CN111518247A - Alkali sorghum straw grafting sand-fixing agent and preparation method thereof - Google Patents
Alkali sorghum straw grafting sand-fixing agent and preparation method thereof Download PDFInfo
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- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical group [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 28
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- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 14
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical group [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 11
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 11
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- UHPMCKVQTMMPCG-UHFFFAOYSA-N 5,8-dihydroxy-2-methoxy-6-methyl-7-(2-oxopropyl)naphthalene-1,4-dione Chemical compound CC1=C(CC(C)=O)C(O)=C2C(=O)C(OC)=CC(=O)C2=C1O UHPMCKVQTMMPCG-UHFFFAOYSA-N 0.000 description 1
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- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F289/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
- C09K17/18—Prepolymers; Macromolecular compounds
- C09K17/32—Prepolymers; Macromolecular compounds of natural origin, e.g. cellulosic materials
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses an alkali sorghum straw grafting sand fixation agent and a preparation method thereof. According to the invention, an emulsion pre-emulsification process is utilized, alkali sorghum straws are used as a substrate to graft acrylate and acetate emulsion to synthesize the novel sand-fixing agent, the prepared novel environment-friendly sand-fixing dust suppressant has good sand-fixing performance, good thermal stability below 300 ℃, good hydrophilic water-retaining property, good toughness after curing, and when the solid content is 1%, the compressive strength of a sand column is more than 1MPa, so that the germination rate and the growth length of seeds can be effectively promoted, and the application requirements are met. And the preparation method has low cost and is simple and easy to implement.
Description
Technical Field
The invention relates to the technical field of agriculture, in particular to an alkali sorghum straw grafting sand fixation agent and a preparation method thereof.
Background
The recycling treatment mode of sorghum straws is generally divided into feed and incineration returning. The problems of low resource utilization rate, large environmental pollution and the like exist all the time. The sorghum straw is composed of a large amount of cellulose, hemicellulose, lignin and the like, and has good hydrophilicity. The recycling of straw waste, modification and monomer reaction to prepare novel polymer materials are one of the hotspots of current research. The benghai city is in a typical karst landform area, and water and soil loss is a main cause of environmental deterioration at present. The natural polymer graft copolymerization sand-fixing agent is considered as the best method for solving the problems.
Lepoutre et al successfully grafted bleached papermaking pulp with polyacrylonitrile, so that research on the preparation of novel materials by using such natural high molecular compounds is active. The GS-3 ecological sand-fixing agent such as marshal and the like is a modified vinyl acetate high-molecular polymer (cationic P (VAc-BA-DMC) emulsion), Zhang Jia jade and the like, which synthesizes a cellulose acrylamide grafted copolymer with certain sand-fixing capacity but poor water-retaining property; yangmingkun and the like synthesize an environment-friendly sand-fixing agent prepared by grafting sodium carboxymethylcellulose with acrylamide, Kongweiqing and the like and prepare a novel sand-fixing dust suppressant of acrylate emulsion by utilizing straws, and the environment-friendly sand-fixing agent is a new research direction and trend for preparing the sand-fixing agent due to cheap raw materials and general performance.
Disclosure of Invention
The purpose of the invention is: the alkali sorghum straw grafted sand fixing agent has good sand fixing performance, can well promote the growth of sand fixing grass seeds, and has a simple and easy preparation method.
The invention is realized by the following steps: preparing butyl acrylate/vinyl acetate by using alkaline sorghum straws as a grafting substrate by adopting an emulsion graft copolymerization method; according to the mass portion, the material comprises 25-35 portions of butyl acrylate, 65-75 portions of vinyl acetate, 3-5 portions of emulsifier, 0.8-1.2 portions of initiator, 2-3 portions of grafting substrate and sufficient deionized water as the preparation raw materials.
The emulsifier is sodium dodecyl benzene sulfonate, and the initiator is ammonium persulfate.
The preparation method of the alkali sorghum straw grafting sand-fixing agent comprises the steps of mixing a grafting substrate and an emulsifier, adding deionized water, keeping stirring and heating to 80-90 ℃, completely dissolving for 15-20 minutes, dropwise adding 1/4 initiator into the mixed solution, dropwise adding 1/4 mixed polymer monomers into the mixed solution, reacting for 1-1.5 hours, slowly dropwise adding the rest initiator solution and monomer mixed solution, reacting for 1 hour at a constant temperature of 65 ℃, stopping heating, continuously stirring and curing for 1 hour, cooling and discharging, and thus obtaining the alkali sorghum straw grafting sand-fixing agent.
The preparation method of the grafting substrate comprises the steps of drying and crushing sorghum straws, sieving the crushed sorghum straws with a 100-mesh sieve, adding 0.1mol/LNaOH solution with a solid-to-liquid ratio of 1:20Kg/L, stirring and soaking the sorghum straws at 45-55 ℃ for more than 24 hours, neutralizing the sorghum straws with dilute hydrochloric acid to be neutral, washing, filtering, and drying to obtain alkali sorghum straws serving as the grafting substrate.
By adopting the technical scheme, compared with the prior art, the novel sand fixing agent is synthesized by using an emulsion pre-emulsification process and taking alkali sorghum straws as a substrate to graft acrylate and acetate emulsion, the prepared novel environment-friendly sand fixing dust suppressant has good sand fixing performance, good thermal stability below 300 ℃, good hydrophilic water retention, good toughness after curing, and sand column compression strength of more than 1MPa when solid content is 1%, and can effectively promote the germination rate and growth length of seeds and meet application requirements. And the preparation method has low cost and is simple and easy to implement.
Drawings
FIG. 1 is an infrared spectrum of a sand-fixing agent and two monomers;
in FIG. 1, a is vinyl acetate; b: methyl acrylate; c, alkali sorghum straws; d, grafting a sand-fixing agent;
FIG. 2 is a thermogravimetric plot of a sand-fixing agent;
FIG. 3 is a scanning electron microscope image of a bonded state of sand grains;
FIG. 4 is a sand column non-standard sample model made with different solid contents;
FIG. 5 is a plot of the maximum compressive strength of sand columns of different solids contents;
FIG. 6 is a water retention curve of sand molds with different solid contents at different times;
FIG. 7 is a graph showing the effect of sand-fixing agents on vegetation growth and germination.
Detailed Description
The embodiment of the invention comprises the following steps: preparing butyl acrylate/vinyl acetate by using alkaline sorghum straws as a grafting substrate by adopting an emulsion graft copolymerization method; the adhesive comprises, by mass, 30 parts of butyl acrylate, 70 parts of vinyl acetate, 5 parts of an emulsifier, 1.2 parts of an initiator, 2 parts of a grafting substrate and sufficient deionized water. The emulsifier is sodium dodecyl benzene sulfonate and the initiator is ammonium persulfate.
In this example, sorghum straw, from five towns, renhuai city; butyl Acrylate (BA), vinyl acetate (VAc), Ammonium Persulfate (APS), Guangfu Density research institute of Fine chemistry; sodium Dodecyl Benzene Sulfonate (SDBS), available from Spodox chemical Co., Ltd. The above reagents are all analytically pure.
A preparation method of an alkali sorghum straw grafting sand-fixing agent,
drying and crushing sorghum straws, sieving the crushed sorghum straws with a 100-mesh sieve, adding 0.1mol/L NaOH solution with a solid-to-liquid ratio of 1:20Kg/L, stirring and soaking the sorghum straws at 45-55 ℃ for more than 24 hours, neutralizing the sorghum straws with dilute hydrochloric acid to be neutral, washing, filtering, and drying to obtain alkali sorghum straws serving as a grafting substrate.
Mixing a grafting substrate and an emulsifier, adding deionized water, keeping stirring, heating to 80-90 ℃, fully dissolving for 15-20 minutes, dropwise adding 1/4 initiator into the mixed solution, dropwise adding 1/4 amount of mixed polymer monomer into the mixed solution, reacting for 1-1.5 hours, then slowly dropwise adding the rest initiator solution and monomer mixed solution, simultaneously completing dropwise adding, reacting for 1 hour at constant temperature of 65 ℃, stopping heating, continuously stirring and curing for 1 hour, cooling and discharging, thus obtaining the alkali sorghum straw grafting sand fixing agent.
In order to verify the technical effect of the present invention, the following tests were performed:
1. characterization and testing
The viscosity test uses 35 ℃ deionized water as standard liquid, and a Ubbelohde viscometer to measure the viscosity of the emulsion of the sand-fixing dust suppressant after being diluted by 10 times.
The infrared spectrum characterization adopts an infrared spectrometer (Nexus670, Nicolet company, USA), a small amount of alkali sorghum straw and grafted product are respectively taken for characterization, and the scanning range is 4000-500 cm-1。
The thermal stability is characterized by taking about 10mg of sand-fixing agent emulsion, analyzing on a microcomputer differential thermal balance (HCT-2 type, Beijing Navy scientific instrument factory), and increasing the temperature at 10 ℃/min and the highest temperature at 400 ℃.
Compressive strength test 75g of fine sand with a sieve hole size of 0.25mm is taken, 10mL of sand-fixing dust suppressant diluted once is added, the mixture is uniformly mixed, poured into a cylindrical mold with the bottom diameter of 5cm and the height of 2.5cm, and compacted to obtain the sand column for test. After complete drying, the compressive strength and compressive retention time of the different sand columns were determined using a 1185 model universal material testing machine (Instron, USA).
Evaluation of surface Sand fixation Effect A certain amount of fine sand with a sieve having a 0.25mm sieve mesh was spread on a watch glass at a rate of 1L/m2The sand-fixing dust suppressant and deionized water are respectively sprayed on the surface of fine sand, a surface sand sample is taken after drying, and the bonding condition among the sand particles is observed by a scanning electron microscope (S4700 model, Hitachi company, Japan).
The method for making sand column for testing water-retaining property includes such steps as putting the sand column under the condition of no wind, measuring its mass at intervals, and calculating out water content (W ═ 1-m)i/m0)×100％
Wherein W is the water content, miFor the mass of water lost, m0Is the total mass of water.
2. Results and discussion
2.1 factors affecting the Performance of the Sand-fixing dust suppressant
2.1.1 monomer ratio
The using amount of the alkali sorghum straws is 2 parts (the following percentages all represent the mass parts of the mixed monomers), the using amount of the APS is 1.2 parts, the using amount of the SDBS is 5 parts, and the polymerization temperature is 65 ℃; the viscosity test temperature is 30 ℃, and the solid content is 3%; the standing stability is based on standing for two days. The influence of different monomer ratios on the performance of the synthetic sand-fixing agent is examined and shown in table 1.
TABLE 1 influence of monomer ratio on the quality of sand-fixing dust suppressant
As can be seen from Table 1, when butyl acrylate is used as a soft monomer, the phenomenon of agglomeration and delamination occurs when the amount of butyl acrylate is increased; the vinyl acetate is a hard monomer, the use level is increased, the viscosity is increased, and the viscosity is not changed linearly after the use level is too high, so that the quality of a finished product is influenced. The comprehensive viscosity, appearance and stability are achieved, and when the ratio of butyl acrylate to vinyl acetate is 3:7, the performance of the synthesized sand fixing agent is optimal.
2.1.2 emulsifiers
The HLB value of the anionic emulsifier SDBS selected herein was 14.5, the amount of emulsifier was varied under the same conditions as in section 2.1.1, and the effect of the amount of emulsifier on the sand-fixing agent performance was examined, the results are shown in Table 2.
TABLE 2 influence of emulsifier dosage on the Sand-fixing dust suppressant Performance
As can be seen from Table 2, the product has better and better dispersibility and is more delicate with the increase of the dosage of the emulsifier. When the concentration of the emulsifier is lower, the initiator initiates the polymerization reaction of the monomer and the grafting substrate to form large latex particles which are easy to separate out from the latex; the dosage of the emulsifier is increased, and the molecular weight of the polymer formed by polymerization is smaller due to the increase of the adsorption force among the emulsions, so that the emulsion is stable; when the dosage of the emulsifier exceeds 7 percent, the viscosity is too high, the average diameter of latex particles is reduced, and the product properties are influenced. Therefore, the emulsifier was selected to account for 5% by weight of the monomer in this experiment.
2.1.3 amount of initiator
Initiators are classified into water-soluble and oil-soluble types. The synthetic sand-fixing dust suppressant emulsion in the experiment is O/W type, the mobile phase is water, and water-soluble Ammonium Persulfate (APS) is selected as an initiator. The amount of the initiator was varied and the other conditions were as in section 2.1.1, and the effect of the amount of the initiator on the sand-fixing agent performance was examined, with the results shown in Table 3.
TABLE 3 influence of initiator dosage on Sand-fixing dust suppressant Performance
As can be seen from Table 3, the viscosity of the overall system gradually decreased with increasing initiator levels. When the amount of the initiator is less, the initiation rate is less, the generated free radicals are less, and a large amount of monomers are remained in the emulsion; along with the increase of the dosage of the initiator, the increase of the content of free radicals and the increase of the polymerization probability of the monomers, the conversion rate and the conversion rate of the polymerization of the monomers are improved, and the emulsion with stable performance is obtained. Therefore, the APS is selected to be 1.2 percent in mass fraction according to the requirements of comprehensive viscosity and product stability
2.1.4 reaction polymerization temperature
APS is used as an initiator and can be effectively decomposed at 50-80 ℃. Other experimental conditions were as in section 2.1.1, the reaction temperature was varied, and the effect of temperature on the performance of the polymeric sand-fixing agent was examined, with the results shown in Table 4.
TABLE 4 Effect of polymerization temperature on the quality of the Sand-fixing dust suppressant
When the temperature is too low, the generation rate of free radicals is low, the initiation rate is slow, and the reaction is difficult to carry out; the temperature is too high, the initiation rate is high, the collision probability of free radicals is increased, and the phenomenon of explosive aggregation is easy to occur. Therefore, in summary, it can be seen that 65 ℃ is the most reasonable temperature for the system.
2.1.5 alkali sorghum straw usage
The alkali sorghum straw is used as a substrate to be added into a reaction system, and the reaction system is a heterogeneous graft copolymerization reaction system. Other experimental conditions are the same as the section 2.1.1, the dosage of the alkali sorghum straws is changed, the influence of the alkali sorghum straws on the sand-fixing agent performance is inspected, and the results are shown in a table 5.
TABLE 5 influence of alkaline sorghum stalks as grafting substrate on the quality of sand-fixing dust suppressant
As can be seen from Table 5, when the amount of the alkali sorghum stalks is low, the monomers in the emulsion can generate a self-polymerization phenomenon, and are not dissolved with the alkali sorghum stalks, and delamination occurs; when the using amount of the alkali sorghum straws is too large, the agglomeration phenomenon is easy to occur. Therefore, the using amount of the alkali sorghum straws is 2 percent by mass.
According to the experimental results, the optimal process for synthesizing the alkali sorghum straw sand-fixing dust suppressant comprises the following steps: mass ratio of monomers (m)BA:mVAc) The ratio of SDBS to APS to alkali sorghum straw is 3:7, the use amounts of SDBS, APS and alkali sorghum straw are respectively 5%, 1.2% and 2%, the reaction temperature is 65 ℃, and the obtained product is light yellow emulsion, has good viscosity and is stable in standing.
2.2 Properties of Sand-fixing Agents
All samples used in the characterization method in this section are synthesized under the optimal condition.
2.2.1 Infrared Spectrum
It can be seen from FIG. 1 that the synthesized product is at 1735cm-1The sharp and strong peak is the-C ═ O stretching vibration peak of ester carbonyl, 1240cm-1Intense peak and 1162cm-1The absorption peaks are respectively the C-O-C antisymmetric vibration peak and the symmetric stretching vibration peak of the ester group, and the two strong peaks indicate that the ester group structure provided by the double monomers BA and VAc exists on the molecular weight of the polymer. In addition, no olefin characteristic peaks were present. At 2960.80cm-1The wide and strong C-H stretching vibration peak in the C-H is absent, which indicates that the grafted sand fixing agent product does not have a C-C double bond structure, and the grafted bimonomers BA and VAc completely react. At 3447cm-1The strong peak appears as a hydroxyl peak. The results show that the sorghum stalks are grafted.
2.2.2 thermal stability
As can be seen from FIG. 2, the evaporation endothermic peak of water appears at 100 ℃ and then enters the plateau phase, so that water adsorbed in the structure can be well maintained when the temperature exceeds the boiling point (100 ℃) of water under normal pressure, namely certain water retention property can be obtained. A distinct broad exothermic oxidation peak occurs at 350 c due to the complete collapse of the main chain molecular structure of the high polymer. The differential thermal-thermogravimetric combined image shows that the synthesized product has good thermal stability at room temperature to 300 ℃. And the highest temperature in the desert is about 80 ℃, so that the obtained product has good application value.
2.3 application Properties of Sand-fixing dust suppressant
2.3.1 surface Sand fixation Effect
After the sand fixing agent is sprayed, a solidification layer is formed on the surface of the sand pile, so that sand and soil below the solidification layer are not easily corroded by wind and rain, and water and soil loss is effectively prevented. FIG. 3 shows the surface sand consolidation after spraying water and sand-fixing agent. FIG. 3(a) the gaps between the sand grains sprayed with water are large, and the sand pile is loose; fig. 3(b) shows that after 3% of the sand fixing agent is sprayed, gaps are almost not formed among sand grains, and a dense chain-shaped and layered structure is formed, so that the surface structure is more compact.
2.3.2 analysis of maximum compressive Strength of Sand columns
The compression curves of sand columns with different solid contents are shown in figure 5, when the solid content of the sand-fixing agent in the sand columns is increased, the compressive capacity of the sand columns is increased along with the solid content, the compressive capacity is close to a linear relation, and when the solid content is only 1%, the compressive strength of the sand columns is 1.42MPa, the national standard is met, and the performance of the obtained sand-fixing agent for solidifying sand grains is excellent.
2.3.3 Water Retention
The sorghum straw graft modification sand-fixing agent is sprayed on the surface of sand to form a solidification layer, so that sand can be fixed, and water in the solidification layer can be kept to slow down evaporation. The water retention curve is shown in FIG. 6.
As can be seen from FIG. 6, the water retention rate of the sand mold sprayed with water is about 50% after 12h, and the water retention rate is lower than 10% after 20h, so that the water is basically lost; the water retention rate of the sand mold sprayed with 1% of the sand fixing agent is reduced to 50% after 15 hours, and is still kept above 20% after 24 hours; after spraying 5% sand fixing agent on the Fusarium sand mold for 24 hours, the water retention rate is more than 40%. It can be seen that the sorghum straw modified sand-fixing agent has good water retention performance, and the higher the content of the sprayed sand-fixing agent is, the better the water retention performance is. The reason is that the sorghum straw modified sand-fixing dust suppressant structurally contains a large number of hydrophilic groups, namely hydroxyl and carboxyl, and can form a solidification layer, and the higher the content of the sand-fixing dust suppressant is, the more compact the solidification layer is, and the better the water retention property is.
2.3.4 Sand-fixation grass seed planting
The synthetic sand-fixing agent in the experiment can enable soil to form a consolidation layer, and the internal soil has better water retention and moisture retention so that vegetation can sprout and grow better. The two kinds of liquid are sprayed on the surface of the floating soil uniformly, and the quality of the sand fixing agent is judged according to the germination rate of plants and the growth rate in a period of time.
FIG. 7(b) shows that the sand-fixing agent with 1% solid content is sprayed, the manila seeds germinate on the third day after planting, and a parallel test shows that the germination rate of the seeds is 96%, the height of the manila is 10cm after seven days, and the growth vigor is good; and 7(a) is sprayed with tap water. The germination is carried out after six days, the germination rate is 50 percent, the average height is 2cm after seven days, and the growth vigor is poor. Therefore, the sand fixing layer formed by the sand soil added with the sand fixing agent provides good water retention for the seeds and promotes the germination rate and the growth length of the seeds.
3 conclusion
(1) The optimal process conditions for preparing the alkali sorghum straw-grafted BA/Vac sand-fixing agent by the emulsion grafting process are as follows: mass ratio of monomers (m)BA:mVAc) The ratio of SDBS to APS to alkali sorghum straw is 3:7, the use amounts of SDBS, APS and alkali sorghum straw are respectively 5%, 1.2% and 2%, and the reaction temperature is 65 ℃.
(2) The novel sand fixing agent has good thermal stability below 300 ℃, has good hydrophilic water retention property, and meets the application requirements.
(3) The novel sand fixing agent has good toughness after being cured, and the compressive strength of a sand column is more than 1MPa when the solid content is 1%, so that the application requirement is met.
(4) The novel sand-fixing agent can effectively promote the germination rate and the growth length of seeds.
Claims (4)
1. An alkali sorghum straw grafting sand-fixing agent is characterized in that: preparing butyl acrylate/vinyl acetate by using an emulsion graft copolymerization method and using alkaline sorghum straws as a grafting substrate; according to the mass portion, the material comprises 25-35 portions of butyl acrylate, 65-75 portions of vinyl acetate, 3-5 portions of emulsifier, 0.8-1.2 portions of initiator, 2-3 portions of grafting substrate and sufficient deionized water as the preparation raw materials.
2. The alkali sorghum straw-grafted sand-fixing agent according to claim 1, wherein: the emulsifier is sodium dodecyl benzene sulfonate, and the initiator is ammonium persulfate.
3. The preparation method of the alkali sorghum straw-grafted sand-fixing agent according to claim 1, characterized in that: mixing a grafting substrate and an emulsifier, adding deionized water, keeping stirring, heating to 80-90 ℃, completely dissolving for 15-20 minutes, dropwise adding 1/4 initiator into the mixed solution, dropwise adding 1/4 mixed polymer monomers into the mixed solution, reacting for 1-1.5 hours, slowly dropwise adding the rest initiator solution and monomer mixed solution, simultaneously completely dropwise adding, reacting for 1 hour at the constant temperature of 65 ℃, stopping heating, continuously stirring and curing for 1 hour, cooling and discharging, and thus obtaining the alkali sorghum straw grafting sand fixing agent.
4. The method of claim 2, wherein: the preparation of the grafting substrate comprises the steps of drying and crushing sorghum straws, sieving the crushed sorghum straws with a 100-mesh sieve, adding 0.1mol/L NaOH solution with a solid-to-liquid ratio of 1:20Kg/L, stirring and soaking the sorghum straws at 45-55 ℃ for more than 24 hours, neutralizing the sorghum straws to be neutral by using dilute hydrochloric acid, washing, filtering, and drying to obtain alkali sorghum straws serving as the grafting substrate.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4303438A (en) * | 1975-12-18 | 1981-12-01 | Technion Research & Development Foundation, Ltd. | Method for stabilization of soil aggregates |
| CN101486915A (en) * | 2008-01-14 | 2009-07-22 | 北京化工大学 | Novel polymer sand fixing agent |
| CN106008857A (en) * | 2016-05-09 | 2016-10-12 | 北京化工大学 | Synthesis and application of novel sand fixing dust inhibitor prepared from alkali corn stalk |
-
2020
- 2020-03-27 CN CN202010229258.4A patent/CN111518247A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4303438A (en) * | 1975-12-18 | 1981-12-01 | Technion Research & Development Foundation, Ltd. | Method for stabilization of soil aggregates |
| CN101486915A (en) * | 2008-01-14 | 2009-07-22 | 北京化工大学 | Novel polymer sand fixing agent |
| CN106008857A (en) * | 2016-05-09 | 2016-10-12 | 北京化工大学 | Synthesis and application of novel sand fixing dust inhibitor prepared from alkali corn stalk |
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