▎ 摘　　要

NOVELTY - Preparation of multilayer self-fused graphene heat conducting film involves (S1) adding reducing sugar to graphene oxide slurry to obtain pre-reduced graphene oxide slurry, (S2) pouring substrate in slurry, coating to form film, drying to obtain pre-reduced graphene oxide film, (S3) stacking the film in multiple layers, pressurizing and reducing, graphitizing under argon atmosphere to obtain graphitized film, and (S4) rolling the graphitized film. USE - Preparation of multilayer self-fused graphene heat conducting film (claimed). ADVANTAGE - The aldehyde and ketone groups of the reducing sugar undergo redox reaction with graphene oxide, and reduced under pressure, which can generate gas escape channel during the reduction of graphene oxide, and avoids damage of film structure and unevenness of film surface caused by concentrated and violent discharge of the gas generated during the reduction process. The in-situ reduction reduces the unevenness of the film surface caused by severe expansion during the reduction process, and avoids the loss of thermal conductivity caused by folds after the large bubbling roller pressure. The oxidation product of reducing sugar form hydrogen bond with graphene oxide, which enhances the bonding force between graphene oxide sheet to ensures the high thermal conductivity of the film.