▎ 摘　　要

NOVELTY - Performing size separation of graphene oxide involves controlling freezing rate of graphene oxide aqueous dispersion. USE - Performing size separation of graphene oxide for comprehensively utilizing graphene oxide, preparing printing inks, three dimentional structural construction or conductive materials and antibacterial(claimed). ADVANTAGE - The method enables to perform size separation of graphene oxide smaller graphene oxide which has smaller diffusion speed, high oxygen-containing functional group density, quickly combined with ice on the contrary, slow larger graphene oxide diffusion speed, small oxygen-containing functional group density and weak ice binding ability is weak and it is accurately separates needed size and reduction degree distribution of graphene oxide.