▎ 摘　　要

NOVELTY - Preparing amine-reinforced graphene film comprises e.g. (i) adding oxidized graphene solution, water-soluble amine cross-linking agent and soluble reducing agent to the flat hollow reactor; the water-soluble amine-based crosslinking agent is ethylenediamine, propylenediamine, butanediamine, and/or p-phenylenediamine; the water-soluble reducing agent is ascorbic acid, sodium ascorbate, and/or sodium sulfide; (ii) heating the flat hollow reactor, carrying out the reduction and assembly of the graphene oxide to obtain a flat-shaped amino-reinforced graphene hydrogel; heating; and (iii) drying. USE - The method is useful for preparing amine-reinforced graphene film (claimed). ADVANTAGE - The method is simple, has mild condition and excellent mechanical property. DETAILED DESCRIPTION - Preparing amine-reinforced graphene film comprises (i) adding oxidized graphene solution, water-soluble amine cross-linking agent and soluble reducing agent to the flat hollow reactor; the water-soluble amine-based crosslinking agent is ethylenediamine, propylenediamine, butanediamine, diethylenetriamine, triethylene tetramine, tetraethylene pentamine, ammonia, polyallylamine and/or p-phenylenediamine; the water-soluble reducing agent is ascorbic acid, sodium ascorbate, sodium citrate, hydroiodic acid, hydrobromic acid, sodium bisulfite and/or sodium sulfide; (ii) heating the flat hollow reactor, carrying out the reduction and assembly of the graphene oxide to obtain a flat-shaped amino-reinforced graphene hydrogel; heating at 60-95 degrees C; and (iii) drying the amino-reinforced graphene hydrogel. INDEPENDENT CLAIMS are also included for: (1) preparing amine-reinforced graphene film as mentioned above; (2) preparing nitrogen doped graphene film comprising carrying out heat treatment of the amino-reinforced graphene film; and (3) preparing nitrogen doped graphene film as mentioned above