▎ 摘　　要

NOVELTY - Friction carbon nanotube material is used to prepare graphene film by adding purified multi-wall carbon nanotube powder into graphite mold, discharge plasma sintering, heat pressing, obtaining multi-wall carbon nanotube block body material, mixing silicon carbide ground material and water, coating on an iron disc, drying to obtain ground glass, adhering a load on an upper surface of multi-wall carbon nanotube material block body material, heat pressing with ground glass, and rubbing. USE - Friction carbon nanotube material is used to prepare graphene film (claimed) useful for preparing pressure sensor and graphene device e.g. transistor and supercapacitor. ADVANTAGE - The method is quick, convenient, simple, and easy, has low equipment requirement, and provides thin graphene film with flat, smooth, and glossy surface and good mechanical property. DETAILED DESCRIPTION - Friction carbon nanotube material is used to prepare graphene film by adding purified multi-wall carbon nanotube powder into graphite mold with diameter of 15 mm, discharge plasma sintering at 10-100 MPa, preferably 40 MPa, 1000-2000 degrees C, preferably 1600 degrees C, and 50-100 degrees C/minute, preferably 100 degrees C/minute, heat preserving for 1-5 minutes, preferably 1 minute, heat pressing, and obtaining multi-wall carbon nanotube block body material; manufacturing ground glass by taking 800-mesh silicon carbide (SiC) ground material, adding water, stirring, uniformly coating on an iron disc for 5-15 minutes, preferably 10 minutes, and drying in an oven at 50-100 degrees C, preferably 80 degrees C; adhering a load on an upper surface of multi-wall carbon nanotube material block body material at 0.01-0.1 N/cm2, preferably 0.06 N/cm2, heat pressing the multi-wall carbon nanotube material block body material and ground glass, rubbing at 0.5-1 m/s, preferably 0.5 m/s for 5-15 minutes, preferably 10 minutes, adding the multi-wall carbon nanotube, which falls off from the piece material in an alcohol, ultrasonically dispersing for 3-10 minutes, preferably 5 minutes, centrifuging for 30-45 minutes, preferably 30 minutes, at 5000-10000 revolutions/minute (rpm), preferably 8000 rpm, and taking the upper-layer solution to obtain graphene; and adhering a load on upper surface of multi-wall carbon nanotube piece material wafer at 0.01-0.1 N/cm2, preferably 0.06 N/cm2, repeatedly dispersing the multi-wall carbon nanotube, which falls off from the multi-wall carbon nanotube block body material in N-methyl pyrrolidone organic solvent, ultrasonically processing for 3-10 minutes, preferably 5 minutes, centrifuging at 30-45 minutes, preferably 45 minutes, centrifuging at 5000-10000 rpm, preferably 10000 rpm, taking the upper layer solution, precipitating, and obtaining graphene film.