▎ 摘　　要

NOVELTY - Release film based on flexible graphene, comprises a base material and a coating layer arranged on the base material, where the coating layer comprises 25-50 pts. wt. modified graphene composite metal powder, 20-40 pts. wt. silicone resin, 20-50 pts. wt. nano silicon dioxide fiber, 5-15 pts. wt. polyvinyl alcohol, 4-8 pts. wt. fumaric acid, 3-6 pts. wt. nano alumina powder, 2-6 pts. wt. titanium dioxide, 1-5 pts. wt. coupling agent, 1-3 pts. wt. initiator, 0.2-0.8 pts. wt. defoaming agent, 0.1-0.5 pts. wt. antioxidants, 1-2 pts. wt. cross-linking agent and 4-8 pts. wt. platinum catalyst. USE - The release film is useful for packaging, printing, screen printing, pad printing, nameplate, film switch, flexible circuit, insulating product, circuit board, laser anti-pseudo, bonding, electronic, film for sealing material, reflecting material, waterproof material, medicine, gypsum paper and sanitary paper. ADVANTAGE - The release film: is suitable in severe electromagnetic environment; has excellent heat-resistant and antistatic property, elasticity and ductility performance and prolonged service life. DETAILED DESCRIPTION - Release film based on flexible graphene, comprises a base material and a coating layer arranged on the base material, where the coating layer comprises 25-50 pts. wt. modified graphene composite metal powder, 20-40 pts. wt. silicone resin, 20-50 pts. wt. nano silicon dioxide fiber, 5-15 pts. wt. polyvinyl alcohol, 4-8 pts. wt. fumaric acid, 3-6 pts. wt. nano alumina powder, 2-6 pts. wt. titanium dioxide, 1-5 pts. wt. coupling agent, 1-3 pts. wt. initiator, 0.2-0.8 pts. wt. defoaming agent, 0.1-0.5 pts. wt. antioxidants, 1-2 pts. wt. cross-linking agent and 4-8 pts. wt. platinum catalyst. The modified graphene composite metal powder is prepared by (1) dissolving sodium borohydride and sodium hydroxide in deionized water under the protection of inert gas, nitrogen or hydrogen-argon mixed gas to obtain a reducing agent solution, where the concentrations of the sodium borohydride and sodium hydroxide are 0.5-3 M, dissolving a metal salt in the deionized water to obtain a metal salt aqueous solution with the concentration of 0.5-2 M, and separately placing the obtained reducing agent solution and metal salt aqueous solution in an ice-water bath for 10-30 minutes, where the metal salt is hydrated nickel chloride, (2) under the protection of inert gas, slowly adding the metal salt aqueous solution subjected to the ice-water bath into the equivalent volume of reducing agent solution at a rate of one drop per second and stirring for 100-200 minutes to obtain the dried product, then placing the dried product at the temperature of 550-650℃ and calcining for 1-2 hours at high temperature to obtain the metal boride, (3) carrying out hydrothermal reaction on 2-10 ml 1 mol/L modified graphene and 50 mg metal boride prepared in the resultant step at the temperature of 220℃ and 280℃ for 3-9 hours to obtain the modified graphene composite metal, and (4) heating and calcining the modified graphene composite metal at the temperature of 150-180℃ for 3-6 hours, cooling, grinding into powder and sieving with a 200-400 meshes sieve to obtain the product. An INDEPENDENT CLAIM is also included for preparing the release film based on flexible graphene, comprising (i) placing the modified graphene composite metal powder, silicone resin, nano silicon dioxide, polyvinyl alcohol, fumaric acid, nano alumina powder, titanium dioxide, a coupling agent, a cross-linking agent and a platinum catalyst into a mixer, and fully stirring for 20-40 minutes at 90-110℃ to obtain a premix, (ii) cooling the premix prepared in the resultant step to 4-8℃, adding initiator, defoaming agent and antioxidant under the condition of isolating ultraviolet rays, heating to 35-55℃, stirring for 45-90 minutes to obtain coating, and (iii) coating the resultant coating on the surface of a base material under the condition of isolating ultraviolet rays, and curing through infrared leveling and ultraviolet irradiation to obtain the final product.