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Preparation method of super absorbent composite resin with functions of preventing soil skin shrinkage and reducing water evaporation

A super absorbent, composite resin technology, applied in the preparation of super absorbent resin, in the field of super absorbent resin, can solve the problems of high use price, environmental pollution, and refractory degradation of mulch film

Active Publication Date: 2019-12-20
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of mulch film, it is difficult to degrade, and it is easy to cause environmental pollution, so its use is limited in windy desert areas

Method used

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  • Preparation method of super absorbent composite resin with functions of preventing soil skin shrinkage and reducing water evaporation
  • Preparation method of super absorbent composite resin with functions of preventing soil skin shrinkage and reducing water evaporation
  • Preparation method of super absorbent composite resin with functions of preventing soil skin shrinkage and reducing water evaporation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1, preparation of methylcellulose-graft-poly(acrylic acid-copolymerization-diacetone acrylamide) / attapulgite superabsorbent resin composite material

[0036] (1) Add 30 mL of distilled water and 0.576 g of methylcellulose into a four-necked flask equipped with mechanical stirring, and stir evenly to obtain a dispersion. Under continuous stirring, 0.72 g of attapulgite was added, and the solution was heated to 60 °C for 60 min. Cool the reactant to 50 °C, add 0.0432 g of potassium persulfate (dissolved in 4 mL of water), and stir for 10 min, the reaction will contain 7.2 g of acrylic acid (neutralization degree is 60%), 1.08 g of diacetone acrylamide and 0.0072 g The mixed solution of N,N-methylenebisacrylamide was dropped into the above system, and then the temperature was slowly raised to 80 °C, and the reaction was carried out at constant temperature for 3 h. Nitrogen was used throughout the experiment. After the reaction, the obtained product was dried a...

Embodiment 2

[0040] Embodiment 2, preparation of hydroxyethyl cellulose-graft-poly(acrylic acid-copolymerization-N-methylolacrylamide) / montmorillonite superabsorbent resin composite material

[0041] (1) Add 40 mL of distilled water and 0.864 g of hydroxyethyl cellulose into a four-neck flask equipped with mechanical stirring, and stir evenly to obtain a dispersion. With continuous stirring, 0.144 g of montmorillonite was added, and the solution was heated to 80 °C for 30 min. Cool the reactant to 50 °C, add 0.072 g of potassium persulfate (dissolved in 7 mL of water), and stir for 10 min, 7.2 g of acrylic acid (neutralization degree is 80%), 1.44 g of N-methylolacrylamide and 0.0108 g N,N-methylenebisacrylamide mixed solution was dropped into the above system, then slowly heated to 60°C, and reacted at constant temperature for 5 h. Nitrogen was used throughout the experiment. After the reaction, the obtained product was dried at 80°C to constant weight, pulverized, and passed through a ...

Embodiment 3

[0045] Embodiment 3, preparation of hydroxypropyl methylcellulose-graft-poly(acrylic acid-copolymerization-N-isopropylacrylamide) / kaolin superabsorbent composite resin

[0046] (1) Add 35 mL of distilled water and 0.72 g of hydroxypropyl methylcellulose into a four-necked flask equipped with mechanical stirring, and stir evenly to obtain a dispersion. With continuous stirring, 0.576 g of kaolin was added, and the solution was heated to 80 °C for 30 min. Cool the reactant to 50 °C, add 0.0576 g of potassium persulfate (dissolved in 6 mL of water), and stir for 10 min, 7.2 g of acrylic acid (neutralization degree is 70%), 1.8 g of N-isopropylacrylamide A mixed solution of 0.0087 g N,N-methylenebisacrylamide was dropped into the above system, then the temperature was raised slowly to 60°C, and the reaction was carried out at a constant temperature for 5 h. Nitrogen was used throughout the experiment. After the reaction, the obtained product was dried at 60°C to constant weight,...

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Abstract

The invention discloses a preparation method of super absorbent composite resin with functions of preventing soil skin shrinkage and reducing water evaporation. According to the preparation method, organic-inorganic composite super absorbent resin is prepared through free radical graft polymerization by taking cellulose, acrylic acid, an acrylamide derivative and inorganic minerals as raw materials, taking a persulfate as an initiator and taking N,N-methylene bisacrylamide as a crosslinking agent; then straw powder, the organic-inorganic composite super absorbent resin and distilled water areadded into clay and / or loess; and uniform stirring is carried out to obtain the soil-based super absorbent resin composite material. The super absorbent composite resin prepared by the method not onlycan reduce soil skin shrinkage, but also has better performance of reducing water evaporation, and can effectively reduce water loss, improve soil ecological functions, provide good water and soil conditions for plant growth, and promote growth of vegetation or crops.

Description

technical field [0001] The invention relates to a superabsorbent resin, in particular to the preparation of a superabsorbent resin capable of preventing soil surface shrinkage and reducing water evaporation, and belongs to the technical field of composite materials and the technical field of water and soil conservation. Background technique [0002] With the development of industrialization, the consumption of petroleum, coal and other mineral resources has aggravated environmental pollution, resulting in a decline in environmental quality or ecological imbalance. In the face of increasingly serious environmental problems, soil and water conservation has shown its important position for the construction of ecological civilization in our country. Water-retaining materials play a very important role in maintaining soil moisture and preventing soil erosion and land desertification. At present, water-retaining materials mainly include superabsorbent resin and plastic film. Due...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C08F251/02C08F220/06C08F222/38C08F220/58C08F220/54C08F2/44C08K3/34C09K105/00
CPCC08F2/44C08F251/02C08K3/346C09K17/40C09K2105/00C08F220/06C08F222/385C08F220/58C08F220/54
Inventor 雷自强程莎李新雪刘晓梅杨尧霞曾巍
Owner NORTHWEST NORMAL UNIVERSITY
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