Preparation method of polyaniline/carboxylated graphene composite material

A technology of carboxylated graphene and composite materials, applied in the field of composite materials, can solve the problems of limited charge storage capacity and easy oxidation of molecular chains

Inactive Publication Date: 2016-08-17
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The fly in the ointment is the polymer structure of polyaniline itself, and the

Method used

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  • Preparation method of polyaniline/carboxylated graphene composite material
  • Preparation method of polyaniline/carboxylated graphene composite material
  • Preparation method of polyaniline/carboxylated graphene composite material

Examples

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Embodiment Construction

[0033] The preparation, structure, and morphology of the polyaniline / carboxylated graphene composite material of the present invention will be further described through specific examples below.

[0034] (1) Preparation of graphite oxide

[0035] Weigh 0.5g flake graphite, add 4.5g potassium permanganate into a three-necked flask and mix well. Measure 7.5ml of concentrated phosphoric acid into the beaker, measure 60ml of concentrated sulfuric acid and slowly pour it into the concentrated phosphoric acid. Place the three-neck flask in an ice-water bath and stir. Slowly add the above mixed acid, stir and react at 30~40°C for 1h, then raise the temperature to 50°C and continue the reaction for 12h. Cool to room temperature after the reaction, slowly pour the reaction product into ice water containing 10mL of hydrogen peroxide, let it stand, pour off the supernatant, filter with suction, and wash the filter cake with 5% hydrochloric acid until there is no SO in the filtrate. 4 ...

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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...

Claims

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Application Information

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IPC IPC(8): C08G73/02C08K9/10C08K9/02C08K9/04C08K3/04
CPCC08G73/0266C08K3/04C08K9/02C08K9/04C08K9/10
Inventor 郭瑞斌祁磊莫尊理缑浩
Owner NORTHWEST NORMAL UNIVERSITY
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