▎ 摘　　要

NOVELTY - A polyvinyl carbazole/graphene composite material comprises single-layer or multiple-layer oxidized graphite obtained from natural graphite by using chemical method; where it is prepared by: (a) reacting oxidized graphite, 3-(trimethoxysilane)propyl acrylate, azodiisobutyronitrile, and phase transfer catalyst phenylethyl dithiobenzoate in N,N-dimethyl formamide; (b) preparing polyvinyl carbazole/oxidized graphite composite material; and (c) adding polyvinyl carbazole/oxidized graphite composite material in organic solvent for supersonic treating, adding reducing agent, and reacting. USE - The polyvinyl carbazole/graphene composite material is useful in storage material for information storage devices (claimed). ADVANTAGE - In preparing the polyvinyl carbazole/graphene composite material, the conditions of the surface initiating reverse addition-broken chain transfer polymerization are simple and the operation is easy. Moreover, the polyvinyl carbazole is tightly combined with the surface of the graphene by conjugated bond; and the preparation process can achieve controllable synthesis of macromolecular weight and arrangement of the molecular weight and can improve the compatibility of two materials. Additionally, the carrier transmission performance of the composite material is enhanced; and the composition material has good application prospect and great economic benefit in photoelectric information material. DETAILED DESCRIPTION - A polyvinyl carbazole/graphene composite material comprises single-layer or multiple-layer oxidized graphite obtained from natural graphite by using chemical method; where it is prepared by: (a) reacting oxidized graphite, 3-(trimethoxysilane)propyl acrylate, azodiisobutyronitrile, and phase transfer catalyst phenylethyl dithiobenzoate in N,N-dimethyl formamide under nitrogen atmosphere for 24-48 hours at 60-70 degrees C; pump filtering; washing; drying to obtain oxidized graphite with groups capable of initiating the reverse addition-broken chain transfer polymerization on surface; where the ratio of oxidized graphite, 3-(trimethoxysilane)propyl acrylate, azodiisobutyronitrile, and phenylethyl dithiobenzoate is 30 mg:0.2-0.6 mmol:0.2-0.3 mmol:0.3-0.6 mmol; (b) adding oxidized graphite with groups capable of initiating the reverse addition-broken chain transfer polymerization into organic solvent of N-vinyl carbazole, initiator azodiisobutyronitrile, and phase transfer catalyst phenylethyl dithiobenzoate; under the protection of nitrogen, reacting for 24-48 hours at 60-80 degrees C; centrifuging, washing; drying with vacuum to obtain polyvinyl carbazole/oxidized graphite composite material; where the ratio of oxidized graphite with groups capable of initiating the reverse addition-broken chain transfer polymerization on surface, N-vinyl carbazole, azodiisobutyronitrile, and phenylethyl dithiobenzoate is 30 mg:5-10 g:0.1-1 mmol:0.2-26 mmol; and (c) adding polyvinyl carbazole/oxidized graphite composite material into organic solvent to supersonic treat for 0.5-2 hours and adding reducing agent; reacting for 24-48 hours at 60-100 degrees C; pouring the reaction liquid into methanol to precipitate; filtering; and drying in vacuum to obtain polyvinyl carbazole/graphene composite material; where the ratio of polyvinyl carbazole and oxidized graphite to reducing agent is 30 mg:1-5 mg. An INDEPENDENT CLAIM is a preparation method of the carbazole/graphene composite material comprising: (a) making single-layer or multiple-layer oxidized graphite obtained from natural graphite by using chemical method; (b) reacting the oxidized graphite obtained in (a), 3-(trimethoxysilane)propyl acrylate, azodiisobutyronitrile, and phase transfer catalyst phenylethyl dithiobenzoate in N,N-dimethyl formamide under nitrogen atmosphere for 24-48 hours at 60-70 degrees C; pump filtering; washing; drying to obtain oxidized graphite with groups capable of initiating the reverse addition-broken chain transfer polymerization on surface; where the ratio of oxidized graphite/3-(trimethoxysilane)propyl acrylate/azodiisobutyronitrile/phenylethyl dithiobenzoate is 30 mg:0.2-0.6 mmol:0.2-0.mmol:0.3-0.6 mmol; (c) adding oxidized graphite with groups capable of initiating the reverse addition-broken chain transfer polymerization into organic solvent of N-vinyl carbazole, initiator azodiisobutyronitrile, and phase transfer catalyst phenylethyl dithiobenzoate; under the protection of nitrogen, reacting for 24-48 hours at 60-80 degrees C; centrifuging, washing; drying with vacuum to obtain polyvinyl carbazole/oxidized graphite composite material; where the ratio of oxidized graphite with groups capable of initiating the reverse addition-broken chain transfer polymerization on surface, N-vinyl carbazole, azodiisobutyronitrile, and phenylethyl dithiobenzoate is 30 mg:5-10 g:0.1-1 mmol:0.2-26 mmol; and (d) adding polyvinyl carbazole/oxidized graphite composite material obtained in (c) into organic solvent to supersonic treat for 0.5-2 hours and adding reducing agent; reacting for 24-48 hours at 60-100 degrees C; pouring the reaction liquid into methanol to precipitate; filtering; drying in vacuum to obtain polyvinyl carbazole/graphene composite material; where the ratio of polyvinyl carbazole and oxidized graphite to reducing agent is 30 mg:1-5 mg.