▎ 摘　　要

NOVELTY - A polymer (in parts weight) (0.01-100), polymer/graphene composite masterbatch (0.01-100), filler (0.01-100), sulfur (0.01-20), zinc oxide (0.01-20), antioxidant (0.01-10), plasticizer (0.01-40), flame retardant (0.01-40), catalyst (0.01-10), foam stabilizer (0.01-40), foaming agent (0.01-40), anti-aging agent (0.01-10) and sulfide catalyst (0.01-40) are added to a single-screw extruder, a double-screw extruder, a mixer or a double-roller mill, melted and mixed, mold pressed, and extruded or injection molded, to obtain a polymer/graphene composite material. USE - In-situ reduction preparation of polymer/graphene composite material used for electroconducting material, stealth material, damping material, tire and heat-conducting material (all claimed). ADVANTAGE - The method provides polymer/graphene composite material having excellent mechanical property. DETAILED DESCRIPTION - A graphite oxide (in parts weight) (0.01-10) and solvent (100-3000) are added to an ultrasonic irradiation reactor, and ultrasonically dispersed for 5 minutes to 5 hours, with ultrasonic power of 10-50000 W, frequency of 10-100000 Hz and temperature of 20-200 degrees C, to obtain a graphite oxide solution. A polymer emulsion (5-300) is added, dispersed for 5 minutes to 5 hours ultrasonically, and reductant (0.01-100) is added and dispersed for 5 minutes to 10 hours ultrasonically, to obtain a stable polymer/graphene composite emulsion. A graphite oxide (0.01-10) and solvent (100-3000) are added to a grinder, and ground for 5 minutes to 5 hours, to obtain a graphite oxide solution. A polymer solution (5-300) is added, ground for 5 minutes to 5 hours, and a reductant (0.01-100) is added and ground for 5 minutes to 10 hours, to obtain a stable polymer/graphene composite emulsion. The obtained polymer/graphene composite emulsion is added to demulsifying agent (0.01-30), demulsified at 0-100 degrees C for 1-60 minutes, and dried with vacuum degree of 0.1-0.01 MPa and temperature of 10-200 degrees C, to obtain a polymer/graphene composite masterbatch. A polymer (in parts weight) (0.01-100), polymer/graphene composite masterbatch (0.01-100), filler (0.01-100), sulfur (0.01-20), zinc oxide (0.01-20), antioxidant (0.01-10), plasticizer (0.01-40), flame retardant (0.01-40), catalyst (0.01-10), foam stabilizer (0.01-40), foaming agent (0.01-40), anti-aging agent (0.01-10) and sulfide catalyst (0.01-40) are added to a single-screw extruder, a double-screw extruder, a mixer or a double-roller mill, melted and mixed for 1-60 minutes at 10-330 degrees C, mold pressed, and extruded or injection molded, to obtain a polymer/graphene composite material. The polymer emulsion contains natural latex with solid content of 10-85%, styrene-butadiene latex, butadiene rubber latex, isoprene rubber latex, nitrile latex, butyl rubber latex, silicone emulsion, polyacrylate emulsion, acrylonitrile-butadiene-styrene (ABS) emulsion, polyurethane emulsion, ethylene vinyl acetate (EVA) emulsion, polyvinyl alcohol (PVA) emulsion and polymethyl methacrylate emulsion. The composite material has layer(s) of graphite oxide. The solvent is chosen from water, ethanol, methyl acetate, benzene, toluene, hexane, hexamethylene, acetone, tetrahydrofuran, N,N-dimethylformamide and phenol. The reductant is chosen from hydrazine hydrate, sodium borohydride, butylamine, ethylenediamine, vitamin C and sodium citrate. The demulsifying agent is chosen from formic acid, sodium chloride solution, potassium chloride solution, calcium chloride solution or sodium sulfate solution.