▎ 摘　　要

NOVELTY - Graphene composite three-dimensional nano thermal interface material comprises the thermally conductive filler that is a mixture of graphene nanoplatelets (GNP), coaxial carbon boron nitride nanotubes (CNT-BNNT), and carbon spheres (CS). USE - Graphene composite three-dimensional nano thermal interface material for thermal management. ADVANTAGE - The graphene composite three-dimensional nano thermal interface material can improve the high thermal anisotropy of the thermal composite material of the graphene sheet and improve the thermal conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a graphene composite three-dimensional nano thermal interface material, which involves immersing the GNP, CNT-BNNT and CS in acetone under high-speed shear mixing to perform ultrasonic crushing, subsequently drip into the matrix, and then mixing the dispersion and heating in a water bath with stirring, until acetone is almost removed, drying the slurry in a vacuum drying box in turn, and evacuating the slurry through a double asymmetric centrifugal speed mixer to prepare the required product.