▎ 摘　　要

NOVELTY - A graphene electrothermal film comprises 68-90 pts. wt., preferably 82 pts. wt. graphene oxide, 30-40 pts. wt., preferably 35 pts. wt. water-based fluorocarbon resin, 11-15 pts. wt., preferably 13 pts. wt. calcium dinonylnaphthalene sulfonate, 10-15 pts. wt., preferably 12 pts. wt. zinc lactate and 6-18 pts. wt., preferably 12 pts. wt. 2,5-furandicarboxylic acid. USE - Graphene electrothermal film (claimed). ADVANTAGE - The graphene electrothermal film has excellent bending resistance, increased conductivity, enhanced heat conducting performance, improved crack resistance, high strength, strong adhesion, small leakage current and reduced resistance change rate, and is prepared by simple process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of graphene electrothermal film, which involves (1) mixing zinc lactate with graphene oxide and calcining at 140-160 degrees C for 1-2 hours, cooling to 0-10 degrees C for 10-20 hours, grinding, sieving to 60-80 mesh, mixing with 100-200 pts. wt. water and heating with stirring at 40-60 degrees C to obtain mixed slurry, (2) mixing aqueous fluorocarbon resin with 40-60 pts. wt. water and heating with stirring at 50-65 degrees C to obtain aqueous fluorocarbon resin slurry, (3) mixing mixed slurry with calcium dinonylnaphthalene sulfonate, heating with stirring at 90-95 degrees C for 10-20 minutes and leaving the mixture still at -25--5 degrees C for 10-20 hours to obtain mixture, (4) mixing the mixture with 2,5-furandicarboxylic acid, heating with stirring at 120-135 degrees C for 30-40 minutes, and leaving still at -40--25 degrees C for 1-2 hours, (5) heating the mixture at 200 degrees C at rate of 5-10 degrees C/minute, and cooling to 100 degrees C at rate of 10-20 degrees C/minute for 10-20 minutes, heating at 800 degrees C at rate of 10-20 degrees C/minute, cooling to 500 degrees C at rate of 20-30 degrees C/minutes for 10-20 minutes, increasing the temperature to 1500 degrees C at rate of 10-20 degrees C/minute under inert gas atmosphere, and heat-preserving for 20-30 minutes to obtain aerogel film, and (6) pressing aerogel film under pressure of 5-75 MP.