▎ 摘　　要

NOVELTY - Graphene/silicon dioxide double hybrid wall modified polystyrene microspheres comprise polystyrene microspheres, silicon dioxide layer and graphene layer, where the silicon dioxide layer and graphene layer are sequentially coated on surface of polystyrene microsphere, and the silicon dioxide layer is connected to graphene layer by polydopamine layer. USE - As graphene/silicon dioxide double hybrid wall modified polystyrene microspheres. ADVANTAGE - The microspheres have excellent thermal stability and mechanical properties, and ensure improved functionality. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the microspheres, involving (a) dispersing lipophilic modified nano-silicon dioxide in water, adding styrene monomer, crosslinking agent and initiator to obtained dispersion, and emulsifying to obtain oil in water-type emulsion, and polymerizing obtained oil in water-type emulsion to obtain polystyrene/silicon dioxide microspheres, (b) dispersing polystyrene/silicon dioxide microspheres in water to obtain microsphere dispersion, uniformly mixing obtained microsphere dispersion liquid with dopamine salt under neutral or alkaline condition, and performing polymerization reaction on obtained mixed solution to obtain intermediate microspheres, and (c) uniformly mixing intermediate microsphere with graphene aqueous dispersion and performing grafting reaction.