▎ 摘　　要

NOVELTY - Conductive composite polyphenylene sulfide (PPS) material comprises modified graphene/polyacrylonitrile (PAN) carbon fiber or modified graphene/epoxyphenyl graft/polyacrylonitrile carbon fiber and polyphenylene sulfide. USE - The conductive composite PPS material is useful in environmental protection, aerospace, electrical and electronic, and automotive machinery industries (claimed). ADVANTAGE - The method enhances binding force of modified graphene/epoxy phenyl graft/PAN carbon fiber and polyphenylene sulfide, weakens interfacial force of modified graphene/epoxy phenyl graft/PAN carbon fiber and polyphenylene sulfide, uniformly disperses modified graphene/epoxy phenyl graft/PAN carbon fiber, and enhances mechanical and electrical properties of polyphenylene sulfide. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing conductive composite PPS material, comprising (a) mixing 0.6-1.2 pts. wt. polyphenylene sulfide and 8-12 pts. wt. concentrated sulfuric acid, stirring at 80-120 revolutions/minute for 1-3 minutes, adding 0.5-1.2 pts. wt. concentrated nitric acid, continuously stirring for 2-5 minutes, heating to 60-70degrees Celsius, reacting for 0.5-2 hours, centrifuging, washing, and drying to obtain semi-finished products, (b) mixing 0.5-1 pts. wt. semi-finished product and 15-30 pts. wt. N,N-dimethylformamide, stirring at 80-120 revolutions/minute for 1-3 minutes, adding 1-2 pts. wt. sodium dithionite, heating to 160-170degrees Celsius under nitrogen protection, refluxing for 3-4 hours, centrifuging, washing and drying to obtain amino-functionalized polyphenylene sulfide, and (c) subjecting modified graphene/PAN carbon fiber or modified graphene/epoxy phenyl graft/PAN carbon fiber and amino functionalized polyphenylene sulfide to mechanical premixing, melting and blending by double-screw extruder, extruding and granulating to obtain the conductive composite PPS material; (2) preparing modified graphene/PAN carbon fiber, comprising (A) dispersing 0.2-0.6 pts. wt. modified graphene in 200-400 pts. wt. dimethyl sulfoxide, ultrasonically treating for 1-3 hours, where the power is 300-360W, and the frequency is 80-120kHz, adding 90-100 pts. wt. acrylonitrile, 0.1-0.5 pts. wt. azobisisobutyronitrile, 1-2 pts. wt. acrylamide, heating to 60-70degrees Celsius for 18-24 hour in a nitrogen atmosphere to obtain modified graphene/acrylonitrile polymer solution, (B) filtering the modified graphene/acrylonitrile polymer solution using 600-mesh filter membrane, and vacuum degassing the filtered modified graphene/acrylonitrile polymer solution, where the temperature of vacuum defoaming is 40degrees Celsius, the degree of vacuum is -0.06MPa, and the time is 1 hours, and obtaining spinning dope, (C) heating the spinning dope to 65-75degrees Celsius, extruding through spinneret, entering coagulation bath for coagulation and molding, where the spinneret having a diameter of 0.06-0.1mm, the spinning speed is 2-3 m/minutes, the draft ratio is 4.5, and the coagulation bath temperature is 35-45degrees Celsius to obtain modified graphene-polyacrylonitrile composite fiber, where the coagulation bath is at least one of 50-60 wt.% dimethyl sulfoxide aqueous solution, 50-60 wt.% dimethylformamide aqueous solution and 50-60 wt.% dimethylacetamide aqueous solution, (D) pre-oxidizing the modified graphene-polyacrylonitrile composite fiber at 200-300degrees Celsius for 60-90 minutes, and (E) heating 200-300degrees Celsius to 800-900degrees Celsius at a rate of 1-5degrees Celsius/minutes, and the constant temperature is 20-40 minutes, heating to 1300-1500degrees Celsius at a rate of 1-5degrees Celsius/minutes, and insulating the reaction at 1300-1500degrees Celsius for 15-30 minutes to obtain modified graphene/PAN carbon fibers; and (3) preparing modified graphene/epoxy phenyl graft/PAN carbon fiber, comprising (I) dissolving modified graphene, acrylonitrile, azobisisobutyronitrile and methyl methacrylate in dimethyl sulfoxide, and reacting to obtain modified graphene/acrylonitrile polymer solution, (II) filtering and defoaming the modified graphene/acrylonitrile polymer solution to obtain spinning stock solution, (III) extruding the polymer spinning stock solution through spinneret, and introducing into coagulation bath for coagulation and molding to obtain modified graphene-polyacrylonitrile composite fiber, (IV) pre-oxidizing and carbonizing the modified graphene-polyacrylonitrile composite fiber to obtain modified graphene/PAN carbon fiber, and (V) mixing n-hexane solution of 15 wt.% butyllithium, 3-bromophenyloxirane, PAN carbon fiber and toluene, and reacting under nitrogen atmosphere and obtain modified graphene/epoxy phenyl graft/PAN carbon fiber.