▎ 摘　　要

NOVELTY - A graphene-based polymer thermal interface material is prepared by (1) using polyvinylidene fluoride as matrix and graphene as filler, introducing polyvinylpyrrolidone as crosslinking agent, configuring precursor solution, (2) using electrospinning technology by precursor solution to achieve uniform dispersion of graphene and building a three-dimensional structure of interconnected layers, obtaining composite fiber membrane on receiving device, (3) vacuum drying the composite fiber membrane to remove residual solvents, applying pressure on the surface of the composite fiber membrane, and making its structure more compact. USE - Graphene-based polymer thermal interface material (claimed) for electronic devices. ADVANTAGE - The graphene-based polymer thermal interface material uses graphene with large sheets and few defects as filler, polyvinylidene fluoride as matrix and polyvinylpyrrolidone as a crosslinking agent to improve the interface compatibility between graphene and polymer, thereby reducing the degree of phonon scattering. During the spinning process, the graphene is gradually deposited due to the fibers being captured by the receiving device to form a three-dimensional heat transfer structure with layers of interconnection, which facilitates the rapid transfer of phonons in the composite material and improves the heat transfer performance. The polymer thermal interface material has high thermal conductivity, and exhibits excellent electrical insulation performance. The graphene-based polymer thermal interface material is prepared by a simple process, which is economical, easy to control and suitable for large-scale industrial production.