▎ 摘　　要

NOVELTY - Preparing graphene modified polyurethane adhesive involves dispersing 0.5-1 pts. wt. of graphene oxide uniformly in 10 pts. wt. of absolute ethanol. The 20 pts. wt. of polyisocyanate is mixed with the graphene oxide dispersion, poured into a three-necked flask, and stirred for 24 hours in a constant temperature water bath at 80-85 degrees C to prepare a much isocyanate-oxidized graphene mixed liquid. The 25 pts. wt. of triethanolamine and 30 pts. wt. of sodium isethionate is dispersed with 33 pts. wt. of n-decane, stirred uniformly, poured into a three-necked flask, put into a constant temperature oil bath at 200-210 degrees C, and turn stirring, and the speed is 1000 revolutions/minute. The 0.5 pts. wt. of sodium metal is added to the three-necked flask. USE - Method for preparing graphene modified polyurethane adhesive. ADVANTAGE - The method enables to prepare graphene modified polyurethane adhesive, that has high graphene content, good dispersibility, is not easy to agglomerate, is environmentally friendly and antibacterial, and greatly improves the performance and storage stability of the binder. DETAILED DESCRIPTION - Preparing graphene modified polyurethane adhesive involves dispersing 0.5-1 pts. wt. of graphene oxide uniformly in 10 pts. wt. of absolute ethanol. The 20 pts. wt. of polyisocyanate is mixed with the graphene oxide dispersion, poured into a three-necked flask, and stirred for 24 hours in a constant temperature water bath at 80-85 degrees C to prepare a much isocyanate-oxidized graphene mixed liquid. The 25 pts. wt. of triethanolamine and 30 pts. wt. of sodium isethionate is dispersed with 33 pts. wt. of n-decane, stirred uniformly, poured into a three-necked flask, put into a constant temperature oil bath at 200-210 degrees C, and turn stirring, and the speed is 1000 revolutions/minute. The 0.5 pts. wt. of sodium metal is added to the three-necked flask and reacted at 200-210 degrees C for 4.5 hours, and after the reaction is completed, cooled to 25 degrees C to obtain sulfonated glycol. The 8 pts. wt. of absolute ethanol is added to the three-necked flask, dissolve the sulfonated diol and distilled under reduced pressure to obtain a diol containing sulfonic acid group. The 60 pts. wt. of polyester polyol and 10 pts. wt. of diol containing sulfonic acid groupare weighed, poured into a three-necked flask, distilled under reduced pressure and put at a constant temperature of 65-70 degrees C. The polyisocyanate-graphene oxide mixture is poured into the three-necked flask, added 0.03 pts. wt. dibutyltin dilaurate, and stirred at 80-85 degrees C for 3 hours under constant temperature. The 70 pts. wt. of acetone and 1 pts. wt. 1,4-butanediol are weighed, poured into the three-necked flask, and stirred at 80-85 degrees C for 2 hours. The 100 pts. wt. of water is weighed, added the three-neck flask, adjustd the stirring speed to 6000 revolutions/minute and stirred for 20 minutes to obtain an emulsion. The 1 pts. wt. ethylenediamine is weighed into the emulsion, stirred the reaction at room temperature for 2 hours, and the stirring speed is 1000 revolutions/minute. The emulsion after the reaction is distilled under reduced pressure. The 0.5-1 pts. wt. thickener is weighed, and added to vacuum distillation emulsion. The 0.1-0.3 pts. wt. defoamer is added to obtain graphene modified polyurethane adhesive.