Abstract
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 (~1.0 mm) increases from ~26.6 dB for GF/PDMS composite 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.
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