A kind of poly(styrene-methacrylic acid)-polyaniline-nanometer silver composite microsphere and preparation method thereof

Abstract

The invention belongs to the field of composite materials and specifically relates to poly(styrene-methacrylic acid)-polyaniline-nano-silver composite microsphere and a preparation method thereof. The preparation method of the composite microsphere comprises the following three steps: S1, preparation of poly(styrene-methacrylic acid) microsphere; S2, preparation of poly(styrene-methacrylic acid)-polyaniline composite microsphere; and S3, preparation of the poly(styrene-methacrylic acid)-polyaniline-nano-silver composite microsphere. According to the invention, the poly(styrene-methacrylic acid)-polyaniline composite microsphere is used as a base material. Due to introduction of carboxyl group, the base material has strong negative charge, and can attract positively charged silver-ammonia ion so as to effectively load nano-silver and effectively prevent nano-silver agglomeration, oxidation, etc. The composite microsphere has large specific surface area, and catalytic efficiency of nano-silver can be raised. The preparation method of the invention is simple. The whole reaction system is in a water phase, and the reaction condition is mild. The method provided by the invention is an environment friendly method.

Description

Technical field [0001] The invention belongs to the field of composite materials, and specifically relates to a poly(styrene-methacrylic acid)-polyaniline-nano silver composite microsphere and a preparation method thereof. Background technique [0002] In recent years, nanostructured materials have attracted widespread attention due to their chemical, physical, biological properties and potential applications in many applications. Especially metal nanoparticles and corresponding metal oxides, such as Ag, Au, Cu, TiO 2 , ZnO, etc. These nanostructured materials have been widely used in the field of catalysts. Among them, Ag, as a catalytic material with very high catalytic efficiency, has very important applications in sewage treatment, photocatalytic degradation and photocatalytic hydrogen production. However, a single nano-Ag as a catalytic material has a series of shortcomings such as easy oxidation, easy agglomeration, and high cost. In order to solve these problems, resear...

AI Technical Summary

Problems solved by technology

Invention patent CN105315565A discloses a sulfonated polystyrene / polyaniline / nano-silver composite microsphere, which solves the problem that a single nanometer is easily oxidized and agglomerated as a catalyst to a certain extent, but it still has shortcomings: The particle size of microspheres is relatively large, only micron-scale, not nano-scale, so the specific surface area is relatively small, and the catalytic efficiency is limited; the preparation method is relatively complicated, and sulfonated polystyrene needs to undergo two steps of polymerization and sulfonation , and the use of concentrated sulfuric acid has certain hazards and is also dangerous to the environment. In addition, a low temperature reaction of 0°C is required, and the reaction conditions are relatively harsh

Images