▎ 摘　　要

NOVELTY - Graphene toughened modified polystyrene material prepared by adding hydroxylated graphene to ethanol solvent, ultrasonically dispersing uniformly, adding triethanolamine and 3-aminopropyltriethoxysilane, heating, stirring, reacting, filtering, washing and drying for preparing amino functionalized graphene, adding amino-functionalized graphene to toluene solvent under the protection of nitrogen, ultrasonically dispersing, adding pyridine and 2-bromoisobutyryl bromide, stirring and reacting, heating, reacting, centrifugally separating, washing and drying to prepare bromamide functionalized graphene, adding bromamide functionalized graphene to the distilled water solvent, ultrasonically dispersing, adding styrene, activator pentamethyldiethylenetriamine, catalyst copper bromide and co-catalyst copper(II) bromide, freezing, thawing, heating, washing and drying, mixing the solid product through double-roll plasticizer, and extruding through single-screw extruder, is claimed. USE - Used as the graphene toughened modified polystyrene material. ADVANTAGE - The material: has high strength; initiates in-situ polymerization of styrene on the surface of graphene; and bond energy of chemical bonds is much stronger than the van der Waals force between graphene nanoparticles, which improves the interface compatibility of graphene and polystyrene; and has mechanical properties, e.g. tensile strength and impact strength of polystyrene. DETAILED DESCRIPTION - Graphene toughened modified polystyrene material prepared by (a) adding hydroxylated graphene to ethanol solvent, then placing in an ultrasonic processor for ultrasonically dispersing uniformly, adding triethanolamine and 3-aminopropyltriethoxysilane, heating at 40-80 degrees C, stirring, reacting for 6-12 hours, filtering, washing and drying for preparing amino functionalized graphene, (b) adding amino-functionalized graphene to toluene solvent under the protection of nitrogen, ultrasonically dispersing, adding pyridine and 2-bromoisobutyryl bromide in a drop wise manner, stirring and reacting in an ice-water bath for 1-3 hours, heating at 20-30 degrees C, reacting for 10-20 hours, centrifugally separating, washing and drying to prepare bromamide functionalized graphene, and (c) adding bromamide functionalized graphene to the distilled water solvent, ultrasonically dispersing, adding styrene, activator pentamethyldiethylenetriamine, catalyst copper bromide and co-catalyst copper(II) bromide, freezing at 30 to -10 degrees C, then placing in vacuum drying oven for thawing at 20-40 degrees C, repeating the freezing-thawing process for 2-4 times, heating at 50-70 degrees C under the protection of nitrogen atmosphere, stirring for 2-6 hours, centrifugally washing and drying, mixing the solid product through double-roll plasticizer, and extruding through a single-screw extruder, is claimed.