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Degradable self-repairing water-retaining sand-fixing agent and preparation method thereof

A sand-fixing agent and self-repairing technology, applied in chemical instruments and methods, other chemical processes, organic fertilizers, etc., can solve the problems of pollution in desert areas and the refractory degradation of chemical sand-fixing agents, and achieve long-term sand-fixing time, good sand-fixing effect, The effect of broadening the scope of application

Active Publication Date: 2019-10-15
浙江蓝天知识产权运营管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a degradable self-repairing water-retaining sand-fixing agent and its preparation method, which solves the problem that the chemical sand-fixing agent itself is difficult to degrade and will cause pollution to desert areas in the prior art, The degradable self-repairing water-retaining and sand-fixing agent provided has the advantages of being degradable, repairable, long-term sand-fixing time, good sand-fixing effect and wide application range

Method used

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  • Degradable self-repairing water-retaining sand-fixing agent and preparation method thereof
  • Degradable self-repairing water-retaining sand-fixing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Step 1. Preparation of hydrogel: mix 10 parts by weight of acrylamide, 3 parts of xanthan gum, 10 parts of acrylic acid, and 100 parts of water, add 0.5% of the mass of the mixture as initiator potassium persulfate, and add 0.3% of the mass of the mixture Combined agent N,N'-methylenebisacrylamide, stirred for 20 minutes to obtain a hydrogel for use;

[0023] Step 2. Preparation of microcapsules: mix water-based polyurethane powder with stearic acid in a mass ratio of 100:5, and process it through a vortex airflow refiner at a speed of 300 rpm, so that stearic acid can fully wrap the water-based polyurethane powder, and then add a mass concentration of 8 % of gelatinized starch liquid, the mass ratio of refined modified water-based polyurethane powder to gelatinized starch liquid is 3:2; spray dry at 100°C to obtain microcapsules for use;

[0024] Step 3. Preparation of degradable self-repairing water-retaining and sand-fixing agent: 30 parts by weight of hydrogel in st...

Embodiment 2

[0026] Step 1. Preparation of hydrogel: Mix 15 parts by weight of acrylamide, 5 parts of xanthan gum, 8 parts of acrylic acid, and 110 parts of water, add 0.5% of the mass of the mixture as an initiator potassium persulfate, and add 0.3% of the mass of the mixture Combined agent N,N'-methylenebisacrylamide, stirred for at least 10 minutes, and obtained hydrogel for use;

[0027] Step 2. Preparation of microcapsules: mix water-based polyurethane powder with stearic acid in a mass ratio of 100:5, and process it through a vortex airflow refiner at a speed of 300 rpm, so that stearic acid can fully wrap the water-based polyurethane powder, and then add a mass concentration of 8 % of gelatinized starch liquid, the mass ratio of refined modified water-based polyurethane powder to gelatinized starch liquid is 3:2; spray dry at 100°C to obtain microcapsules for use;

[0028] Step 3. Preparation of degradable self-repairing water-retaining and sand-fixing agent: 30 parts by weight of h...

Embodiment 3

[0030] Step 1. Preparation of hydrogel: Mix 15 parts by weight of acrylamide, 5 parts of xanthan gum, 10 parts of acrylic acid, and 150 parts of water, add 0.5% of the mixture mass of potassium persulfate initiator, and add 0.3% of the mass of the mixture Combined agent N,N'-methylenebisacrylamide, stirred for at least 10 minutes, and obtained hydrogel for use;

[0031] Step 2, preparation of microcapsules: water-based polyurethane powder and stearic acid mass ratio of 100:5 are mixed, and the rotational speed of the vortex airflow refiner is 500rpm to make stearic acid fully wrap the water-based polyurethane powder, and then add a mass concentration of 8 % of gelatinized starch liquid, the mass ratio of refined modified water-based polyurethane powder to gelatinized starch liquid is 3:2; spray dry at 100°C to obtain microcapsules for use;

[0032] Step 3. Preparation of degradable self-repairing water-retaining and sand-fixing agent: 25 parts by weight of hydrogel in step 1, ...

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Abstract

The invention relates to the technical field of soil remediation environment engineering, in particular to a degradable self-repairing water-retaining sand-fixing agent and a preparation method thereof. The self-repairing water-retaining sand-fixing agent comprises the following components in parts by weight: 20-30 parts of hydrogel, 5-10 parts of a microcapsule and 3-5 parts of inorganic powder,wherein the hydrogel is xanthan gum / acrylic acid / acrylamide ternary hydrogel; a core material of the microcapsule is waterborne polyurethane powder, and a wall material of the microcapsule is gelatinized starch. The preparation method comprises the following steps: dissolving and preparing the hydrogel; mixing the waterborne polyurethane powder with the gelatinized starch liquid and spray-drying to obtain the microcapsule; and mixing the hydrogel, the microcapsule and the inorganic powder to obtain the sand-fixing agent. The invention solves the problem that a chemical sand fixing agent itselfis difficult to degrade and causes pollution to desert areas in the prior art, and the degradable self-repairing water-retaining sand-fixing agent provided by the invention has the advantages of being degradable, repairable, good in sand-fixing effect and wide in application range.

Description

technical field [0001] The invention relates to the technical field of soil restoration and environmental engineering, in particular to a degradable self-repairing water-retaining and sand-fixing agent and a preparation method thereof. Background technique [0002] Land desertification is one of the biggest environmental and socio-economic problems facing the world today, and it is also the largest and most harmful type of desertification in my country. Land desertification not only worsens the fragile ecological environment, but also seriously affects the industrial and agricultural production and people's life in desertified areas. The rapid expansion of desertified land has caused environmental degradation and huge economic losses, and has become a hot spot of global concern. To curb the increasingly rampant trend of desertification, it is necessary to carry out sand fixation. Land desertification: Land degradation in arid, semi-arid and sub-humid dry areas caused by va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K105/00
CPCC09K17/40C09K2105/00
Inventor 陈庆昝航
Owner 浙江蓝天知识产权运营管理有限公司
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