▎ 摘　　要

NOVELTY - A highly thermally conductive layered graphene composite material consists of a layered structure including a reduced graphene oxide layer and an oxidized cellulose nanocrystal/epoxy layer containing a blend of oxidized cellulose nanocrystals and an epoxy resin, and has thermal conductivity of 9-30 W/m.K. The mass ratio of the reduced graphene oxide to the oxidized cellulose nanocrystals is 2:1-1:9. The mass ratio of the reduced graphene oxide to the epoxy resin is 6:1-1:15. USE - Highly thermally conductive layered graphene composite material. ADVANTAGE - The composite material has excellent thermal conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacture of highly thermally conductive layered graphene composite material, which involves adding oxidized cellulose nanocrystal aqueous dispersion to the aqueous graphene oxide dispersion, stirring to obtain oxidized cellulose nanocrystal-graphene oxide aqueous dispersion, ultrasonically treating the oxidized cellulose nanocrystal-graphene oxide aqueous dispersion, performing graphene oxide reduction treatment, centrifuging to obtain a precipitate, ultrasonically dispersing the precipitate in an organic solvent, adding epoxy resin, ultrasonically stirring, evaporating solvent to form a layered graphene film, heating, and curing.