▎ 摘　　要

NOVELTY - Preparation of graphene/polyacrylate-containing silicon hyperbranched aqueous polyurethane multicomponent composite emulsion involves obtaining hydroxyl group-containing ethylenediamine oxide graphene/polyacrylate solution, cooling, neutralizing system containing hydrophilic group diol and high-speed homogenization emulsifier, emulsifying for 3-5 minutes and vacuum-distilling to remove acetone. USE - Preparation of graphene/polyacrylate-containing silicon hyperbranched aqueous polyurethane multicomponent composite emulsion (claimed). DETAILED DESCRIPTION - Preparation of graphene/polyacrylate-containing silicon hyperbranched aqueous polyurethane multicomponent composite emulsion involves stirring graphite powder, sodium nitrate and 98 %mass concentrated sulfuric acid under ice-water bath for 1-5 minutes, gradually adding potassium permanganate, stirring for 1-1.2 hours, heat-preserving at 30-40 degrees C for 1-2 days, gradually adding preset amount of deionized water for dilution, continuously stirring, adding 30% hydrogen peroxide solution, stirring, adding dilute hydrochloric acid solution for washing, precipitating, removing supernatant, repeatedly washing using large amount of deionized water, centrifuging, precipitating, ultrasonically processing, obtaining graphene oxide dispersion, freeze-drying or vacuum drying at 30-50 degrees C, redispersing dried graphene oxide in N,N-dimethylformamide as solvent, ultrasonically stripping for more than 2 hours, obtaining graphene oxide-dimethyl formamide dispersion, rapidly mixing with ethylenediamine at room temperature and inert gas protection atmosphere for 24-26 hours, adding butyl alcohol with ethylenediamine in the molar ratio of 48-50 hours, obtaining dimethyl formamide dispersion, reacting diisocyanate and dihydric alcohol hydrophilic chain extender at 60-90 degrees C for 1-4 hours, cooling under ice bath to 0 degrees C or less, gradually adding solution of dihydroxy secondary amine in dimethyl formamide, completely reacting for 1-2.5 hours by heating at 60-90 degrees C, obtaining polyhydroxy hyperbranched polyurethane, reacting diisocyanate, oligomers of diols and small molecules of hydroxyl silicon at 70-90 degrees C for 1-4 hours under inert gas protection, adding small molecule chain extender, reacting at 70-90 degrees C for 0.5-5 hours, adding 1-3 drops of catalyst, adding preset amount of acetone to reduce the viscosity of the system, adding polyhydroxy hyperbranched polyurethane, reacting at 60-100 degrees C for 1-5 hours, obtaining silicon-containing hyperbranched polyurethane prepolymer, mixing dimethyl formamide dispersion of ethylenediamine oxide graphene with methyl methacrylate in the mass ratio of 1:1, adding butyl acrylate compound monomer, reacting at 60-80 degrees C for 2-4 hours, adding hydroxyl group-containing acrylate monomer mixed with initiator such that the content of initiator is 0.1-0.5% with respect to total amount of hydroxyl group-containing acrylate monomer, continuously reacting for 1-3 hours, obtaining hydroxyl group-containing ethylenediamine oxide graphene/polyacrylate solution, cooling to 30-40 degrees C, neutralizing system containing hydrophilic group diol and high-speed homogenization emulsifier, emulsifying for 3-5 minutes and vacuum-distilling to remove acetone. The amount of distilled water is 30-40%. The amount of ethylenediamine is equal to remaining isocyanate groups. The molar ratio of oligomer diol, small molecule chain extender with respect to diisocyanate is 1:1-3:3-7. The content of small molecule hydroxyl silicon is 1-7 %mass with respect to total content of hyperbranched polyurethane.