▎ 摘　　要

NOVELTY - Preparing graphene-modified acrylic resin coating involves peeling walnut, and then washing with water. The washed walnut peel is dried in oven at 40-70 degrees C, and then crushed to obtain 80-100 meshes walnut powder. The walnut powder is mixed with water, allyl trimethyl ammonium chloride and 4-methoxy acetoacetate at 80-100 degrees C under reflux conditions. The obtained mixture is filtered to obtain filtrate, which is boiled at 60-70 degrees C. The obtained boiled mixture is concentrated to reduce moisture content to 15-20% to obtain walnut concentrate. The walnut powder is mixed water in ratio of 1:3. USE - Method for preparing graphene-modified acrylic resin coating (claimed). ADVANTAGE - The method enables to prepare waterproof property graphene-modified acrylic resin coating that has good flame retardant and antibacterial properties. DETAILED DESCRIPTION - Preparing graphene-modified acrylic resin coating involves peeling walnut, and then washing with water. The washed walnut peel is dried in oven at 40-70 degrees C, and then crushed to obtain 80-100 meshes walnut powder. The walnut powder is mixed with water, allyl trimethyl ammonium chloride and 4-methoxy acetoacetate at 80-100 degrees C under reflux conditions. The obtained mixture is filtered to obtain filtrate, which is boiled at 60-70 degrees C. The obtained boiled mixture is concentrated to reduce moisture content to 15-20% to obtain walnut concentrate. The walnut powder is mixed water in ratio of 1:3. The walnut powder is mixed with 5 wt.% allyl trimethyl ammonium chloride and 2 wt.% 4-methoxy acetoacetate. 60mg graphene, 50mL N-methylpyrrolidone, 20g tetrabutylammonium hydroxide and 0.2g tetrabutylammonium hydroxide are mixed, and then subjected to ultrasonic treatment for 30 minutes. The obtained mixture is centrifuged at 2000 rotations per minute to obtain graphene dispersion. 80g water, 0.45g sodium dodecylbenzenesulfonate, 0.35g fatty alcohol polyoxyethylene ether and 0.4g acrylic acid are added in 250ml three-necked flask equipped with stirrer, thermometer and condenser. The reaction mixture is heated at 60 degrees C with stirring for 40 minutes, and then added with monomer A for emulsifying for 60 minutes. The mixture is heated at 70 degrees C, and then 80 degrees C. The obtained mixture is added with 7g water and 8.4g potassium persulfate solution with stirring for 2 hours. The obtained mixture is added with 0.53g walnut concentrate and 0.23g water repellent with stirring for 4 hours to obtain nuclear layer emulsion. The monomer A is prepared by mixing 4g butyl acrylate, 4g methyl methacrylate and 10.5g ethyl acrylate. The nuclear layer emulsion is added with 11.2g monomer B and 11.2g potassium persulfate dissolved in 9g water, and then heated at 80 degrees C for 2 hours. The obtained mixture is added with binding agent A, 0.25g sodium 3-nitrobenzene sulfonate, 0.225g fatty alcohol polyoxyethylene ether, 0.7g graphene dispersion, 0.6g octaphenylcyclotetrasiloxane and 0.6g ammonium polyphosphate with stirring for 60 minutes. The reaction mixture is heated at 70 degrees C for 1 hour at 7-8 pH to obtain graphene-modified acrylic resin coating.