Triple networks hydrogel with high strength made by chemical and physical cross-linking

作者：Xiangong Wang; Fang Zhao; Xuping Qin; Shengyu Feng

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2020, 589: 124428.

DOI：10.1016/j.colsurfa.2020.124428

• Triple networks hydrogel
• Chemical cross-linking
• Physical cross-linking
• High strength

In this work, triple networks hydrogel with high strength were made by chemical and physical cross-linking. A covalent bond cross-linking network was formed by polyacrylamide chains, Alginate Sodium and ion form the second network, then the Poly (vinyl alcohol) was added to form the semi-crystalline physical crosslink network by freezing and thawing process. The prepared hydrogels can be stretched beyond 13 times to their initial length, and the toughness of the hydrogels reach 5 MJ m−3. Therefore, triple networks hydrogels have potential application in biomaterials for the merits of high strength and biocompatibility.