▎ 摘　　要

NOVELTY - Preparing independent self-supporting graphene alkene carbon nano-tube composite film comprises (1) mixing the graphene oxide and the carboxylated carbon nano-tube to obtain mixture, suction-filtering into composite film by using anodized aluminum oxide (AAO) as substrate; (2) attaching the ncomposite film to the AAO film placed in closed container, and fumigating HI steam, (3) uniformly coating solid transfer agent on the surface of the composite film by evaporation, casting, heating, solidifying solid transfer agent, (4) naturally cooling the composite film coated with solid transfer agent at room temperature, where graphene film is automatically separated from AAO film, (5) slowly evaporating the solid transfer agent from the graphene film supported by the solid transfer agent obtained above at temperature at which the solid transfer agent volatilizes to obtain self-supporting composite film; and (6) placing self-supporting composite film in high temperature furnace, and annealing. USE - The method is useful for preparing independent self-supporting graphene alkene carbon nano-tube. ADVANTAGE - The carbon nano-tube: has excellent electrical conductivity and thermal conductivity, extremely thin thickness (6-100 nm), certain transparency and excellent flexibility. DETAILED DESCRIPTION - Preparing independent self-supporting graphene alkene carbon nano-tube composite film comprises (1) mixing the graphene oxide and the carboxylated carbon nano-tube to obtain mixture having total concentration of 0.5-10 mu g/ml, suction-filtering into composite film by using anodized aluminum oxide (AAO) as substrate; (2) attaching the ncomposite film to the AAO film placed in closed container, and fumigating HI steam at a high temperature of 60-100 degrees C for 1-10 hours, (3) uniformly coating solid transfer agent on the surface of the composite film by evaporation, casting, heating at temperature below 5 degrees below the melting point of the solid transfer agent, solidifying solid transfer agent, (4) naturally cooling the composite film coated with the solid transfer agent at room temperature, where the graphene film is automatically separated from the AAO film, (5) slowly evaporating the solid transfer agent from the graphene film supported by the solid transfer agent obtained above at a temperature at which the solid transfer agent volatilizes to obtain self-supporting composite film; and (6) placing self-supporting composite film in a high temperature furnace, and annealing, where annealing temperature is 2400-3000 degrees C, the annealing time is 1-12 hours, and the heating rate is 1-20 degrees C/minute.