▎ 摘　　要

NOVELTY - The method involves preparing (Step 1) graphene oxide powder into a graphene oxide dispersion liquid with a concentration of 0.05-0.09 mg/ml. The graphene oxide dispersant is sprayed (Step 2) on the base material. A film of graphene oxide is dried and formed to obtain a first product. The silver paste strips are printed (Step 3) on both sides of the film along the length direction of the substrate to form two first silver paste strip, and continued to print between the two first silver paste strips, and drying. The copper foil is covered (Step 4) on the two-second silver paste strip in the second step product, and a coating film is covered on the upper surface of a copper foil by a pressure of 5-20 MPa to obtain the finished product of the flexible graphene electric heating film. USE - Method for preparing flexible graphene electrothermal film, which is used as electric heating element, preferably graphene far infrared healthy therapy product. ADVANTAGE - The flexible graphene electro-thermal film has improved safety performance, and reduces the resistance of the whole graphene film, realizing low-voltage use. The heat generated by the first silver paste strip can improve the safety performance of the corresponding product, so as to reduce the resistance. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic flow diagram illustrating the preparation process of a preparation technique of flexible graphene electrothermal film. (Drawing includes non-English language text). Step for preparing graphene oxide powder into a graphene oxide dispersion liquid with a specific concentration (Step 1) Step for spraying the graphene oxide dispersant on the base material (Step 2) Step for printing the silver paste strips on both sides of the film along the length direction of the substrate to form two first silver paste strip (Step 3) Step for covering the copper foil on the two-second silver paste strip in the second step product (Step 4)