Chitosan derivative self-healing hydrogel and preparation method and application thereof

Abstract

The invention discloses a chitosan derivative self-healing hydrogel and a preparation method and applications thereof. The preparation method of the chitosan derivative self-healing hydrogel includesthe steps of taking and separately dissolving chitosan derivatives and polyvinyl alcohol in deionized water to be then mixed and evenly stirred at a temperature of 30-40 DEG C to obtain a polymer solution, dissolving acrylamide in the deionized water and then adding mixed crosslinking agents therein, adding initiators therein after stirring for 10-15 minutes, adding the mixture into a polymer solution after stirring for 10 to 15 minutes under the protection of nitrogen, fully and evenly stirring the mixture to obtain a composite solution, adding catalysts to the composite solution to be rapidly mixed for 20-60 seconds, and then conducting heat preservation of the composite solution at a temperature of 35-45 DEG C for 8-12 hours obtain the self-healing hydrogel. The prepared chitosan derivative self-healing hydrogel has the advantage of good prospects in the application of Cr6+ (hexavalent chromium) adsorption removal.

Description

technical field

[0001] The invention belongs to the technical field of materials, and in particular relates to a self-healing hydrogel of chitosan derivatives and a preparation method and application thereof. Background technique

[0002] Hydrogels are soft and hydrophilic materials and are common candidates for soft tissues. In recent years, self-healing hydrogels with the ability to repair damage have attracted extensive attention. Self-healing hydrogel materials have the characteristics of self-healing damage. Because their network structure and original characteristics are maintained, they can increase the safety of materials used and prolong the life of materials. They are intelligent new materials with damage management properties. The research on it mainly focuses on non-covalent reactions and dynamic covalent reactions, the former involves hydrogen bonds, ionic bonds, supramolecular interactions and chain entanglements, while the latter involves boronate bonds, disu...

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