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Preparation method of composite super absorbent resin

A superabsorbent resin, a certain amount of technology, applied in the field of superabsorbent resin materials, water-absorbent resin preparation, can solve the problems of easy deformation and broken, strength deterioration, etc., to achieve the effect of increasing water absorption ratio, increasing strength, and fast water absorption rate

Inactive Publication Date: 2019-05-21
TIANJIN AGRICULTURE COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings of the existing superabsorbent resin materials such as poor strength after water absorption, easy deformation and breakage, etc., and provide a preparation method based on monosaccharide / clay composite superabsorbent resin, which uses acrylic acid and acrylamide monomers , and adding monomers and clay to synthesize a composite superabsorbent resin, which improves the water absorption rate of the resin and enhances the strength of the resin after water absorption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) 10 parts (parts by weight, the same below) of acrylic acid are dissolved in water, and NaOH solution is added to prepare an acrylic acid solution with a neutralization degree of 70%. Then add 0.08 parts of potassium persulfate, 0.008 parts of N, N-methylenebisacrylamide and 1.2 parts of acrylamide, stir and mix well to obtain a mixed solution.

[0019] (2) Dissolve 1 part of mannose in the reactor, add 1 part of kaolin, stir and heat up to 50°C.

[0020] (3) The mixed solution obtained in (1) was added dropwise to (2), and after the dropwise addition was completed, the temperature was raised to 75° C. for 4 hours of reaction. After the reaction is finished, the solution is filtered, the filter residue is washed twice with deionized water, and then dried in an oven to obtain a composite superabsorbent resin. The deionized water absorption ratio of the resin prepared in this embodiment is 975.3g / g, and the absorption ratio of 0.9% sodium chloride aqueous solution by ...

Embodiment 2

[0022] (1) Dissolve 10 parts of endenoic acid in water, add NaOH solution, and make a solution of endenoic acid with a neutralization degree of 75%. Then add 0.06 parts of potassium persulfate, 0.007 parts of N, N-methylenebisacrylamide and 1.3 parts of acrylamide, stir and mix well to obtain a mixed solution.

[0023] (2) Dissolve 1 part of mannose in the reactor, add 1 part of bentonite, stir and raise the temperature to 55°C.

[0024] (3) The mixed solution obtained in (1) was added dropwise to (2), and after the dropwise addition was completed, the temperature was raised to 80° C. for 3.5 hours. After the reaction is finished, the solution is filtered, the filter residue is washed twice with deionized water, and then dried in an oven to obtain a composite superabsorbent resin. The deionized water absorption ratio of the resin prepared in this embodiment is 968.6g / g, and the absorption ratio of 0.9% sodium chloride aqueous solution by mass fraction is 91.5g / g.

Embodiment 3

[0026] (1) Dissolve 10 parts of acrylic acid in water, add NaOH solution, and make an acrylic acid solution with a neutralization degree of 80%. Then add 0.07 parts of potassium persulfate, 0.006 parts of N, N-methylenebisacrylamide and 1.4 parts of acrylamide, stir and mix well to obtain a mixed solution.

[0027] (2) Dissolve 1 part of mannose in the reactor, add 1 part of diatomaceous earth, stir and raise the temperature to 45°C.

[0028] (3) The mixed solution obtained in (1) was added dropwise to (2), and after the dropwise addition was completed, the temperature was raised to 70° C. for 3.0 h. After the reaction is finished, the solution is filtered, the filter residue is washed twice with deionized water, and then dried in an oven to obtain a composite superabsorbent resin. The deionized water absorption ratio of the resin prepared in this embodiment is 946.4g / g, and the absorption ratio of 0.9% sodium chloride aqueous solution by mass fraction is 90.7g / g.

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PUM

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Abstract

The invention relates to a preparation method of composite super absorbent resin. The method comprises the step: with water as a solvent, potassium persulfate as an initiator, and N,N-methylene bisacrylamide as a cross-linking agent, enabling monosaccharide molecules and clay to react with an acrylic acid monomer and an acrylamide monomer to obtain the composite super absorbent resin. According tothe super absorbent resin, the water absorption capability of the resin can be effectively improved and the problem that the rigidity of the resin is poorer after water absorption can be improved.

Description

technical field [0001] The invention relates to the technical field of superabsorbent resin materials, in particular to a method for preparing a monosaccharide / clay composite superabsorbent resin, and belongs to the technical field of water-absorbent resin preparation. Background technique [0002] Super Absorbent Polymer (Super Absorbent Polymer, referred to as SAP), is a kind of polymer polymer containing strong hydrophilic groups such as carboxyl and hydroxyl groups and having a highly cross-linked water-absorbing and swelling three-dimensional network structure. thing. The distilled water absorption capacity of superabsorbent resin can reach hundreds of times of its own weight. After absorbing water, its water retention performance is also very strong. Sex is also good. [0003] In the 1980s, the research on the preparation of superabsorbent resin composite materials by using some natural polymer substances (such as starch, cellulose, chitosan, etc.) began to appear. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/56C08F222/38C08F2/44C08K3/34C08K3/36C08K5/053C08K5/1535
Inventor 尹立辉朱华玲许艳玲
Owner TIANJIN AGRICULTURE COLLEGE
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