▎ 摘　　要

NOVELTY - Dispersant comprises a benzene ring and can form an anionic dispersant after hydrolysis, and the dispersant includes, but is not limited to, dodecylbenzenesulfonic acid, sodium p-toluenesulfonate, sodium benzenesulfonate, and p-hydroxybenzoic acid. USE - Dispersant for moderately reducing the viscosity of a graphene oxide slurry. ADVANTAGE - The pi bond of the benzene ring in the dispersant can promote the self-assembly of the graphene oxide micro flakes during film formation, and form a highly oriented graphene oxide film and improve the performance of the thermal conductive film. The anion in the dispersant has the function of a surfactant, can prevent the agglomeration of graphene oxide micro flakes and can oxidize the solid content of graphene. The dispersant is environmentally friendly and non-toxic harmless. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an application of the dispersant in preparing high-solid low-viscosity graphene oxide slurry, which involves adding 1-5 wt.% graphene oxide and 0-0.4 wt.% dispersant to deionized water, stirring until the slurry is uniform and viscosity is controlled to 7000-10000 millipascal-second, defoaming the slurry, using scraping knife coating manner to obtain a thickness of 2-20 mm of the slurry, drying the slurry to obtain dried graphene oxide film of thickness 40-600 mu m, putting the graphene oxide film into a carbonization furnace at 1000-1500 degrees C for 60-180 minutes for pre-reduction treatment, then putting it into a high temperature graphitization furnace and keeping it at 2700-3000 degrees C for 60-180 minutes to obtain graphene heat dissipation film after sufficient graphitization, rollig the graphene heat dissipation film to a density of 1.8 g/cm3 by using a roller press to obtain a highly thermally conductive graphene heat-dissipating film having a thickness of 80-150 mu m, thermal diffusion coefficient of 800-1000 mm2/second, and thermal conductivity of 1000-1400 Watts per meter-Kelvin.