▎ 摘　　要

The interconnected 3D graphene network framework wrapping homogeneous dispersion of nano-Al2O3 particles was successfully designed in the phenolic resin-based ternary nanocomposite. Firstly, the solvothermal method was used to prepare graphene hybrid with highly dispersive nano-Al2O3 particles in a mixed solvent of ethanol absolute and deionized water. Nano-Al2O3 particles were homogeneously dispersed in the 3D graphene network framework when the volume ratio of ethanol absolute and deionized water was 1:1. Then the phenolic resin monomer was impregnated into the graphene hybrid by the appropriate heating process. Finally, the nano-Al2O3 particles/3D graphene/phenolic resin ternary nanocomposite was fabricated by in-situ polymerization. The homogeneous dispersion of nano-Al2O3 particles was well maintained in the nanocomposite. The nanocomposite possesses high mechanical properties. The nanocomposite leads to 35.02% and 31.50% increases in hardness and compressive strength than that directly dispersed nano-Al2O3 particles in the phenolic resin, respectively.