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Method for preparing super-strong water-absorbing water-retaining agent

A water-absorbing and water-retaining agent, super-strong technology, applied in the field of preparation of super-strong water-absorbing and water-retaining agent, can solve problems affecting sanitation, stability and safety, affecting water absorption and water retention performance and durability, and prone to mildew, etc. To achieve the effects of shortening the reaction time, no waste liquid discharge, saving water and energy consumption

Inactive Publication Date: 2011-04-13
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because this kind of biodegradable super water-absorbing and water-retaining agent is easy to degrade, it is an ecologically safe water-saving product with a large water absorption multiple, fast water absorption rate, and relatively low cost; but due to the structure of its biomass matrix material, There is a problem that the product is prone to mildew during storage, which affects its own water absorption and water retention performance and durability, and also affects the hygiene, stability and safety of its application

Method used

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Examples

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preparation example Construction

[0030] The preparation method embodiment of the super water-absorbing and water-retaining agent provided by the present invention comprises:

[0031] Paste or disperse easily degradable biomass matrix materials to make a mixture of gelatinized or dispersed biomass matrix materials and unsaturated graft monomers, adjust the pH value to 3-9, add crosslinking agent; The antibacterial active material is used to initiate polymerization to prepare an easily degradable super absorbent and water-retaining agent with antibacterial effect.

[0032] Wherein, the easily degradable biomass matrix material includes one or more of starch, cellulose material, polysaccharide and protein material; such as gelatinizing one or more of starch or polysaccharide, or making fiber Vegetable or proteinaceous materials are dispersed.

[0033] The easily degradable biomass matrix material includes one or more of starch, cellulose material, polysaccharide and protein material.

[0034] Wherein, the anti...

Embodiment 1

[0043] Form a mixture of gelatinized starch and unsaturated grafted monomers by simply gelatinizing starch, adjust the pH value to 3-9, add a cross-linking agent; add 0.2-8.0% of a shell with a molecular weight of 0.9-250,000 in weight percentage For polysaccharides, add an initiator, mix well, and initiate pre-polymerization; control the temperature at 75-95°C to complete the polymerization, and prepare a starch-based super-absorbent and water-retaining agent with antibacterial effect.

[0044] Specifically, the preparation process flow of the above embodiments can be represented by the following application examples.

Embodiment 2

[0055] Form a mixture of gelatinized starch and unsaturated grafted monomers by simply gelatinizing starch, adjust the pH value to 3-9, add a cross-linking agent, and add 0.01-2% potassium sorbate or sorbic acid by weight percentage Sodium, add initiator, mix well, and initiate pre-polymerization; control the temperature at 75-95°C to complete the polymerization, and prepare a starch-based super absorbent and water-retaining agent with antibacterial effect.

[0056] Specifically, the preparation process flow of the above embodiments can be represented by the following application examples.

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Abstract

The invention discloses a method for preparing a super-strong water-absorbing water-retaining agent, which comprises the following steps of: gelatinizing or dispersing a biomass base material which is easy to degrade to form a mixture of the gelatinized or dispersed biomass base material and an unsaturated graft monomer, regulating the pH value to be between 3 and 9, and adding a cross-linking agent; and adding an active material with bacteriostatic and antibacterial activity to initiate polymerization so as to prepare the super-strong water-absorbing water-retaining agent which has bacteriostatic and antibacterial effects and is easy to degrade. The super-strong water-absorbing water-retaining agent which is prepared from the biomass base material such as starch, cellulose, polysaccharide, protein and the like and is easy to degrade has high bacteriostatic and antibacterial characteristics, the problems of poor mildew prevention, water absorption and retention functions and persistent characteristics and the like of the super-strong water-absorbing water-retaining agent product are solved, the preparation process is simplified, reaction time is shortened, production cost is greatly reduced through water and energy conservation, and waste liquid is not generated in the process.

Description

technical field [0001] The invention relates to a super water-absorbing and water-retaining agent of polymer materials, in particular to a preparation method of an easily degradable super-strong water-absorbing and water-retaining agent. Background technique [0002] Since the polymer material of super water-absorbing and water-retaining agent was successfully developed by the researchers of the US Department of Agriculture in 1974, due to its important application value, it has achieved rapid development in scientific research and production. [0003] There are various types of biodegradable super absorbent and water-retaining agents, such as starch-based, cellulose, polysaccharides, proteins and other biomass-based materials, whose water-absorbing performance and characteristics have been greatly improved, and also Show broad application prospects. [0004] Because this kind of biodegradable super water-absorbing and water-retaining agent is easy to degrade, it is an ecol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F251/02C08F289/00C08F2/44C08K5/098C08K3/08C08K5/07
Inventor 白文波赵解春宋吉青
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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