▎ 摘　　要

NOVELTY - Composite material comprises graphene, silica, and natural rubber. The silica particles are attached to the graphene sheet layer, and the graphene sheet layer is inserted into the network of the natural rubber. USE - Composite material for rubber composites (claimed). ADVANTAGE - The composite material has simple and practical preparation method, is more practical, and suitable for large-scale industrial application. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing composite material, which involves: (A) dispersing the graphene oxide aqueous solution and silica sol by ultrasonic to obtain a dispersion liquid; (B) dispersing the dispersion and natural rubber again under ultrasonic dispersion to obtain a mixed slurry; (C) reacting the mixed slurry obtained in the above step and the reducing agent, a graphene / silica sol / natural rubber composite liquid is obtained; and (D) demulsifying the graphene / silica sol / natural rubber composite solution, a composite material is obtained.