▎ 摘　　要

NOVELTY - A graphene crystal composite PVC antibacterial material comprises nano-titanium dioxide that is loaded on modified graphene crystal and is prepared by polymerization reaction with vinyl chloride monomer. USE - Graphene crystal composite PVC antibacterial material (claimed). ADVANTAGE - The graphene crystal composite PVC antibacterial material has enhanced mechanical performance, improved antibacterial property, reduced agglomeration phenomenon, and excellent material uniformity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of graphene crystal composite PVC antibacterial material, which involves (1) dissolving graphene in an organic solvent to prepare graphene solution, (2) adding the prepared graphene solution to alkali solution, ultrasonically dispersing, adding chloroacetic acid, continuously reacting, centrifuging, and vacuum-drying to obtain surface-modified graphene powder, (3) dissolving the surface-modified graphene powder obtained in the step (2), adding nano-titanium dioxide, ultrasonically vibrating, and vacuum drying to obtain nano-titanium dioxide-graphene crystal, dissolving nano-titanium dioxide-graphene crystal in water to obtain nano-titanium dioxide-graphene-based emulsion, (4) vacuumizing the reaction system, filling inert protection gas, reacting the nano-titanium dioxide-graphene-based emulsion obtained in the step (3), vinyl chloride monomer, dispersant, initiator, deionized water, pH adjuster, plasticizer, and stabilizing agent using suspension polymerization method, using a continuous or one-time addition of vinyl chloride monomer, polymerizing at 50-55 degrees C for 10 hours, quickly cooling to stop the reaction, removing the unreacted vinyl chloride monomer through stripping method, centrifugally dewatering, and drying.