▎ 摘　　要

NOVELTY - Preparing thermally conductive insulating graphene-boron nitride (GBN) material comprises mixing hexagonal boron nitride powder, water and ethanol under and stirring to obtain a hexagonal boron nitride solution. The obtained hexagonal boron nitride solution is subjected to ultrasonic treatment and high-temperature hydrothermal treatment to obtain boron nitride nanosheets (BNNSs) dispersion solution. The obtained BNNSs dispersion solution is centrifuged and vacuum dried to obtain BNNSs powder. The obtained BNNSs powder is dispersed in N,N-dimethylformamide solution, and mixed with the graphene suspension to obtain a mixed solution. The obtained mixed solution undergoes to stirring treatment, ultrasonic treatment, high-temperature hydrothermal treatment, centrifugation treatment, and vacuum drying treatment in sequence to obtain a graphene-boron nitride (GBN) product. USE - Method for preparing thermally conductive insulating graphene-boron nitride (GBN) material. ADVANTAGE - The method prepares the thermally conductive insulating graphene-boron nitride material in a simple, safe, and cost-effective manner with enhanced structural integrity.