▎ 摘　　要

NOVELTY - Preparing graphene/silica composite material, comprises (i) adding potassium feldspar, ammonium fluoride and concentrated sulfuric acid into a converter reactor, reacting; (ii) subjecting aqueous ammonia under negative pressure to gas absorption hydrolyzed control hydrolysis temperature, subjecting cloudy liquid to hydrolysis reaction, filtering turbid liquid, washing silica to precipitate; (iii) adding precipitated silica with water, spraying silica slurry, carrying out atomization; and (iv) placing silica particles to a reactor, and adding graphene to graphene reactor for vacuum treatment. USE - The method is useful for preparing graphene/silica composite material (claimed). ADVANTAGE - The method completely utilizes potassium feldspar resource, silica having good conductivity, improves compatibility of silica and rubber, antihygroscopic performance of tire, and is simple. DETAILED DESCRIPTION - Preparing graphene/silica composite material, comprises (i) adding potassium feldspar, ammonium fluoride and concentrated sulfuric acid sequentially into a converter reactor in a mass ratio of 1:3-3.5:3.5-4, reacting to produce gases and solid residue at 200-300 degrees C under autogenous pressure; (ii) subjecting 20-30 wt.% aqueous ammonia under negative pressure to gas absorption hydrolyzed control hydrolysis temperature of 5-10 degrees C, subjecting cloudy liquid to hydrolysis reaction, filtering turbid liquid, washing silica to precipitate; (iii) adding precipitated silica with water, to obtain silica slurry, spraying silica slurry at 90-95 degrees C for 5-35 seconds, carrying out atomization of particle size of 5-100 mu , and spray drying the end to obtain silica particles; and (iv) placing silica particles into a reactor, adding graphene into graphene reactor for vacuum treatment, introducing inert carrier gas, introducing carbon source into the reactor containing graphene at 500-1000 degrees C, reacting carbon source for 100-200 minutes, to obtain graphene with silica particles.