▎ 摘　　要

NOVELTY - Preparing functionalized graphene-reinforced aqueous polyurethane anti-corrosive coating comprises ultrasonically dispersing the graphene oxide in acetone, adding isophorone diisocyanate (IPDI), mechanically stirring, adding N,N-dimethylethanolamine (DMEA), heat refluxing, washing and drying to obtain functionalized graphene oxide powder; dispersing the obtained functionalized graphene oxide powder and SDBS in certain concentration of ethanol solution, adding aqueous polyurethane, simple mechanical stirring, coating on protected metal surface by brushing or spraying; placing coated coating at room temperature for 1-5 hours, placing it in oven, and drying. The covalent grafting method not only solves the problem of agglomeration between graphene sheets, also solves the problem of compatibility between inorganic nanoparticles and high-molecular polymers; by non-covalent grafting method further solves the problem of dispersibility of functionalized graphene in aqueous coatings. USE - The anti-corrosive coating is useful for applying to metal surface to be protected by brushing or spraying. ADVANTAGE - The anti-corrosive coating: has high anticorrosion efficiency. DETAILED DESCRIPTION - Preparing functionalized graphene-reinforced aqueous polyurethane anti-corrosive coating comprises ultrasonically dispersing the graphene oxide in acetone, adding isophorone diisocyanate (IPDI) at certain temperature, mechanically stirring for 10-24 hours, adding N,N-dimethylethanolamine (DMEA), heat refluxing, washing and drying to obtain functionalized graphene oxide powder; dispersing the obtained functionalized graphene oxide powder and SDBS in certain concentration of ethanol solution, adding aqueous polyurethane, simple mechanical stirring, coating on protected metal surface by brushing or spraying; placing coated coating at room temperature for 1-5 hours, placing it in oven, and drying. The covalent grafting method not only solves the problem of agglomeration between graphene sheets, also solves the problem of compatibility between inorganic nanoparticles and high-molecular polymers. by non-covalent grafting method further solves the problem of dispersibility of functionalized graphene in aqueous coatings. The electrochemical workstation test and the salt salt mist and results show that the anti-corrosion effect of the modified anti-corrosion coating is greatly improved compared with pure aqueous polyurethane.