Macromolecular composite self-healing hydrogel based on molybdenum disulfide nanosheet and preparation method thereof

Abstract

The invention belongs to the technical field of macromolecular biological materials, and provides a macromolecular composite self-healing hydrogel based on a molybdenum disulfide nanosheet and a preparation method thereof. The macromolecular composite self-healing hydrogel is prepared by performing photo-initiation clicking reaction in a molybdenum disulfide nanosheet water solution; the clicking reaction is generated by unsaturated double bonds in methacrylic anhydride gelatin and sulfydryl in four-branched sulfydryl polyvinyl alcohol under the radiation action of ultraviolet light. The self-healing property is realized by the material utilizing the photo-thermal conversion characteristic of the molybdenum disulfide nanosheet to heat the hydrogel under the radiation action of near-infrared light. The macromolecular composite self-healing hydrogel has the advantages that the nanometer two-dimensional material, namely the molybdenum disulfide nanosheet, is applied into the field of self-healing materials, and the quick healing characteristic of the material under the light stimulation condition is realized.

Description

technical field [0001] The invention belongs to the technical field of macromolecule biomaterials, and in particular relates to a polymer composite self-healing hydrogel based on nanometer thin-layer molybdenum disulfide sheets and a preparation method thereof. Background technique [0002] Self-healing materials are inspired by nature, imitating the healing of biological damage, and through the mechanism of material supply or energy supply, the micro-damage of the material can be automatically healed as a new biomimetic material. [0003] At present, composite hydrogels, nanocomposite hydrogels have made great progress in the field of self-healing, generally composed of immiscible organic (polymer) and inorganic components (clay / particles) and complex (nano- level) structure. McKee et al. (Adv. Funct. Mater. 2014, 24, 2706) prepared a nanocomposite hydrogel through host-guest interaction and has excellent self-healing properties (self-healing time is less than 10s). Spolj...

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Problems solved by technology

In order to solve the technical problems of bioincompatibility, low mechanical strength, and high cost in the prior art, the present invention is based on the characteristics of the excellent light-to-heat conversion effect, good electrical conductivity, and large specific surface area of ​​the nano-thin molybdenum disulfide sheet. , to construct a nanomolybdenum disulfide sheet-polymer composite hydrogel with excellent self-healing properties, and realize its popularization and application in the field of self-healing materials preparation

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