▎ 摘　　要

NOVELTY - Composite material includes PA66 and PC matrix, modified graphene mixture, glass fiber, silane coupling agent and epoxy resin, mixing matrix, glass fiber, and modified graphene mixture in weight ratio of 7:3:0.6-1.2, and mixing silane coupling agent and epoxy resin in mass ratio of 0.1-0.2 wt.%, and sulfuric acid solution having concentration of 0.2 wt.%. The modified graphene mixture is prepared by uniformly mixing graphene and carbon nanotubes according to mass ratio of 1-5:1. USE - Composite material. ADVANTAGE - The composite material has good surface quality, internal delamination phenomenon, heat conductivity and excellent mechanical property. DETAILED DESCRIPTION - Composite material includes PA66 and PC matrix, modified graphene mixture, glass fiber, silane coupling agent and epoxy resin, mixing matrix, glass fiber, and modified graphene mixture in weight ratio of 7:3:0.6-1.2, and mixing silane coupling agent and epoxy resin in mass ratio of 0.1-0.2 wt.%, and sulfuric acid solution having concentration of 0.2 wt.%. The modified graphene mixture is prepared by uniformly mixing graphene and carbon nanotubes according to mass ratio of 1-5:1. The sulfuric acid solution having mass fraction of 82-86 wt.% and is concentrated at room temperature for 7-14 minutes. The obtained mixture is filtered, neutralized, washed, and re-dispersed with ethanol, is allowed to stand, and freeze-dried to obtain final product. An INDEPENDENT CLAIM is included for a method for preparing glass fiber-graphene-carbon nanotube hybrid filled PA66/PC composite material, which involves: (A) mixing graphene and carbon nanotubes in proportion, adding graphene mixture to concentrated sulfuric acid solution and stirring at room temperature for 7-14 minutes, diluting with water and filtering, washing obtained residue with alkaline solution multiple times, and then washing with water until neutral, dispersing obtained filter residue in ethanol solution, and then adding glass fiber, stirring and placing in 0-4 degrees C environment for 12-18 hours, and freeze-drying to obtain modified graphene-glass fiber mixture; and (B) mixing modified graphene-glass fiber mixture, PA66/PC matrix, silane coupling agent, and epoxy resin, melting, granulating and putting into twin-screw extruder to obtain final product.