Polyaspartic acid/polyacrylic acid interpenetrating network hydrogel and preparation method thereof

Abstract

The invention relates to a polyaspartic acid / polyacrylic acid interpenetrating network hydrogel. A polyaspartic acid / acrylic acid mixed liquid reacts under the action of a first cross-linking agent to obtain a reaction product, and the reaction product reacts under the actions of a second cross-linking agent and an initiator to prepare the polyaspartic acid / polyacrylic acid interpenetrating network hydrogel. The polyaspartic acid / polyacrylic acid interpenetrating network hydrogel has an interpenetrating porous structure formed in such a way that a first polymer network formed through polyaspartic acid cross-linking and a second polymer network formed through acrylic monomer polymerizing interpenetrate through each other. The polyaspartic acid / polyacrylic acid interpenetrating network hydrogel has relatively high water absorbing ability, relatively high stability, relatively high pH and temperature sensibility, and the like. The polyaspartic acid / polyacrylic acid interpenetrating network hydrogel is relatively low in preparation cost, simple in preparation process, relatively high in yield, and suitable for industrial production, and does not require a catalyst or nitrogen protection during the reaction process.

Description

technical field [0001] The invention belongs to the technical field of polymer hydrogel preparation, and relates to a polyaspartic acid / polyacrylic acid interpenetrating network hydrogel and a preparation method thereof. Background technique [0002] Superabsorbent hydrogel is a polymer that can absorb water dozens or even thousands of times its own weight. Polyaspartic acid hydrogel is a polymer with polyaspartic acid or its derivatives as the backbone, which forms a network structure through cross-linking. It has high water absorption performance, good biodegradability and biodegradability. compatibility. At present, it is widely used in important fields such as health care products, agricultural water retaining agents, wastewater treatment, and controlled release of chemicals. [0003] It is difficult for pure polyaspartic acid hydrogels to have both high water absorption and high gel strength, which limits the application of polyaspartic acid hydrogels to some extent. ...

AI Technical Summary

Problems solved by technology

But the technological process of the preparation method of existing polyaspartic acid / polyacrylic acid (PASP / PAA) interpenetrating network hydrogel is all more complicated, and there are many steps, can use a large amount of organic solvents in the synthetic process, as N,N '-Dimethylformamide and absolute ethanol, etc., and the reaction process requires nitrogen protection, and some even require a catalyst, the preparation cost is high, and it is not suitable for industrial production

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