▎ 摘　　要

NOVELTY - Preparing a high-strength graphene composite material involves weighing 100 pts. wt. graphite, 3-7 pts. wt. sodium lignosulfonate, 1.5-3.5 pts. wt. aluminum oxide powder, 15-35 pts. wt. carbon black, 60-80 pts. wt. trimethylolpropane polyether, 15-25 pts. wt. zirconia, 1-5 pts. wt. silica, 15-35 pts. wt. nano boron nitride, 15-25 pts. wt. urethane acrylate, 3-7 pts. wt. zinc borate, 5-9 pts. wt. glass beads, 8-12 pts. wt. zinc oxide, 20-40 pts. wt. PC, 45-65 pts. wt. talc powder, 2-6 pts. wt. coupling agent, grinding graphite, nano boron nitride and glass beads into a grinder for 50-70 minutes, passing through 100-500 mesh, putting sodium lignosulfonate, alumina powder, carbon black and zirconia into a reaction kettle with a thermometer, a heating device and a stirring device, raising the temperature to 55-65 degrees C, stirring at 240-280 revolutions/minute for 60-80 minutes, adding silicon dioxide, zinc borate, zinc oxide and PC. USE - Method for preparing high-strength graphene composite material. ADVANTAGE - The method enables to prepare high-strength graphene composite material which has excellent solvent resistance, good compression set, high strength, high energy density, good electrical conductivity and is easy to operate, provide high efficiency and enables to save energy, prepare accurately, provide notched impact strength 105-145 Joule/metre, is easy to use, provide good thermal conductivity. DETAILED DESCRIPTION - Heating to 75-85 degrees C for 50-70 minutes, stirring uniformly, transferring into a twin-screw extruder for granulation, adding the remaining raw materials, mixing at 280-320 degrees C for 90-110 minutes, putting into the tube furnace and calcining under nitrogen protection, standing and cooling after calcination.