▎ 摘　　要

NOVELTY - A polystyrene covalently functionalized graphene is prepared by preparing dispersed graphene oxide gel using Hummers oxidation method, preparing alkynylated graphene, preparing benzyl dithiobenzoate (BDTB), adding BDTB and azobisisobutyronitrile (AIBN) to styrene monomer for reversible addition-fragmentation chain transfer (RAFT) polymerization to occur, purifying, drying to obtain pure polystyrene, and performing 'Click Chemistry' by dissolving alkynylated graphene and polystyrene in dichloromethane, adding triflic acid, ultrasonically dissolving in ice bath, stirring, washing, and drying. USE - Rapid preparation of polystyrene covalently functionalized graphene used as fillers to enhance polymer material. ADVANTAGE - Dispersion experiment improves compatibility of graphene oxide with organic compound and organic polymer. 'Click Chemistry' method has mild polymerization condition, good selectivity, and high reaction recovery rate and simplifies product separation, and production cost is reduced. DETAILED DESCRIPTION - A polystyrene covalently functionalized graphene is prepared by performing Hummers oxidation on graphene, adding sodium dodecylbenzenesulfonate on graphene oxide, ultrasonically dispersing to obtain dispersed graphene oxide gel, performing nucleophilic substitution on epoxy group of graphene oxide with amino group in presence of potassium hydroxide (KOH) to obtain alkynyl-grafted graphene oxide, filtering, washing, vacuum-drying to obtain alkynylated graphene, preparing bromobenzene Grignard reagent, reacting reagent with carbon sulfide, separating, purifying BDTB, adding BDTB and AIBN to styrene monomer for RAFT polymerization to occur, purifying, drying to obtain pure polystyrene, and performing 'Click Chemistry' by dissolving alkynylated graphene and polystyrene in dichloromethane, adding triflic acid, ultrasonically dissolving in ice bath, stirring, washing, and drying. DESCRIPTION OF DRAWING(S) - The drawing shows an infrared spectrum of graphene oxide (a) and alkynylated graphene (b).