▎ 摘　　要

NOVELTY - A graphene foam-nylon 6 high-thermal-conductivity composite nanomaterial comprises 90-99 wt.% nylon 6 as matrix material and 1-10 wt.% graphene foam as thermal-conductivity filler. The graphene foam in the nylon 6 matrix material constitutes three-dimensional fully connected network structure. The network of graphene foam in nylon 6 forms thermal bridge of composite material. USE - Graphene foam-nylon high-thermal-conductivity composite nanomaterial is used for heat-radiating component for automobiles, computer and light-emitting diode. ADVANTAGE - The graphene foam-nylon composite nanomaterial has high thermal conductivity, and excellent mechanical property and processing characteristics. The graphene foam-nylon composite nanomaterial is prepared by economical method. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of graphene foam-nylon 6 high-thermal-conductivity composite nanomaterial, which involves preparing graphene foam with three-dimensional fully connected network structure by adding aqueous solution of graphene oxide with concentration of 1-10 mg/ml to hydrothermal reactor, heating at 120-180 degrees C for 6-12 hours, subjecting aqueous solution of graphene oxide to chemical reduction reaction, agglomerating graphene to form wet gel block and freeze-drying graphene wet gel block at -60 degrees C for 48 hours, mixing graphene foam and nylon 6 monomer, adding catalyst or initiator, mixing mixture at 90-120 degrees C, melting nylon 6 monomer with catalyst or initiator and penetrating molten mixture to interstices and pores of graphene foam network, vacuum treating mixture until bubbles in mixed material is removed, impregnating nylon 6 monomer with catalyst or initiator to voids of graphene foam, processing at 160-200 degrees C under nitrogen atmosphere, prepolymerizing mixed material for one hour or more to form composite prepolymer, polymerizing composite prepolymer at 240-260 degrees C for 4-10 hours under nitrogen atmosphere to form graphene nylon 6 high-thermal-conductivity composite nanomaterial, naturally cooling graphene nylon 6 high-thermal-conductivity composite nanomaterial under nitrogen atmosphere, washing and cutting composite nanomaterial.