2019-12-31 2019-12-31 Hydrogel seed and preparation method thereof Pending CN110999595A (en)

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CN1406458A (en) * 2001-09-07 2003-04-02 农业技术矢崎株式会社 Gel wrapping seed
CN104558323A (en) * 2014-12-22 2015-04-29 汕头大学 High-water-solubility nanometer hexagonal boron nitride and preparation method of polymer composite hydrogel of high-water-solubility nanometer hexagonal boron nitride

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CN1286894A (en) * 1999-09-03 2001-03-14 农业技术矢崎株式会社 Hulled seed rice coated with gel
CN1406458A (en) * 2001-09-07 2003-04-02 农业技术矢崎株式会社 Gel wrapping seed
CN104558323A (en) * 2014-12-22 2015-04-29 汕头大学 High-water-solubility nanometer hexagonal boron nitride and preparation method of polymer composite hydrogel of high-water-solubility nanometer hexagonal boron nitride

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Application publication date: 20200414