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Preparation method of environment-friendly grafted modified high-absorbent material

An environmentally friendly technology for superabsorbent materials, applied in the field of preparation of environmentally friendly graft modified superabsorbent materials, can solve the problems of difficult degradation, low water absorption efficiency, high price, etc., achieve simple preparation methods, increase water absorption rate and Effect of water absorption and product cost reduction

Inactive Publication Date: 2016-09-07
诚和环境科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing starch graft modified superabsorbent materials are still petrochemical products, which have disadvantages such as high price, difficult degradation and low water absorption efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Neutralization of acrylic acid: first drop sodium hydroxide or potassium hydroxide solution into the acrylic acid solution to control the neutralization degree of acrylic acid to 60%;

[0022] (2) Preparation of grafted monomer mixture: add itaconic acid, sodium lignosulfonate and acrylic acid neutralized in step (1) into the reaction beaker at a mass ratio of 2:2:1, and then add appropriate amount of distilled water and the cross-linking agent N,N′-methylenebisacrylamide accounting for 5% of the total mass of the mixed monomers, mixed and stirred to fully dissolve to form a grafted monomer mixed solution;

[0023] (3) Preparation of gelatinized starch liquid: take 15% of the total mass of the monomer mixture and mix plant starch and gelatinized water (the mass ratio of gelatinized water and plant starch is 12g·g -1 ), then gelatinized at 85°C for 25 minutes, and then added organic montmorillonite and initiator ammonium persulfate, wherein, the amount of organic mon...

Embodiment 2

[0028] (1) Neutralization of acrylic acid: first drop sodium hydroxide or potassium hydroxide solution into the acrylic acid solution to control the neutralization degree of acrylic acid to 70%;

[0029] (2) Preparation of grafted monomer mixture: add itaconic acid, sodium lignosulfonate and acrylic acid neutralized in step (1) into the reaction beaker at a mass ratio of 2:1:1, and then add appropriate amount of distilled water and the cross-linking agent N,N'-methylenebisacrylamide accounting for 10% of the total mass of the mixed monomers, mixed and stirred to fully dissolve to form a grafted monomer mixed solution;

[0030] (3) Preparation of gelatinized starch solution: Take 15% of the total mass of the monomer mixture and mix plant starch and gelatinized water (the mass ratio of gelatinized water and plant starch is 15g·g -1 ), then gelatinized at 90°C for 20 minutes, and then added organic montmorillonite and initiator ammonium persulfate, wherein the amount of organic m...

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PUM

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Abstract

The invention discloses a preparation method of environment-friendly grafted modified high-absorbent material, comprising the following steps: (1), neutralizing with acrylic acid; (2), preparing grafted monomer mixed liquid; (3), preparing gelatinized starch solution; (4), graft-reacting; (5), extracting a product. The production method of this material is simple, is easy to implement, is imparted by replacing part of acrylic acid with itaconic acid and sodium lignin sulfonate, environmental friendliness and also enables reduced product cost; in addition, by using organic montmorillonite and taking advantage of own intercalation specificity and nano-scale size, water absorption rate and quantity of the absorbent material are effectively increased; the obtained material has excellent comprehensive performance and promising market prospect.

Description

technical field [0001] The invention relates to the field of water-absorbing materials, in particular to a preparation method of an environment-friendly graft-modified super-absorbent material. Background technique [0002] Super absorbent material is a new type of functional polymer material containing strong hydrophilic groups and having a three-dimensional network structure after moderate crosslinking. It has the characteristics of high water absorption rate and good water retention. It has been widely used in fields such as horticulture, food industry, petrochemical industry and environmental protection. At present, superabsorbent materials prepared by grafting starch with one or more monomeric superabsorbent resins have been rapidly developed and widely used due to the advantages of wide sources, low price, many types, and degradability of starch. However, the existing starch-grafted superabsorbent materials, whose grafts are still petrochemical products, have the disa...

Claims

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Application Information

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IPC IPC(8): C08F291/14C08F222/02C08F220/06C08F2/44C08K3/34
CPCC08F251/00C08F2/44C08F289/00C08K3/346C08F222/02
Inventor 孙云
Owner 诚和环境科技(苏州)有限公司
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