A degradable natural polymer compound-coated humic acid sand-fixing agent and its preparation method

A technology of natural polymer and humic acid, applied in chemical instruments and methods, fertilizer mixtures, other chemical processes, etc., can solve the problems of soil improvement and poor effect, and achieve the advantages of improving soil, simple preparation process and improving sand fixation effect Effect

Active Publication Date: 2021-05-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing chemical sand fixation method only relies on the cohesion between the sand fixation agent and the sand particles for sand fixation, and the effect is poor; and it only consolidates the soil without improving the soil to achieve the purpose of planting crops

Method used

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  • A degradable natural polymer compound-coated humic acid sand-fixing agent and its preparation method
  • A degradable natural polymer compound-coated humic acid sand-fixing agent and its preparation method
  • A degradable natural polymer compound-coated humic acid sand-fixing agent and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Starch cationic modification

[0043] Weigh 20 parts of starch, make a starch emulsion with an ethanol solution made of 25.5 parts of ethanol and 4.5 parts of water, pour it into a four-neck flask, stir, heat in a water bath to 70°C, and add 0.075mol / L sodium hydroxide ethanol solution Adjust the pH of the starch emulsion to be alkaline, add dropwise an etherification agent made of 1.4 parts of 3-chloro-2 hydroxypropyltrimethylammonium chloride and 0.6 parts of water, and control the system with 0.075 mol / L sodium hydroxide ethanol solution The pH is constant. After the reaction, the pH of the system is adjusted to 6 with 2.0 mol / L hydrochloric acid, and the quaternary ammonium salt type cationic starch product is obtained through dehydration, alcohol washing, drying and sieving.

[0044] (2) Synthesis of Hydrophobic Association Cationic Starch Solution

[0045] Add 15 parts of dried cationic starch and 28 parts of ethanol to a three-necked flask with a stirring de...

Embodiment 2

[0051] (1) Starch cationic modification

[0052]Weigh 20 parts of starch, make a starch emulsion with an ethanol solution made of 25.5 parts of ethanol and 4.5 parts of water, pour it into a four-neck flask, stir, heat in a water bath to 70°C, and add 0.075mol / L sodium hydroxide ethanol solution Adjust the pH of the starch emulsion to be alkaline, add an etherification agent made of 1.3 parts of 3-chloro-2 hydroxypropyltrimethylammonium chloride and 0.7 parts of water dropwise, and control the system with 0.075mol / L sodium hydroxide ethanol solution The pH is constant. After the reaction, the pH of the system is adjusted to 6 with 2.0 mol / L hydrochloric acid, and the quaternary ammonium salt type cationic starch product is obtained through dehydration, alcohol washing, drying and sieving.

[0053] (2) Synthesis of Hydrophobic Association Cationic Starch Solution

[0054] Add 15 parts of dried cationic starch and 28 parts of ethanol to a three-necked flask with a stirring devi...

Embodiment 3

[0060] (1) Starch cationic modification

[0061] Weigh 20 parts of starch, make a starch emulsion with an ethanol solution made of 25.5 parts of ethanol and 4.5 parts of water, pour it into a four-neck flask, stir, heat in a water bath to 70°C, and add 0.075mol / L sodium hydroxide ethanol solution Adjust the pH of the starch emulsion to be alkaline, add an etherification agent made of 1.35 parts of 3-chloro-2 hydroxypropyltrimethylammonium chloride and 0.65 parts of water dropwise, and control the system with 0.075 mol / L sodium hydroxide ethanol solution The pH is constant. After the reaction, the pH of the system is adjusted to 6 with 2.0 mol / L hydrochloric acid, and the quaternary ammonium salt type cationic starch product is obtained through dehydration, alcohol washing, drying and sieving.

[0062] (2) Synthesis of Hydrophobic Association Cationic Starch Solution

[0063] Add 15 parts of dried cationic starch and 28 parts of ethanol to a three-necked flask with a stirring ...

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Abstract

The invention provides a degradable natural polymer compound-coated humic acid sand-fixing agent and a preparation method thereof, which is obtained by coating humic acid with hydrophobically associated cationic starch, specifically: using cationic starch and hydrophobic agent as reaction monomers, Soluble in solvent, carry out grafting reaction under the action of alkaline catalyst, synthesize hydrophobic association cationic starch, add humate solution to hydrophobic association cationic starch, obtain coating, dry and pulverize, obtain sand-fixing agent ; Wherein the hydrophobic agent is a long-chain organic compound capable of reacting with hydroxyl groups under alkaline conditions. The present invention achieves the purpose of sand-fixation through the electrostatic interaction between the cations carried by the sand-fixing agent itself and the anions on the surface of sand grains; and the cationic starch has hydrophilic and water-retaining properties, and humic acid also has some hydrophilic functional groups, so the obtained sand-fixing agent has water-retaining effect. And humic acid also has a certain ability to improve soil.

Description

technical field [0001] The invention belongs to the field of chemical sand-fixing, and relates to a sand-fixing agent capable of water retention, sand-fixing and soil environment improvement, in particular to a degradable natural polymer compound-coated humic acid sand-fixing agent and a preparation method thereof. Background technique [0002] Land desertification is one of the biggest environmental problems facing today, which plagues the survival and development of human society. In the final analysis, the harm caused by the desert lies in the wind erosion, transportation and accumulation of wind and sand flow. [0003] Sand-fixing agents are widely used because of their dust-proof and sand-fixing effects. Sand fixation technologies include engineering sand fixation, biological sand fixation and chemical sand fixation. Chemical sand fixation is a main way of desertification control, and its advantages are low cost, quick effect and simple construction. Existing chemica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/50C09K105/00
CPCC09K17/50C09K2105/00
Inventor 赵艳娜牛育华杨通王晨费贵强阮欢林磊刘一鹤
Owner SHAANXI UNIV OF SCI & TECH
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