▎ 摘　　要

NOVELTY - Toughening graphene film preparation involves loading graphite diluted nanobelt with a surfactant, and then dispersing the graphene nanobelts in the solution to prepare a solution. The obtained metal foil having graphene-based nanobelt is placed in a chemical vapor deposition atmosphere furnace at 900-1070 degrees C for 10-60 minutes in a constant temperature zone. The metal foil is quickly removed from the constant temperature zone and then cooled at room temperature. The metal foil substrate is etched in an etching solution, where the etching solution is prepared by mixing ammonium thiosulfate. USE - Method for preparing toughening graphene film (claimed) used in transparent film electrode, thin film electronic touch screen, high sensitivity sensor, transistor and flexible thin film electronic device. ADVANTAGE - The method prepares toughening graphene film in a simple, cost-effective and eco-friendly manner on large-scale. The prepared toughening graphene film has high mechanical strength, excellent electrical conductivity, transparency and thermal conductivity. DETAILED DESCRIPTION - Toughening graphene film preparation involves loading graphite diluted nanobelt with a surfactant, and then dispersing the graphene nanobelts in the solution to prepare a solution. The obtained metal foil having graphene-based nanobelt is placed in a chemical vapor deposition atmosphere furnace at 900-1070 degrees C for 10-60 minutes in a constant temperature zone. The metal foil is quickly removed from the constant temperature zone and then cooled at room temperature. The metal foil substrate is etched in an etching solution, where the etching solution is prepared by mixing ammonium thiosulfate, butylated hydroxytoluene and deionized water. The metal foil is completely dissolved by etching. The graphene nanobelt in-situ toughened graphene film is transferred into butanol aqueous solution to give the graphene nanometer tape in-situ toughening graphene film. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic transmission electron microscopic image of the toughening graphene film. (Drawing includes non-English language text).