▎ 摘　　要

NOVELTY - Preparing graphene/carbon fiber/polypropylene fiber comprises mixing e.g. silane coupling agent to form mixed solution, adding carbon fiber in water, mixing suspension, adding nickel foam, centrifuging, preparing graphene/carbon fiber three-dimensional structure with carbon fiber/nickel foam as anode, using platinum electrode as cathode, using graphene oxide dispersion as electrolyte, depositing layer of reduced graphene oxide on surface of carbon fiber/nickel foam material by electrochemical deposition, replacing electrolyte with sodium chloride solution, using graphene/carbon fiber/nickel foam as anode to carry out electrolytic etching to remove foamed nickel, soaking in hydrochloric acid solution, dispersing graphene/carbon fiber three-dimensional structure in dispersant, mixing with polypropylene, controlling, carrying out melt-blending to master batch, mixing master batch and polypropylene, melting, blending and spinning to obtain graphene/carbon fiber/polypropylene fiber. USE - The method is useful for preparing graphene/carbon fiber/polypropylene fiber. ADVANTAGE - The method: is simple, easy to control, easy-to-obtain raw material and safe; has no pollution; can be prevented by the melt-blending technology and obtains graphene/carbon fiber/polypropylene fiber with more durable electrical conductivity; ensures the graphene will have some residual oxygen-containing functional group during the preparation of graphene/carbon fiber/nickel foam by electrochemical deposition, which can be used as good dispersant for carbon fiber. The fiber: has excellent electrical conductivity and can be used in electrostatic and conductive field; is conducive of three-dimensional structure to the uniform dispersion of filler in polymer material, which is conducive to the diffusion of charges and improves the conductivity of the material. DETAILED DESCRIPTION - Preparing graphene/carbon fiber/polypropylene fiber comprises (a) preparing carbon fiber/foam nickel material: mixing the ethanol aqueous solution with a mass concentration of 50-90% and the silane coupling agent in a mass ratio of 100:2-5 to form a mixed solution, adding carbon fiber into water and ultrasonically stirring to obtain a suspension with a concentration of 1-3 mol/l, mixing the mixture and the suspension at a volume ratio of 1:100-1:20, adding nickel foam of 1.5 mm×2 cm×2 cm and ultrasonicating at 65-75℃ for 1-1.2 hours, centrifuging and drying to obtain carbon fiber/foam nickel material, (b) preparing graphene/carbon fiber three-dimensional structure with carbon fiber/nickel foam as the anode, using the platinum electrode as the cathode and using the graphene oxide dispersion as the electrolyte, depositing a layer of reduced graphene oxide on the surface of the carbon fiber/nickel foam material by electrochemical deposition to obtain graphene/carbon fiber/nickel foam electrode, replacing the electrolyte with sodium chloride solution, using graphene/carbon fiber/nickel foam as the anode to carry out electrolytic etching to remove the foamed nickel and soaking in hydrochloric acid solution for 12 hours to obtain a graphene/carbon fiber three-dimensional structure and (c) preparation of graphene/carbon fiber/polypropylene fiber based on graphene/carbon fiber three-dimensional structure: dispersing the graphene/carbon fiber three-dimensional structure in the dispersant and mixing uniformly with polypropylene, controlling graphene/carbon fiber three-dimensional structure, where the ratio of dispersant is 3:1 and ratio of polypropylene is 1:8-10, carrying out melt blending to manufacture master batch, mixing the master batch and polypropylene uniformly at a mass ratio of 1:8-10, melting, blending and spinning to obtain graphene/carbon fiber/polypropylene fiber.