▎ 摘　　要

NOVELTY - Preparing a graphene/aramid fiber 1414 nano-fiber composite membrane, comprises adding potassium hydroxide and dimethyl sulfoxide to aramid fiber 1414 and then reacting to obtain dimethyl sulfoxide solution, ultrasonically dispersing graphite oxide in water to obtain uniformly dispersed graphene oxide solution, centrifuging obtained flocculent precipitate and then separating the precipitate, ultrasonically dispersing in water, performing suction filtration and drying the filter cake, reducing obtained oxidized composite membrane via hydroiodic acid, washing, and then drying. USE - The method is useful for preparing a graphene/aramid fiber 1414 nano-fiber composite membrane (claimed). ADVANTAGE - The membrane has good heat stability, and ensures that tensile strength and the Young modulus can achieve 209.4 Mpa and 29.5 GPa respectively, thus exhibiting excellent mechanical property, and the conductivity can achieve 175 S/m simultaneously, thus exhibiting excellent in conductance. DETAILED DESCRIPTION - Preparing a graphene/aramid fiber 1414 nano-fiber composite membrane, comprises adding potassium hydroxide and dimethyl sulfoxide to aramid fiber 1414, stirring and reacting to obtain dimethyl sulfoxide solution at a temperature of 20-40 degrees C for 7-10 days, adding graphite oxide in water to ultrasonic dispersion to obtain uniformly dispersed graphene oxide solution, then adding obtained dimethyl sulfoxide solution to the graphene oxide solution, and then ultrasonically mixing for 1-2 hours, decompressing and distilling to remove water at a temperature of 70-80 degrees C to obtain 1-5 mg/ml of oxidized graphite alkene dispersing solution of dimethyl sulfoxide, adding obtained dispersing solution to dimethyl sulfoxide solution to obtain flocculent precipitate, where the mass ratio of the dimethyl sulfoxide solution to the oxidized graphite alkene dispersing solution is 1:1-5:1, centrifuging the flocculent precipitate using high speed centrifugation and then separating the precipitate from the mixed solution, ultrasonically dispersing in water and decompressing, performing suction filtration, drying the filter cake to obtain oxidized graphene/aramid fiber 1414 nano-fiber composite membrane, reducing via hydroiodic acid, washing, and then drying.