Preparation method of high-strength underwater adhesion type waste chrome leather scrap-based three-network hydrogel

The invention relates to a preparation method of high-strength underwater adhesion type waste chrome leather scrap-based three-network hydrogel. Sulfonic acid microgel is used as a first network, polyacrylamide is used as a second network, tannic acid modified waste chrome leather scrap hydrolysate is used as a third network, and the three-network hydrogel with high strength and underwater adhesion is constructed. Through multiple effects among three network macromolecular chain groups of the hydrogel, chromium in the waste chromium leather shavings is a crosslinking point provided by the hydrogel, so that high strength of the hydrogel is realized; based on the adhesion mechanism of tannic acid imitating mussel mucoprotein, the underwater adhesion of the hydrogel is realized. On one hand, a new thought is provided for high-value utilization of the waste chrome leather scraps; on the other hand, the development of functional hydrogel is promoted. 本发明涉及一种高强度水下粘附型废铬革屑基三网络水凝胶的制备方法。本发明采用磺酸类微凝胶为第一网络，聚丙烯酰胺为第二网络，单宁酸改