▎ 摘　　要

NOVELTY - An asphalt-based carbon fiber composite material comprises asphalt-based carbon fiber, aromatic fused ring molecular inner layer, graphene middle layer and aromatic fused ring molecular outer layer, which are arranged from inside to outside in the radial direction. The graphene middle layer contains graphene dispersed on the surface of the asphalt-based carbon fiber, and is prepared by π-π conjugation of aromatic fused ring molecules and graphene. The aromatic fused ring molecular outer layer is prepared by hydrogen bonding between the terminal amino groups of aromatic fused ring molecules, so that ammonia acts on the surface of graphene to form the outer layer of aromatic fused ring molecules. USE - Asphalt-based carbon fiber composite material is used in aerospace structural and functional integration material, and electronic and electrical materials (all claimed).. ADVANTAGE - The asphalt-based carbon fiber composite material has high interface thermal conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the asphalt-based carbon fiber composite material, which involves dissolving aromatic dibasic anhydride and organic diamine in a polar solvent added with a catalyst, reacting at 150-180℃ for 9-15 hours, washing, suction-filtering, drying to obtain amino-terminated aromatic fused ring molecule powder, dissolving the aromatic fused ring molecular powder in the polar solvent, ultrasonically dispersing to obtain suspension solution with concentration of 10-20 mg/mL, reacting non-sized asphalt-based carbon fiber in the suspension at 150-180℃ for 18-24 hours, vacuum-drying to obtain asphalt-based carbon fiber with aromatic fused ring molecular assembly layer (A), dissolving exfoliated graphene in the polar solvent added with a dispersant, ultrasonically treating for 3-7 hours to obtain a graphene dispersion, soaking asphalt-based carbon fiber in the graphene dispersion for 15-24 hours, vacuum-drying to obtain asphalt-based carbon fiber with graphene assembly layer (B) on the surface, dissolving amino-terminated aromatic condensed ring molecule powder in the polar solvent, ultrasonically dispersing to obtain suspension with concentration of 1-5 mg/mL, adding an alkaline solution to control the pH value to 7-9, placing the asphalt-based carbon fiber in the suspension, reacting for 6-12 hours, vacuum-drying to obtain asphalt-based carbon fiber assembly layer (C) on the surface, then compounding the asphalt-based carbon fiber with a resin system, curing and heating. The molar ratio of aromatic dibasic anhydride to organic diamine is 1:(2-4). The amount of catalyst added is 0.1-0.2 wt.% of aromatic dibasic anhydride. The amount of aromatic fused ring molecular inner layer is 0.5-2 wt.%, graphene assembly layer is 2-3 wt.%, and assembly layer (C) is 2.5-4 wt.%, with respect to non-sized asphalt-based carbon fiber.