▎ 摘　　要

NOVELTY - The preparation of graphene composite film, involves (1) vacuumizing experimental device, increasing temperature, controlling air pressure and gas flow, annealing, leading carbon source to surface of copper foil, introducing hydrogen, decomposing carbon source, forming activated carbon atom, dissolving portion of carbon atoms in copper foil to form solid solution, cooling, precipitating carbon atoms, reconstituting film on surface of copper foil, placing graphene film on target stage, accelerating argon ion beam using high voltage electric field, directing ion beam toward graphene film and sputtering to form pores, (2) adding graphene oxide dispersion to filter bowl equipped with polycarbonate membrane, starting vacuum pump and draining liquid in filter bowl to obtain uniform separation membrane, and (3) laminating assembly of filter membrane on ceramic membrane-graphene oxide separation membrane and forming upper and lower ceramic membranes. USE - Preparation of graphene composite film for beer filtration. ADVANTAGE - The method enables preparation of graphene composite film ensuring stable performance and high efficiency by simple, safe and environmentally-friendly process. DETAILED DESCRIPTION - The preparation of graphene composite film, involves (1) vacuumizing experimental device, increasing the temperature to 1000-1100 degrees C under hydrogen and argon atmosphere, controlling air pressure of 300-350 Pa, after reaching target temperature, controlling gas flow and pressure unchanged and annealing for 60-90 minutes, leading carbon source to surface of copper foil at 1000-1100 degrees C, introducing hydrogen, decomposing carbon source at high temperature, forming activated carbon atom, dissolving portion of carbon atoms in copper foil to form solid solution, growing for 30-60 minutes, cooling at rate of -5--10 degrees C/second, cooling to room temperature, precipitating portion of carbon atoms from the surface of copper foil, reconstituting film on the surface of copper foil, placing graphene film on target stage, accelerating argon ion beam using high voltage electric field, directing ion beam with certain energy toward the surface of graphene film and sputtering to form pores, (2) adding 0.02-0.1 %mass graphene oxide dispersion to filter bowl equipped with polycarbonate membrane, starting vacuum pump and draining liquid in filter bowl to obtain uniform separation membrane, and (3) laminating assembly of filter membrane on ceramic membrane-graphene oxide separation membrane and forming upper and lower ceramic membranes.