▎ 摘　　要

NOVELTY - Preparing a high-strength graphene material involves weighing 100 pts. wt. graphite, 8-12 pts. wt. phthalic acid diester, 30-40 pts. wt. methyl isobutyl ketone, 4-8 pts. wt. tridecyl phenyl phosphite, 1-20 pts. wt. styrene-(ethylene-butylene)-styrene (SEBS), 15-25 pts. wt. hemp fiber, 0.3-0.7 pts. wt. calcium stearate, 15-35 pts. wt. polyvinylidene fluoride, 3-7 pts. wt. zinc oxide, 1-5 pts. wt. titanium dioxide, 40-80 pts. wt. polyvinyl chloride (PVC), 8-12 pts. wt. chlorinated polyethylene (CPE), 20-30 pts. wt. styrene maleic anhydride (SMA), 10-30 pts. wt. graphene oxide and 2-6 pts. wt. crosslinking agent. The graphite, polyvinylidene fluoride and PVC are crushed into a grinder for 15-55 minutes and pass through a 200-300 mesh sieve, and then dry in an oven for 20-40 minutes to obtain the mixture. USE - Method for preparing a high-strength graphene material. ADVANTAGE - The method enables to prepare a high-strength graphene material, which has high energy density, good conductivity, thermal conductivity, good printing electrode, high efficiency and energy-saving, good heat conductivity and is convenient and simple process. DETAILED DESCRIPTION - The obtained mixture is mixed with phthalic acid diester, methyl isobutyl ketone, tridecyl phenyl phosphite and hemp fiber are put into a reaction kettle equipped with a thermometer, a heating device and a stirring device, and stirred at a speed of 200-300 revolution per minute (rpm) at 55-65 degrees C for 30-50 minutes to obtain the treated mixture. The obtained treated mixture is mixed with calcium stearate, titanium dioxide, CPE and SMA, heated to 80-100 degrees C, and reacted at constant temperature for 60-80 minutes, stirred, then subjected into the twin-screw extruder for melt plasticization granulation, injection molding spline to obtain the composite. The composite is mixed with remaining raw materials at 400-600 degrees C for 60-100 minutes, and then subjected into a tube furnace and calcining under nitrogen protection to obtain the desired product.