▎ 摘　　要

NOVELTY - Preparing graphene oxide-silica modified natural rubber composite material, comprises (i) fully hydrolyzing amino-containing silane coupling agent in alcohol aqueous solution, and adding silica into it to react to obtain surface aminated silica, (ii) adding certain amount of activator and catalyst into graphene oxide dispersion under ice-water bath conditions, stirring, adding the surface aminated silica dispersion to react, and (iii) making the graphene oxide-silica with deionized water into a dispersion, adding it to the natural rubber latex, and stirring to obtain uniformly dispersed mixed emulsion, adding calcium chloride solution, sodium chloride solution, potassium chloride solution, sodium sulfate solution, hydrochloric acid solution or formic acid solution to the mixed emulsion, and demulsifying and flocculating the mixed emulsion, and placing the raw rubber from which the flocculant has been removed in an oven to be dried to a constant weight to obtain final product. USE - The graphene oxide-silica modified natural rubber composite material is useful for forming graphene oxide-silica modified natural rubber tires having excellent high thermal conductivity and low thermodynamic property (claimed). ADVANTAGE - The method: can reduce the number of mixing stages and mixing time in the rubber preparation process, reduce mixing energy consumption, and reduce dust pollution; can improve the dispersion of graphene oxide-silica in the rubber matrix, increase the interface interaction between graphene oxide-silica and the rubber matrix, and significantly improve the mechanical properties of the final rubber composite; can reduce the frictional heat generation between the filler and the matrix and the interface thermal resistance between the filler and the matrix, and reduce the temperature rise of the tire during driving, thus slows down the thermal aging speed of rubber tires during dynamic use and prolongs the service life of rubber tires. DETAILED DESCRIPTION - Preparing graphene oxide-silica modified natural rubber composite material, comprises (i) fully hydrolyzing amino-containing silane coupling agent in alcohol aqueous solution, adding silica into it to react, thus that the silanol after the hydrolysis of the silane coupling agent and the hydroxyl group on the surface of the silica undergo a dehydration reaction to obtain surface aminated silica, (ii) adding certain amount of activator and catalyst into graphene oxide dispersion under ice-water bath conditions, stirring, adding the surface aminated silica dispersion to react, washing it with water for many times to remove the unreacted activator and catalyst, and freeze-drying to obtain graphene oxide-silica compound particles, and (iii) making the graphene oxide-silica with deionized water into a dispersion, adding it to the natural rubber latex, and stirring to obtain uniformly dispersed mixed emulsion, adding calcium chloride solution, sodium chloride solution, potassium chloride solution, sodium sulfate solution, hydrochloric acid solution or formic acid solution to the mixed emulsion, and demulsifying and flocculating the mixed emulsion, and placing the raw rubber from which the flocculant has been removed in an oven to be dried to a constant weight to obtain final product. An INDEPENDENT CLAIM is also included for forming tires from the graphene-silica modified natural rubber raw rubber composite material, comprising masticating the dried graphene oxide-silica modified natural rubber raw rubber in an internal mixer under the conditions of 90degrees Celsius and 40 revolutions/minute, adding zinc oxide, stearic acid, poly(1,2-dihydro-2,2,4-trimethyl-quinoline) (antioxidant RD), N-(1-methylethyl)-N'-phenylbenzene-1,4-diamine (antioxidant 4010NA) and vulcanization accelerator N-oxydiethylene-2-benzothiazole sulfonamide (NOBS), mixing for 5 minutes, and discharging the rubber compound, adjusting the cavity temperature of the internal mixer to 110degrees Celsius, placing the obtained rubber compound into a internal mixer, mixing for 5 minutes and discharging it again, cooling the rubber material to room temperature, transferring it to an open mill for further mixing, adding sulfur during the mixing process, mixing the rubber material until it is uniform, introducing 10 times until the rubber material has no obvious bubbles to obtain graphene oxide-silica modified natural rubber masterbatch, stop the rubber for 24 hours, starting the mixing again on the open mill until the rubber surface is smooth and even, placing it in a tire vulcanization mold to vulcanize to obtain graphene oxide-silica modified natural rubber tires with excellent high thermal conductivity and low thermodynamic property, vulcanizing the rubber at the same temperature, pressure, and time by using sample mold to prepare a tire rubber sample.