▎ 摘　　要

NOVELTY - Preparing anisotropic modified graphene epoxy resin composite material involves oxidizing natural graphite by using modified hummers method. The pH value is adjusted by using ammonia, and then neutral graphene oxide is prepared by using centrifugal water removal process. The prepared graphene oxide is dissolved in dimethylformamide (DMF) to obtain suspension of graphene oxide. The graphene oxide suspension prepared is coupled with the aminated material. The amination reaction of graphene oxide are performed under ultrasonic conditions. The aminated graphene prepared is reduced by atmospheric pressure method or hydrothermal method to produce reduced aminated graphene, filtered, washed and dried the reduced aminated graphene obtained to obtain modified aminated graphene powder. The modified aminated graphene powder prepared is dissolved in dimethylformamide (DMF) and dispersed uniformly by ultrasonic treatment to prepare modified graphene dispersion liquid. USE - Method for preparing anisotropic modified graphene epoxy resin composite material. ADVANTAGE - The method enables to prepare anisotropic modified graphene epoxy resin composite material that enhances the mechanical and thermal properties of the epoxy resin matrix and improves conductive performance, increases thermal conductivity parallel to the direction of the magnetic field from 0.2-0.7W/(mK), and reduces thermal conductivity perpendicular to the direction of the magnetic field. DETAILED DESCRIPTION - Preparing anisotropic modified graphene epoxy resin composite material involves oxidizing natural graphite by using modified hummers method. The pH value is adjusted by using ammonia, and then neutral graphene oxide is prepared by using centrifugal water removal process. The prepared graphene oxide is dissolved in dimethylformamide (DMF) to obtain suspension of graphene oxide. The graphene oxide suspension prepared is coupled with the aminated material. The amination reaction of the graphene oxide are performed under ultrasonic conditions. The aminated graphene prepared is reduced by atmospheric pressure method or hydrothermal method to produce reduced aminated graphene, filtered, washed and dried the reduced aminated graphene obtained to obtain modified aminated graphene powder. The modified aminated graphene powder prepared is dissolved in dimethylformamide (DMF) and dispersed uniformly by ultrasonic treatment to prepare modified graphene dispersion liquid. The modified graphene dispersion prepared and preheated epoxy resin are subjected to planetary stirring and ultrasonic blending to prepare uniformly dispersed modified graphene epoxy resin slurry. The modified graphene epoxy resin slurry prepared and epoxy resin curing agent are blended, mixed thoroughly and removed bubbles, placed under the action of magnetic field. The curing is made with various directions heterogeneous modified graphene epoxy resin composite material.