▎ 摘　　要

NOVELTY - Graphene modified water-based polyurethane adhesive comprises 10-15 parts mass graphene dispersion, 5-15 parts mass diisocyanate, 1-5 parts mass polyol, 5-10 parts mass hydrophilic chain extender, 0.1-0.2 parts mass catalyst, 1-4 parts mass neutralizing agent and 50-150 parts mass organic solvent. USE - The graphene modified aqueous polyurethane adhesive is useful for shoe material, leather and other material bonding fields. The shoe material is used for manufacturing shoes. ADVANTAGE - The graphene modified aqueous polyurethane adhesive exhibits good initial viscosity, peeling strength, hydrolysis resistance and aging resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the graphene modified water-based polyurethane adhesive comprising (a1) adding calcium carbide and hexabromobenzene in a ball mill tank, adding 100 ml absolute ethanol for every 10-15g of calcium carbide and hexabromobenzene, and performing wet ball milling, and stirring the milled solution at a constant temperature of 70-90℃ for 24 hours, and drying in a blast drying oven at 60-80℃, (a2) grinding the dried sample, placing it in a tube furnace, and calcining it for 2 hours under an argon atmosphere at 380-420℃ to remove excess hexabromobenzene, (a3) washing the calcined sample successively with dilute nitric acid, deionized water and ethanol to remove unreacted calcium carbide, reaction by-product calcium bromide and trace hexabromobenzene, centrifuging to obtain a black precipitate, and placing the black precipitate in a blast drying oven to dry at 60-80℃ to obtain a graphene powder, (b) adding 0-0.12 parts mass graphene powder into 10 parts mass N,N-dimethylformamide, ultrasonically dispersing for 1 hour at a power of 1000 W, and obtaining uniformly dispersed graphene dispersion liquid, (c) adding 5-15 parts mass diisocyanate, adding 1-5 parts mass polyol, and reacting for 1 hour under nitrogen protection, adding 10 parts mass graphene dispersion, continue the constant temperature reaction for 2 hours, adding 5-10 parts mass hydrophilic chain extender, stirring evenly, adding 0.1-0.2 parts mass catalyst, and reacting at 75℃ for 1 hours, after the reaction is completed and cooling, adding 50-150 parts mass organic solvent to reduce viscosity, adding 1-4 parts mass neutralizing agent, and reacting at 40℃ for 30 minutes, stirring rapidly and add deionized water to disperse, and finally evaporating the organic solvent under reduced pressure to obtain the product.