▎ 摘　　要

The combination of electronic and magnetic shielding materials has been attracted considerable attentions because of the high-performance electromagnetic interference (EMI) shielding effectiveness (SE) produced by the synergetic effects between them. Here, the innovative structural Fe3O4/graphene foam (GF) composite is assembled by magnetic Fe3O4 nanoparticles anchoring onto the highly electronic conductive 3D GF. The electrical conductivity of the flexible Fe3O4/GF/poly dimethylsiloxane (PDMS) composite reaches up to 2.5 S cm(-1). The EMI SE of Fe3O4/GF/PDMS composite (similar to 1.0 mm) increases from similar to 26.6 dB for GF/PDMS composite to similar to 32.4 dB in the frequency range of 8.2-12.4 GHz, which is attributed to the synergistic effect between Fe3O4 nanoparticles and GF. Furthermore, after repeatedly bending for 10000 cycles, the EMI SE of the Fe3O4/GF/ PDMS composite still reaches up to 29.4 dB.