Method for producing organic/inorganic mixed mode semi-interpenetrating network configuration superpower water absorber

A super water-absorbing agent and network structure technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of reducing the thermal stability of organoclay and limited water absorption, and achieve good salt resistance and thermal stability, Strong water absorption effect

Inactive Publication Date: 2008-06-11
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the surfactant remaining between the layers will reduce the thermal stability of the organoclay
In order to improve thermal stability, it is reported that hydrophilic cationic monomers are used as

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 1g of poly-N-(dimethylamino)methacrylamide hydrochloride to 10g of 6% kaolin, raise the temperature to 60°C, and stir for 3h to obtain poly-N-(dimethylamino)methacrylamide hydrochloride and Compound solution of kaolin. 15 g of acrylic acid solution, 3 mg of N, N'-methylenebisacrylamide and 0.45 g of ammonium persulfate were added sequentially to react for 2 hours. The product absorbs 760g / g of deionized water and 70g / g of physiological saline.

Embodiment 2

[0021] With embodiment 1. The silicate selected is diatomaceous earth. The rate of absorption of deionized water by the product is 1016g / g, and the rate of absorption of normal saline is 126g / g.

Embodiment 3

[0023] With embodiment 1. The selected silicate is bentonite. The rate of absorption of deionized water by the product is 1121g / g, and the rate of absorption of physiological saline is 116g / g.

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Abstract

The invention relates to a preparation method of organic/inorganic compound semi-interpenetrating network super-absorbent, which composites linear polycation and polymer to obtain organic/inorganic compound semi-interpenetrating network super-absorbent. The inventive product has high thermal stability, strength and salt tolerance, which can be used in sanitary and soil improvement fields. The preparation method comprises using cation monomer in-situ intercalation polymerization composite method or linear polycation direct intercalation composite method to prepare a composite solution of polycation and layered silicate, adding monomer, cross linker and initiator, polymerizing and obtaining gel at 20-90DEG C. The invention has the advantages that the invention polymerizes polycation and layered silicate to improve compatibility, and uses inter-penetrating network structure and organic/inorganic composite structure to improve product strength and salt tolerance.

Description

technical field [0001] The invention relates to a preparation method of an organic-inorganic composite semi-interpenetrating network structure superabsorbent, which is composed of a linear polycation and an inorganic layered silicate, and then combined with a slightly cross-linked hydrophilic network polymer Interpenetrating to form an organic-inorganic composite semi-interpenetrating network structure super absorbent. It belongs to the technical field of new materials, and the prepared product has the advantages of high strength and good salt resistance. Background technique [0002] Super absorbent is a polymer with a three-dimensional cross-network structure that can absorb and retain hundreds or even thousands of times its own mass of water. Due to their excellent properties, super absorbents are widely used in many fields, such as agriculture, horticulture, biology, medicine, sanitation, etc. [0003] Traditional superabsorbents are mostly made of acrylic acid, acryla...

Claims

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Application Information

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IPC IPC(8): C08F2/44C08K3/34C08L101/02B01J20/26
Inventor 徐世美王吉德郑柳春黄小娟
Owner XINJIANG UNIVERSITY
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