▎ 摘　　要

NOVELTY - Preparing magnetic graphene oxide surfactant comprises (1) mixing the graphene oxide, the iron source and the aqueous ammonia-ammonium nitrate solution and reacting to obtain magnetic graphene oxide, (2) dispersing the magnetic graphene oxide in deionized water, and adding 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and polyethylene glycol to react to obtain magnetic graphene oxide wrapped with polyethylene glycol, and (3) adding the polyethylene glycol-wrapped magnetic graphene oxide and surfactant into solvent to react to obtain the magnetic graphene oxide surfactant. USE - The method is useful for preparing magnetic graphene oxide surfactant. ADVANTAGE - The method: can carry out graft modification of graphene oxide and surfactant under relatively mild conditions; can not only emulsify oil and water; quickly breaks demulsification under the condition of external magnetic field; and has certain adsorption effect on metal ions in oilfield produced fluid. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for magnetic graphene oxide surfactant obtained by the preparation method.