▎ 摘　　要

NOVELTY - The preparation of highly dispersed graphene anticorrosive coating involves ultrasonically dispersing graphite oxide in water to obtain uniform suspension solution, adding sodium hydroxide and sodium chloroacetate, ultrasonically processing in a water bath, neutralizing using dilute hydrochloric acid solution, converting hydroxy and epoxy groups on graphene oxide into thio groups, washing, and drying to obtain carboxylated graphene, dissolving carboxylated graphene in water, adding to reactor, adding modifying agent, washing, and vacuum drying to obtain modified graphene oxide. USE - Preparation method of highly dispersed graphene anticorrosive coating. ADVANTAGE - The method enables preparation of coating with high dispersion of graphene and excellent corrosion resistance. DETAILED DESCRIPTION - The preparation method of highly dispersed graphene anticorrosive coating involves (1) ultrasonically dispersing graphite oxide in water for 10-30 minutes to obtain uniform suspension solution, adding sodium hydroxide and sodium chloroacetate, ultrasonically processing in a water bath for 1-2 hours, neutralizing using dilute hydrochloric acid solution, converting hydroxy and epoxy groups on graphene oxide into thio groups, washing with deionized water until neutral, and vacuum drying at 50-80 degrees C to obtain carboxylated graphene, where the weight ratio of graphite oxide, water, sodium hydroxide, and sodium chloroacetate is 1:1000:(40-50):(45-60) (2) dissolving carboxylated graphene prepared in the step (1) in water, adding to an oil bath reactor, adding modifying agent, reacting at 60-90 degrees C for 30-90 minutes, washing with deionized water, and vacuum drying at 50-80 degrees C to obtain modified graphene oxide, where the mass ratio of carboxylated graphene and modifying agent is 1:(0.05-0.2), (3) mixing modified graphene oxide and porous resin according to the mass ratio of 1:(5-20), and loading modified graphene oxide and crosslinking agent on porous resin by homogeneous mixing to obtain porous resin composite material, and (4) adding the porous resin composite material obtained in the step (3) to the resin coating, stirring in a high pressure tank, mixing for 30-120 minutes, introducing supercritical carbon dioxide to form a homogeneous gas-liquid dispersion layer inside the coating system, and uniformly dispersing the porous resin composite material inside the coating by electromagnetic vibration so as to achieve indirect dispersion of graphene.