▎ 摘　　要

Composite filler of graphene/Nickel (GN) was prepared by in-situ reduction of nickel ions in basic solution of ethanol and water. Graphene layers in GN were decorated by flower-shaped nickel particles in the size of around 100 nm and homogeneous films of ternary composites were prepared from polybenzoxazine and GN. It was found that only 1 wt% of GN could increase the electrical conductivity from 1.57 x 10(-12) S/cm (1 Hz) to 3.10 x 10(-4) S/cm (1 Hz). As a result, the composites possessed high electromagnetic interference shielding effectiveness (EMI SE) in X-band range and showed an absorption-dominant mechanism. Addition of 3 wt% of GN could meet the requirement of commercial application (> 20 dB). Moreover, the uniform dispersion of GN and strong interaction between fillers and matrix ensured greatly improved storage modulus, glass transition temperature, thermal stability and thermal conductivity.