▎ 摘　　要

NOVELTY - An inorganic base, deionized water and organic solvent are uniformly mixed. A surfactant is added to mixture and mixed. Expanded graphite is added to mixture, stirred and ultrasonically dispersed. Mixture is transferred to reactor and treated. Expanded graphite dispersion is removed from reactor, washed, neutralized, separated and dried, to obtain graphene oxide powder. An aqueous solution of cationic copolymer of quaternary ammonium salt is added to graphene oxide powder and ultrasonically dispersed, to obtain stable aqueous dispersion containing graphene oxide. USE - Preparation of stable aqueous dispersion of graphene oxide used for thin film capacitor, adsorptive separation material and polymer enhancement. ADVANTAGE - The method enables preparation of stable aqueous dispersion of graphene oxide having excellent storage stability within short period of time. DETAILED DESCRIPTION - An inorganic base, deionized water and organic solvent are uniformly mixed. A surfactant is added to mixture and mixed. Expanded graphite is added to mixture, stirred and ultrasonically dispersed. Ultrasonically dispersed mixture is transferred to reactor and treated at predetermined temperature and pressure. Expanded graphite dispersion is removed from reactor, washed, neutralized to pH of 9-12, separated by filtration and dried, to obtain graphene oxide powder. An aqueous solution of cationic copolymer of quaternary ammonium salt is added to graphene oxide powder and ultrasonically dispersed, to obtain stable aqueous dispersion containing graphene oxide.