▎ 摘　　要

NOVELTY - Graphene composite material comprises 50 pts. wt. graphene, 25-29 pts. wt. polycarbonate, 5-9 pts. wt. 1-ethyl-3-methylimidazolium tetrafluoroborate, 32-36 pts. wt. nickel sulfate, 2-6 pts. wt. acetonitrile, 38-42 pts. wt. polyvinyl alcohol, 7-9 pts. wt. cellulose grafted acrylamide polymer, 16-22 pts. wt. starch-polyacrylic acid graft copolymer, 7-9 pts. wt. polyacrylic acid-acrylonitrile, 20-24 pts. wt. potassium permanganate, 3-5 pts. wt. tungsten carbide, and 4-6 pts. wt. high-strength carbon fiber. USE - Graphene composite material. ADVANTAGE - The graphene composite material has high yield, no pollution, uniform graphitization, has excellent superconductive and radiating performance, strong toughness, light weight, high temperature resistance, flame-retardant, antioxidant, acid and alkali resistance, strong mechanical damage and improves degree of graphitization. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene composite material, which involves: (A) placing graphene, polycarbonate, 1-ethyl-3-methylimidazolium tetrafluoroborate and nickel sulfate in closed reaction vessel, magnetically stirring reaction for 8-12 hours at 80-100 degrees C, performing decompression, suction filtration, and washing, drying and then crushing to obtain powder; (B) dispersing the obtained powder with acetonitrile in deionized water, heating to temperature of 85-95 degrees C in a water bath at a heating rate of 10-12 degrees C/min, keeping the temperature constant for 12-14 hours, filtering and washing to get graphene preliminary product; (C) transferring obtained preliminary product to beaker, followed by adding polyvinyl alcohol, cellulose grafted acrylamide polymer, potassium permanganate, magnetic stirring reaction at 1-3 degrees C for 6-8 hours, and then raising temperature to 35-45 degrees C, performing magnetic stirring reaction for 0.5-1 hour, filtering the suspension and purifying, and spray-drying to obtain graphene oxide; and (D) placing obtained graphene oxide in closed grinding container and crushing for 36-40 hours, and drying obtain graphene nanoparticle dried powder; (E) centrifuging obtained graphene nanoparticle dried powder to obtain high-purity graphene transparent suspension; (F) crushing starch-polyacrylic acid graft copolymer, polyacrylic acid-acrylonitrile, tungsten carbide, and high-strength carbon fiber to particle size of 200 meshes; (G) putting all raw materials in mixer at 120-130 degrees C, high speed mixing for 10-20 minutes to obtain a mixture; (H) mixing obtained mixture with high-purity graphene transparent suspension into twin-screw extruder for extruding and granulating; and (I) placing obtained granulated particles in a dryer at 95-105 degrees C for 2 hours to obtain final product.