▎ 摘　　要

NOVELTY - Preparing graphene polyurethane composite plastic involves passing carbon nanotubes sequentially through the coupling agent, putting mixed liquid containing graphene and toluene diisocyanate in the spray tube, and entering the receiving device containing the hydroxyl-terminated polytetrahydrofuran and the catalyst to react to produce a polyurethane composite plastic with uniformly dispersed graphene. The graphene is added to the xylene solvent, dispersed ultrasonically, toluene diisocyanate is added to perform magnetic stirring until the mixture is uniform, and prepared mixed solution. The spray tube of the spray dryer is divided into three stages of feeding ports, the first stage is carbon nanotubes, the second stage is KH550 coupling agent, and the third stage is the mixed liquid prepared and xylene solution and catalyst re added with hydroxyl-terminated polytetrahydrofuran inside. USE - Method for preparing graphene polyurethane composite plastic for sports equipment. ADVANTAGE - The method enables to prepare graphene polyurethane composite plastic, where tensile strength of the composite material is significantly improved, and preparation process is simple, has low cost, excellent performance, and widely applied in lightweight sports equipment. DETAILED DESCRIPTION - Preparing graphene polyurethane composite plastic involves passing carbon nanotubes sequentially through the coupling agent, putting mixed liquid containing graphene and toluene diisocyanate in the spray tube, and entering the receiving device containing the hydroxyl-terminated polytetrahydrofuran and the catalyst to react to produce a polyurethane composite plastic with uniformly dispersed graphene. The graphene is added to the xylene solvent, dispersed ultrasonically, toluene diisocyanate is added to perform magnetic stirring until the mixture is uniform, and prepared mixed solution. The spray tube of the spray dryer is divided into three stages of feeding ports, the first stage is carbon nanotubes, the second stage is KH550 coupling agent, and the third stage is the mixed liquid prepared and xylene solution and catalyst re added with hydroxyl-terminated polytetrahydrofuran inside. The carbon nanotube in the atomizer is quickly passed through the coupling agent layer under a certain pressure, and then enters the mixed liquid layer, the liquid is atomized into mixed particles, and falls into the receiving device to participate in the reaction, and the graphene/polyurethane composite is prepared plastic.