A kind of chitosan/nano metal composite hydrogel and its preparation method and application

Abstract

The invention discloses a chitosan / nano metal composite hydrogel, a preparation method and application thereof. The chitosan hydrogel containing mercapto or thioether is used as a matrix, and metal nanoparticles with a particle size of 0.1-100nm are uniformly dispersed in the matrix. Can be used in catalysis, water treatment, pharmaceutical and antibacterial fields. The invention has the characteristics of good loading stability and high dispersibility of metal nanoparticles, and also has the characteristics of simple preparation process, convenient operation, low cost and wide application range.

Description

A kind of chitosan / nano metal composite hydrogel and its preparation method and application technical field The present invention relates to a kind of hydrogel and preparation method and application thereof, particularly a kind of chitosan / nano metal composite Hydrogel and preparation method and application thereof. Background technique [0002] Polymer hydrogels are materials with a three-dimensional network structure. Polymers become hydrogel materials must have two Conditions: There are a large number of hydrophilic groups on the main chain or side chain of the polymer and a suitable cross-linked network structure. Preparation of macromolecules The starting materials for hydrogels can be monomers (water- or oil-soluble monomers), polymers (natural or synthetic polymers), or Mixtures of Monomers and Polymers (Functional Materials, 2003(4):382‑385). Hydrogels can produce very obvious in water Swelling behavior, and can maintain a certain shape, will not dissolve....

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Problems solved by technology

[0005] Although there have been studies on the use of hydrogel, graphene, and silica microspheres as carriers to load metal nanoparticles, the current loading methods are more or less poor in loading stability and low in dispersibility. defect

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