▎ 摘　　要

NOVELTY - Preparation of highly thermally conductive flexible graphene film, involves (i) dispersing 0.6-3.2 wt.% graphene powder in 96.8-99.4 wt.% deionized water, stirring and ultrasonically processing for evenly distributing to obtain slurry, (ii) adding aqueous ammonia and stirring for 0.5-1 hour, adjusting the pH of slurry to 9-11, (iii) adding a reducing agent hydroxylamine hydrochloride to reduce the graphene oxide, (iv) coating the reduced graphene paste on a dry film, and stripping, (v) carrying out high-temperature hot-pressing and sintering on reduced graphene film to graphitize. USE - Preparation of highly thermally conductive flexible graphene film (claimed). DETAILED DESCRIPTION - Preparation of highly thermally conductive flexible graphene film, involves (i) dispersing 0.6-3.2 wt.% graphene powder in 96.8-99.4 wt.% deionized water, stirring and ultrasonically processing for evenly distributing to obtain slurry, (ii) adding aqueous ammonia and stirring for 0.5-1 hour, adjusting the pH of the slurry to 9 to 11, (iii) adding a reducing agent hydroxylamine hydrochloride to reduce the graphene oxide, (iv) coating the reduced graphene paste on a dry film, and stripping, (v) carrying out high-temperature hot-pressing and sintering on reduced graphene film to graphitize, and obtaining highly thermally conductive flexible graphene film.