CN114989358A - Wind-proof sand-fixing agent and its preparation process - Google Patents
Wind-proof sand-fixing agent and its preparation process Download PDFInfo
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- CN114989358A CN114989358A CN202210792981.2A CN202210792981A CN114989358A CN 114989358 A CN114989358 A CN 114989358A CN 202210792981 A CN202210792981 A CN 202210792981A CN 114989358 A CN114989358 A CN 114989358A
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- sand
- sodium carboxymethylcellulose
- acrylamide
- fixing agent
- wind
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- C—CHEMISTRY; METALLURGY
- 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
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
- C08F251/02—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof on to cellulose or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- 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
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
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- C—CHEMISTRY; METALLURGY
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
Abstract
The invention provides a wind-proof sand-fixing agent and a preparation process thereof, wherein the wind-proof sand-fixing agent comprises the following components: the emulsion comprises sodium carboxymethylcellulose, acrylamide and an initiator, wherein the initiator is potassium persulfate, and the feeding ratio of the sodium carboxymethylcellulose aqueous solution to the acrylamide is 2: 1; the sand fixing agent prepared by the invention is matched with the acrylamide through the sodium carboxymethyl cellulose, the solidification strength of the sand fixing agent is high, the high-molecular sodium carboxymethyl cellulose has good stability and cementing property, the acrylamide is introduced, on one hand, the molecular weight of a product is increased, the viscosity of the product is increased, the cementing property is improved, on the other hand, the cross-linking property among different high-molecular chains is also increased, the film forming property is obviously improved, carboxyl introduced on the chains can also carry out a complex reaction with inorganic ions in sandy soil, and the toughness of a solidified layer can be obviously increased, so that the solidified layer has high strength.
Description
Technical Field
The invention belongs to the technical field of wind prevention and sand fixation, and relates to a wind prevention and sand fixation agent and a preparation process thereof.
Background
Desertification is a major global ecological environment problem faced by human beings at present, and desertification zones are often accompanied by ecological problems such as surface drought, water and soil loss and the like, so that the problems of agriculture and forestry are caused, the growth and development of green plants and crops are seriously hindered, the phenomena of seedling shortage, yield reduction, death and the like are caused, and great harm is caused to the development of national economy and society.
At present, the sand control method mainly comprises engineering sand control, plant sand control, chemical sand control and comprehensive sand control, and the engineering sand control has large material consumption, long transport distance and difficult repair and maintenance; the plant sand fixation has high requirements on the environment, and is not easy to implement in a large area in partial areas; the chemical sand fixation has better effect in dry and early flowing desert areas which lack engineering sand fixation materials and have harsh environment, the high molecular polymer sand fixation material is one of the research hotspots of the prior chemical sand fixation material, the sand fixation effect is more obvious than other materials, the stability is better, the high performance polymer which is developed in the prior art has grafted polyacrylic acid, vinyl acetate, acrylonitrile, cellulose and the like, and the high molecular polymer sand fixation material has the characteristics of quick solidification, good cohesiveness, high consolidation strength and the like; however, the material has high cost, large dosage, complex production process and certain influence on the environment, so further research and improvement are still needed.
Disclosure of Invention
The invention aims to provide a wind-proof sand-fixing agent and a preparation process thereof, which aim to solve the problems in the background technology.
The purpose of the invention can be realized by the following technical scheme:
the wind-proof sand-fixing agent comprises the following components:
the emulsion comprises sodium carboxymethylcellulose, acrylamide and an initiator, wherein the initiator is potassium persulfate, and the feeding ratio of the sodium carboxymethylcellulose aqueous solution to the acrylamide is 2: 1.
in the wind-proof sand-fixing agent and the preparation process thereof, the feeding ratio of the sodium carboxymethyl cellulose to the acrylamide is 1: 1,3: 1 or 4: 1.
in the wind-proof sand-fixing agent and the preparation process thereof, the wind-proof sand-fixing agent also comprises borax, urea and starch.
In the windproof sand-fixing agent and the preparation process thereof, the concentration of the potassium persulfate is 0.05g/ml, 0.1g/ml, 0.15g/ml or 0.2 g/ml.
In the wind-proof sand-fixing agent and the preparation process thereof, the preparation process comprises the following specific steps:
the method comprises the following steps: selecting a proper amount of sodium carboxymethylcellulose, adding deionized water, fully stirring to obtain a sodium carboxymethylcellulose aqueous solution, and adjusting the pH value of the sodium carboxymethylcellulose aqueous solution to 8 by using a sodium hydroxide aqueous solution;
step two: adding a proper amount of monomer acrylamide into the sodium carboxymethylcellulose aqueous solution, introducing nitrogen for protection, stirring for 30min, and slowly dropwise adding a proper amount of initiator potassium persulfate solution after full dissolution;
step three: after the dropwise addition is finished, adding borax, urea and starch, mixing and stirring, putting a reaction system into a digital display constant-temperature water bath kettle, and adjusting the reaction temperature to 70 ℃ to enable the sodium carboxymethylcellulose aqueous solution and acrylamide to generate free radical polymerization reaction under the action of an initiator potassium persulfate;
step four: after the reaction is carried out for 4-6h at the constant temperature of 70 ℃, the product is precipitated by ethanol and then is centrifugally separated by a centrifugal machine, the product is fully washed by the ethanol and then is purified by acetone, and a sand fixing agent sample is obtained after drying at 65 ℃.
In the wind-proof sand-fixing agent and the preparation process thereof, the mass proportion of the borax, the urea and the starch is less than 5 percent in the third step.
Compared with the prior art, the wind-proof sand-fixing agent and the preparation process thereof have the advantages that:
1. the sand fixing agent prepared by the invention is matched with the sodium carboxymethyl cellulose and the acrylamide, the solidification strength of the sand fixing agent is high, the high-molecular sodium carboxymethyl cellulose has good stability and cementation characteristic, the acrylamide is introduced, on one hand, the molecular weight of a product is increased, the viscosity of the product is increased, the cementation performance is improved, on the other hand, the cross-linking property among different high-molecular chains is also increased, the film forming performance is obviously increased, carboxyl introduced on the chains can also perform a complex reaction with inorganic ions in sand, and the toughness of a solidified layer can be obviously increased, so that the solidified layer has high strength.
2. The solidified layer formed by the sand fixing agent has larger thickness, can prevent the volatilization of water based on a dense network structure with good crosslinking performance, and the acrylamide has strong hydrophilic group amino and strong hydrogen bonding action, thereby having good water retention and water absorption performance and leading the sand fixing agent to have excellent water retention and water resistance performance.
3. The sand fixing agent synthesized by the invention takes sodium carboxymethylcellulose and acrylamide as raw materials and starch as a raw material, has low cost, easy biodegradability, high viscosity, good water solubility, convenient spraying and use after dilution, good moisture absorption and retention properties, and excellent sand fixing and erosion resistance.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
The first embodiment is as follows:
the wind-proof sand-fixing agent comprises the following components:
the emulsion comprises sodium carboxymethylcellulose, acrylamide and an initiator, wherein the initiator is potassium persulfate;
the preparation process comprises the following specific steps:
the method comprises the following steps: selecting a proper amount of sodium carboxymethylcellulose, adding deionized water, fully stirring to obtain a sodium carboxymethylcellulose aqueous solution, and adjusting the pH value of the sodium carboxymethylcellulose aqueous solution to 8 by using a sodium hydroxide aqueous solution;
step two: adding a proper amount of monomer acrylamide into the sodium carboxymethylcellulose aqueous solution, introducing nitrogen for protection, stirring for 30min, and slowly dropwise adding a proper amount of initiator potassium persulfate solution after full dissolution;
specifically, the feeding ratio of the sodium carboxymethylcellulose to the acrylamide is 1: 1, the concentration of potassium persulfate is 0.05 g/ml.
Step three: after the dropwise addition is finished, adding borax, urea and starch, mixing and stirring, putting a reaction system into a digital display constant temperature water bath kettle, and adjusting the reaction temperature to 70 ℃ to enable the sodium carboxymethylcellulose aqueous solution and acrylamide to generate free radical polymerization under the action of an initiator potassium persulfate;
specifically, the mass ratio of the borax, the urea and the starch is less than 5%.
Step four: after reacting for 4-6h at the constant temperature of 70 ℃, precipitating the product by using ethanol, centrifuging and separating the product by using a centrifugal machine, fully washing the product by using ethanol, purifying the product by using acetone, and drying the product at the temperature of 65 ℃ to obtain a sand fixing agent sample.
Example two:
the wind-proof and sand-fixing agent consists of the following components:
the emulsion comprises sodium carboxymethylcellulose, acrylamide and an initiator, wherein the initiator is potassium persulfate;
the preparation process comprises the following specific steps:
the method comprises the following steps: selecting a proper amount of sodium carboxymethylcellulose, adding deionized water, fully stirring to obtain a sodium carboxymethylcellulose aqueous solution, and adjusting the pH value of the sodium carboxymethylcellulose aqueous solution to 8 by using a sodium hydroxide aqueous solution;
step two: adding a proper amount of monomer acrylamide into the sodium carboxymethylcellulose aqueous solution, introducing nitrogen for protection, stirring for 30min, and slowly dropwise adding a proper amount of initiator potassium persulfate solution after full dissolution;
specifically, the feeding ratio of the sodium carboxymethylcellulose to the acrylamide is 1: 1, the concentration of potassium persulfate was 0.1 g/ml.
Step three: after the dropwise addition is finished, adding borax, urea and starch, mixing and stirring, putting a reaction system into a digital display constant temperature water bath kettle, and adjusting the reaction temperature to 70 ℃ to enable the sodium carboxymethylcellulose aqueous solution and acrylamide to generate free radical polymerization under the action of an initiator potassium persulfate;
specifically, the mass ratio of the borax, the urea and the starch is less than 5%.
Step four: after reacting for 4-6h at the constant temperature of 70 ℃, precipitating the product by using ethanol, centrifuging and separating the product by using a centrifugal machine, fully washing the product by using ethanol, purifying the product by using acetone, and drying the product at the temperature of 65 ℃ to obtain a sand fixing agent sample.
Example three:
the wind-proof sand-fixing agent comprises the following components:
the emulsion comprises sodium carboxymethylcellulose, acrylamide and an initiator, wherein the initiator is potassium persulfate;
the preparation process comprises the following specific steps:
the method comprises the following steps: adding deionized water into a proper amount of sodium carboxymethylcellulose, fully stirring to obtain sodium carboxymethylcellulose aqueous solution, and adjusting with sodium hydroxide aqueous solution to make the pH value of the sodium carboxymethylcellulose aqueous solution be 8;
step two: adding a proper amount of monomer acrylamide into the sodium carboxymethylcellulose aqueous solution, introducing nitrogen for protection, stirring for 30min, and slowly dropwise adding a proper amount of initiator potassium persulfate solution after full dissolution;
specifically, the feeding ratio of the sodium carboxymethylcellulose to the acrylamide is 1: 1, the concentration of potassium persulfate is 0.15 g/ml.
Step three: after the dropwise addition is finished, adding borax, urea and starch, mixing and stirring, putting a reaction system into a digital display constant temperature water bath kettle, and adjusting the reaction temperature to 70 ℃ to enable the sodium carboxymethylcellulose aqueous solution and acrylamide to generate free radical polymerization under the action of an initiator potassium persulfate;
specifically, the mass ratio of the borax, the urea and the starch is less than 5%.
Step four: after the reaction is carried out for 4-6h at the constant temperature of 70 ℃, the product is precipitated by ethanol and then is centrifugally separated by a centrifugal machine, the product is fully washed by the ethanol and then is purified by acetone, and a sand fixing agent sample is obtained after drying at 65 ℃.
Example four:
the wind-proof sand-fixing agent comprises the following components:
the emulsion comprises sodium carboxymethylcellulose, acrylamide and an initiator, wherein the initiator is potassium persulfate;
the preparation process comprises the following specific steps:
the method comprises the following steps: selecting a proper amount of sodium carboxymethylcellulose, adding deionized water, fully stirring to obtain a sodium carboxymethylcellulose aqueous solution, and adjusting the pH value of the sodium carboxymethylcellulose aqueous solution to 8 by using a sodium hydroxide aqueous solution;
step two: adding a proper amount of monomer acrylamide into the sodium carboxymethylcellulose aqueous solution, introducing nitrogen for protection, stirring for 30min, and slowly dropwise adding a proper amount of initiator potassium persulfate solution after full dissolution;
specifically, the feeding ratio of the sodium carboxymethylcellulose to the acrylamide is 2: 1, the concentration of potassium persulfate is 0.05 g/ml.
Step three: after the dropwise addition is finished, adding borax, urea and starch, mixing and stirring, putting a reaction system into a digital display constant temperature water bath kettle, and adjusting the reaction temperature to 70 ℃ to enable the sodium carboxymethylcellulose aqueous solution and acrylamide to generate free radical polymerization under the action of an initiator potassium persulfate;
specifically, the mass proportion of the added borax, the urea and the starch is less than 5%.
Step four: after reacting for 4-6h at the constant temperature of 70 ℃, precipitating the product by using ethanol, centrifuging and separating the product by using a centrifugal machine, fully washing the product by using ethanol, purifying the product by using acetone, and drying the product at the temperature of 65 ℃ to obtain a sand fixing agent sample.
Example five:
the wind-proof sand-fixing agent comprises the following components:
the emulsion comprises sodium carboxymethylcellulose, acrylamide and an initiator, wherein the initiator is potassium persulfate;
the preparation process comprises the following specific steps:
the method comprises the following steps: selecting a proper amount of sodium carboxymethylcellulose, adding deionized water, fully stirring to obtain a sodium carboxymethylcellulose aqueous solution, and adjusting the pH value of the sodium carboxymethylcellulose aqueous solution to 8 by using a sodium hydroxide aqueous solution;
step two: adding a proper amount of monomer acrylamide into the sodium carboxymethylcellulose aqueous solution, introducing nitrogen for protection, stirring for 30min, and slowly dropwise adding a proper amount of initiator potassium persulfate solution after full dissolution;
specifically, the feeding ratio of the sodium carboxymethylcellulose to the acrylamide is 3: 1, the concentration of potassium persulfate is 0.05 g/ml.
Step three: after the dropwise addition is finished, adding borax, urea and starch, mixing and stirring, putting a reaction system into a digital display constant temperature water bath kettle, and adjusting the reaction temperature to 70 ℃ to enable the sodium carboxymethylcellulose aqueous solution and acrylamide to generate free radical polymerization under the action of an initiator potassium persulfate;
specifically, the mass proportion of the added borax, the urea and the starch is less than 5%.
Step four: after reacting for 4-6h at the constant temperature of 70 ℃, precipitating the product by using ethanol, centrifuging and separating the product by using a centrifugal machine, fully washing the product by using ethanol, purifying the product by using acetone, and drying the product at the temperature of 65 ℃ to obtain a sand fixing agent sample.
Example six:
the wind-proof sand-fixing agent comprises the following components:
the emulsion comprises sodium carboxymethylcellulose, acrylamide and an initiator, wherein the initiator is potassium persulfate;
the preparation process comprises the following specific steps:
the method comprises the following steps: adding deionized water into a proper amount of sodium carboxymethylcellulose, fully stirring to obtain sodium carboxymethylcellulose aqueous solution, and adjusting with sodium hydroxide aqueous solution to make the pH value of the sodium carboxymethylcellulose aqueous solution be 8;
step two: adding a proper amount of monomer acrylamide into the sodium carboxymethylcellulose aqueous solution, introducing nitrogen for protection, stirring for 30min, and slowly dropwise adding a proper amount of initiator potassium persulfate solution after full dissolution;
specifically, the feeding ratio of the sodium carboxymethyl cellulose to the acrylamide is 4: 1, the concentration of potassium persulfate is 0.05 g/ml.
Step three: after the dropwise addition is finished, adding borax, urea and starch, mixing and stirring, putting a reaction system into a digital display constant temperature water bath kettle, and adjusting the reaction temperature to 70 ℃ to enable the sodium carboxymethylcellulose aqueous solution and acrylamide to generate free radical polymerization under the action of an initiator potassium persulfate;
specifically, the mass ratio of the borax, the urea and the starch is less than 5%.
Step four: after the reaction is carried out for 4-6h at the constant temperature of 70 ℃, the product is precipitated by ethanol and then is centrifugally separated by a centrifugal machine, the product is fully washed by the ethanol and then is purified by acetone, and a sand fixing agent sample is obtained after drying at 65 ℃.
Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (6)
1. The wind-proof sand-fixing agent is characterized by comprising the following components:
the emulsion comprises sodium carboxymethylcellulose, acrylamide and an initiator, wherein the initiator is potassium persulfate, and the feeding ratio of the sodium carboxymethylcellulose aqueous solution to the acrylamide is 2: 1.
2. the wind-proofing and sand-fixing agent as claimed in claim 1, wherein the ratio of the sodium carboxymethyl cellulose to the acrylamide is 1: 1,3: 1 or 4: 1.
3. the agent for preventing wind and fixing sand of claim 1, wherein said agent further comprises borax, urea and starch.
4. The wind-break and sand-fixation agent as claimed in claim 1, wherein the concentration of said potassium persulfate is 0.05g/ml, 0.1g/ml, 0.15g/ml or 0.2 g/ml.
5. The preparation process of the wind-proof sand-fixing agent according to claim 1, wherein the preparation process comprises the following specific steps:
the method comprises the following steps: selecting a proper amount of sodium carboxymethylcellulose, adding deionized water, fully stirring to obtain a sodium carboxymethylcellulose aqueous solution, and adjusting the pH value of the sodium carboxymethylcellulose aqueous solution to 8 by using a sodium hydroxide aqueous solution;
step two: adding a proper amount of monomer acrylamide into the sodium carboxymethylcellulose aqueous solution, introducing nitrogen for protection, stirring for 30min, and slowly dropwise adding a proper amount of initiator potassium persulfate solution after full dissolution;
step three: after the dropwise addition is finished, adding borax, urea and starch, mixing and stirring, putting a reaction system into a digital display constant-temperature water bath kettle, and adjusting the reaction temperature to 70 ℃ to enable the sodium carboxymethylcellulose aqueous solution and acrylamide to generate free radical polymerization reaction under the action of an initiator potassium persulfate;
step four: after reacting for 4-6h at the constant temperature of 70 ℃, precipitating the product by using ethanol, centrifuging and separating the product by using a centrifugal machine, fully washing the product by using ethanol, purifying the product by using acetone, and drying the product at the temperature of 65 ℃ to obtain a sand fixing agent sample.
6. The wind-proof sand-fixing agent and the preparation process thereof according to claim 1, wherein the mass ratio of the borax, the urea and the starch added in the third step is less than 5%.
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| CN107541216A (en) * | 2016-06-23 | 2018-01-05 | 大冶市华锋纸业有限公司 | Pulping and paper-making waste liquid prepares water conservation agent method of checking winds and fixing drifting sand |
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| CN110819356A (en) * | 2019-09-30 | 2020-02-21 | 北京市政建设集团有限责任公司 | Preparation method of high-compression-resistance cellulose graft copolymerization sand fixation material |
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2022
- 2022-07-05 CN CN202210792981.2A patent/CN114989358A/en active Pending
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