▎ 摘　　要

NOVELTY - An electric conductive material comprises 97-99 pts. wt. polystyrene, 1-3 pts. wt. graphene, 1-2 pts. wt. dimethylformamide, 0.01-0.03 pt. wt. aluminate coupling agent, and 0.001-0.003 pt. wt. isocyanate. USE - Electric conductive material used for three-dimensional printing (claimed). ADVANTAGE - The material solves problems such as not enough mechanical properties, poor impact resistance and heat conductivity and has excellent mechanical properties, heat resistance, energy and conductive properties, simple production process, low cost, high safety, and environmental protection property. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of electric conductive material comprising taking graphene, aluminate coupling agent, isocyanate, and dimethylformamide, mixing, and high speed stirring at 600-1200 revolutions/minute (rpm) and 80 degrees C for 1 hour; suction filtering and drying for 20 minutes; and taking polystyrene, melting at 180 degrees C, stirring at 240-300 rpm for 2 hours, where polystyrene and graphene composite material ratio is 36:1, extruding, and granulating at 90-120 rpm and 170-190 degrees C.