▎ 摘　　要

NOVELTY - Preparation of thermally curable polyethylene terephthalate/graphene thermally-conductive film, involves (S1) preparing graphene heat-dissipating slurry by (S11) grinding graphene quantum dots, graphene and solvent and ultrasonically shearing, (S12) adding urea-formaldehyde resin, curing agent and carbon nanotubes to composite slurry material, stirring, (S13) adding thermally-conductive metal powder, antifoaming agent, antioxidant, organic monomer and crosslinking agent to obtained initial product of graphene heat-dissipating slurry, stirring and uniformly mixing to obtain graphene heat-dissipating slurry, (S2) carrying out corona treatment of polyethylene terephthalate, (S3) adding initiator to graphene heat-dissipating slurry, coating the mixed slurry on corona-treated polyethylene terephthalate film, (S4) curing, drying, shrinking and deforming, slowly increasing the temperature, leaving still, dripping to room temperature and then trimming the surface to obtain final product. USE - Method for preparing thermally curable polyethylene terephthalate/graphene thermally-conductive film. ADVANTAGE - The method effectively reduces the condensation between graphenes by adding graphene quantum dot to polyethylene terephthalate/graphene thermally-conductive film, and effectively avoids self-agglomeration of graphene by immediately isolating the graphene by polymer molecules or polymer monomers. DETAILED DESCRIPTION - The graphene heat-dissipating slurry is composed of 6-12 pts. wt. graphene, 50-70 pts. wt. urea-formaldehyde resin, 12-30 pts. wt. graphene quantum dots, 2-5 pts. wt. thermally-conductive metal powder, 3-6 pts. wt. carbon nanotubes, 12-24 pts. wt. solvent, 5-8 pts. wt. curing agent, 12-16 pts. wt. antifoaming agent, 1-5 pts. wt. antioxidant, 50-70 pts. wt. organic monomer and 1-5 pts. wt. crosslinking agent. The step (S11) comprises ultrasonically shearing at ultrasonic power of 1000-1200 W for 40-60 minutes. The step (S12) comprises stirring at 1000-1200 rpm for 2-4 hours. The step (S13) comprises stirring at 1200-1500 rpm for 2-3 hours. The step (S2) comprises carrying out corona treatment of polyethylene terephthalate with thickness of 30 mu m using corona machine. The step (S3) comprises adding initiator to graphene heat-dissipating slurry in an amount of 0.1-1 wt.% of organic monomer, coating the mixed slurry on corona-treated polyethylene terephthalate film by bench coater with a blade height of 10-50 mm. The step (S4) comprises curing the coated polyethylene terephthalate film in an oven at oven temperature of 60-85 degrees C for 1-3 hours, drying at a low temperature of less than 25 degrees C and greater than 80 RH in a high-humidity environment for 1.0-2.0 hours, slowly increasing the temperature at 100-200 degrees C, leaving still for 1.0-3.0 hours, dripping to room temperature and then trimming the surface.