▎ 摘　　要

Thermally strong and multifunctional cardanol based nanocomposite was synthesized using graphene oxide as nanofiller. Benzoxazine monomer (BZ) was synthesized by using bio-product cardanol, p-Toluidine and formaldehyde. Graphene oxide (GO) was mixed with prepared BZ monomer at different weight percentage and copolymerized with diglycidyl ether of bisphenol-A at different loading level to make copolymer. BZ monomer was characterized by FT-IR, and NMR. GO was characterized by FT-IR, XRD, SEM and TEM. Thermal and electrical properties of Polybenzoxazine-graphene oxide/epoxy (PBZG-EP) nanocomposites were tested. The electrical properties of PBZG-EP were significantly improved compared with those of pure epoxy (EP) matrix. The dielectric strength of PBZG-EP was higher than that of pure epoxy matrix, due to interfacial polarization and intermolecular hydrogen bonding between the GO and the polymer which enhances the dielectric strength of PBZG-EP nanocomposite from 6.6 to 8.16MV/m.