▎ 摘　　要

NOVELTY - Preparation of graphene/polyurethane-epoxy resin composite anticorrosive coating involves adding hydroxy acrylic resin, xylene and hexamethylene diisocyanate to stainless-steel container, adding aqueous solution of OP-10 emulsifier (alkylphenol polyoxyethylene ether-10), dispersing to obtain shell-phase monomer pre-emulsion, adding water and OP-10 emulsifier (alkylphenol polyoxyethylene ether-10) to reaction vessel, heating, adding nuclear phase monomer pre-emulsion containing hydroxyethyl methacrylate, methyl methacrylate and butyl acrylate, mixing, adding initiator aqueous solution, reacting, dripping nuclear phase monomer pre-emulsion and initiator aqueous solution, reacting to obtain core phase emulsion, dripping shell-phase monomer pre-emulsion to core phase emulsion, heat preserving, adjusting pH and filtering to obtain polyurethane-epoxy resin core-shell emulsion, dispersing polyurethane-epoxy resin core-shell emulsion, adding sulfonic acid-type graphene and stirring. USE - Preparation of graphene/polyurethane-epoxy resin composite anticorrosive coating. ADVANTAGE - The method effectively improves anticorrosive performance of composite coating due to use of sulfonic acid-type graphene and decreases corrosion current density, so that it exhibits excellent metal corrosion resistance. DETAILED DESCRIPTION - Preparation of graphene/polyurethane-epoxy resin composite anticorrosive coating involves adding graphene and sodium nitrate to reaction vessel, placing in ice water bath at 0 degrees C, adding concentrated sulfuric acid, stirring, dripping potassium permanganate at rate of 0.06-0.07 g/minute, transferring to reaction vessel to constant temperature water bath, dripping deionized water to react, adding hydrogen peroxide aqueous solution until the reaction solution turns bright yellow, centrifuging until pH of the supernatant is neutral, vacuum drying to obtain graphene oxide, dissolving graphene oxide in deionized water to obtain 5 mg/mL graphene oxide solution, adding 500-550 mg sodium amino polyether sulfonate to graphene oxide solution, adjusting pH to 9-10 with sodium hydroxide, stirring, heating to react, reducing temperature to room temperature, filtering, washing with deionized water to neutrality, adding 0.5-0.6 g sodium borohydride and 1-2 mL ammonia to every 100 mL graphene oxide solution, heating, stirring to react, filtering, vacuum drying filtered material to obtain sulfonic acid-type graphene, adding bisphenol A epoxy resin and tetrabutylammonium bromide to reaction vessel, dripping acrylic acid within 1 hour, heat preserving to obtain acrylic acid modified epoxy resin intermediate, adding hydroxyethyl methacrylate, acrylic acid modified epoxy resin intermediate, methyl methacrylate and butyl acrylate to stainless-steel container, adding aqueous solution OP-10 emulsifier (alkylphenol polyoxyethylene ether-10), dispersing in high-speed disperser, stirring to obtain nuclear phase monomer pre-emulsion, adding hydroxy acrylic resin, xylene and hexamethylene diisocyanate to stainless-steel container, adding aqueous solution of OP-10 emulsifier (alkylphenol polyoxyethylene ether-10), dispersing in high-speed disperser to obtain shell-phase monomer pre-emulsion, adding deionized water and OP-10 emulsifier (alkylphenol polyoxyethylene ether-10) to reaction vessel, heating, stirring until the emulsion is completely dissolved, adding 1/5 of the nuclear phase monomer pre-emulsion, mixing, slowly adding 1/4 of initiator aqueous solution, reacting, dripping remaining amount of nuclear phase monomer pre-emulsion and initiator aqueous solution, reacting to obtain core phase emulsion, slowly dripping shell-phase monomer pre-emulsion to core phase emulsion, heat preserving, lowering temperature to remove residual monomers, adjusting pH to 7-8 and filtering to obtain polyurethane-epoxy resin core-shell emulsion, dispersing polyurethane-epoxy resin core-shell emulsion, slowly adding 10-15 g sulfonic acid-type graphene to 100 g polyurethane-epoxy resin core-shell emulsion and stirring for 1 hour.