▎ 摘　　要

NOVELTY - Graphene high thermal conductivity material comprises 60-80 pts. wt. graphene, 15-25 pts. wt. polyimide emulsion, 1-5 pts. wt. polyethylene wax, 2-4 pts. wt. polyacrylamide, 1-3 pts. wt. vinyl chloride-vinyl acetate, 1-2 pts. wt. ethylene-vinyl acetate copolymer, 0.1-0.5 pts. wt. sodium dodecyl sulfate, 5-10 pts. wt. ethanol, 1-3 pts. wt. ethylenediamine, 2-6 pts. wt. auxiliary thermal conductive filler, 1-3 pts. wt. silazane, 2-5 pts. wt. toluene diisocyanate, and 30-50 pts. wt. deionized water. USE - Graphene high thermal conductivity material. ADVANTAGE - The graphene high thermal conductivity material has high thermal conductivity, and can reach thermal conductivity of 1700-1900 watts per meter-kelvin, and has cost-effective and easy manufacture. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene high thermal conductivity material, which involves: (a) filling carbon dioxide gas into the graphite powder to make the system pressure at 10-20 megapascal, injecting liquefied carbon dioxide to obtain a graphite dispersion;(b) stirring or shearing rapidly prepared graphite dispersion, where the stirring or shearing rate is 2000-4000 revolutions per minute to obtain a crude product;(c) crushing crude product, peeling at high speed, subjecting to high pressure friction and peeling, or subjecting the crude product to high-pressure friction and peeling, performing high-speed crushing and peeling to obtain graphene;(d) mixing uniformly graphene, ethanol and silazane, mixing, grinding, shearing under ultrasonic condition, where the ultrasonic power is 1000-1200 watt, the time is 40-60 minutes, performing the hot air treatment at 130-150℃ for 2-3 hours to obtain a first product;(e) adding polyimide emulsion, polyethylene wax, polyacrylamide, vinyl chloride-vinyl acetate, ethylene-vinyl acetate copolymer and ethylenediamine to the obtained first product, adding deionized water under nitrogen to react for 1-2 hours to obtain a second mixture;(f) stirring the obtained second mixture, where the rotating speed is 1000-1200 revolutions per minute, and the stirring time is 2-4 hours to obtain the initial product of graphene heat dissipation slurry;(g) adding auxiliary thermal conductive filler, sodium lauryl sulfate and toluene diisocyanate to the obtained initial product of graphene heat dissipation slurry, stirring fully, where the rotating speed is 1200-1500 revolutions per minute, and the stirring time is 2-3 hours, and mixing uniformly to obtain a graphene thermally conductive slurry.