Preparation method of polyaniline/carboxylated graphene composite material

Abstract

The invention discloses a new synthesis method of a polyaniline / carboxylated graphene composite material and belongs to the technical field of composite materials. Firstly, functional modification is conducted on the surface of graphite oxide through NaOH and monochloroacetic acid to convert an epoxy group, a hydroxide group and other oxygen-containing groups on the surface of graphite oxide into carboxyl groups; secondly, graphite oxide is wrapped by a surfactant, and then the carboxyl groups are grafted onto the edge of graphite oxide together with diazonium salt, and carboxylated graphene is obtained; lastly, the carboxylated graphene and an aniline monomer are polymerized, and the polyaniline / carboxylated graphene composite material is prepared. According to the composite material, polyaniline is loaded on the surface of graphene and connected with graphene under the action of a covalent bond; the composite material has a large specific surface area, a novel structure and good electrochemical properties, mechanical properties and chemical stability, and can be used for preparing a supercapacitor, a selective absorbent for specific ions, a catalyst and the like.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a method for preparing a polyaniline / carboxylated graphene composite material, in particular to a composite material prepared by growing polyaniline on the surface of carboxylated graphene with graphite oxide and aniline as raw materials. Material. Background technique [0002] graphene is sp 2 A planar thin film of dense single-layer two-dimensional honeycomb structure composed of bonded carbon atoms. Since its discovery in 2004, it has received extensive attention because of its outstanding physical, thermal, optical, and electrical properties. The thermal conductivity of graphene can reach 3000-5000Wm -1 K -1 , is ten times that of copper. The electron mobility at room temperature is about 10 000 cm 2 V -1 the s -1 , exceeding carbon nanotubes and single crystal silicon. The thickness of graphene is only 0.35nm, but the specific surface area is as high as 26...

AI Technical Summary

Problems solved by technology

The fly in the ointment is the polymer structure of polyaniline itself, and the molecular chain is easily oxidized, which limits its ability to store charges.

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