Regulation binary electromagnetic filler networks in segregated poly(vinylidenefluoride) composite for absorption‐dominated electromagnetic interference shielding

Abstract

AbstractExcellent conductivity and optimized impedance matching are vital for superior absorption‐dominated electromagnetic interference (EMI) shielding. An efficient binary electromagnetic filler network regulation method has been proposed. Poly‐ (vinylidenefluoride)‐ferroferric oxide‐reduced graphene oxide/single‐wall carbon nanotube (PVDF‐Fe3O4‐RGC) composite has been synthesized as a layered segregated polymer composite structure by using an electrostatic assembly and hot compression strategy. Binary electromagnetic filler networks have surpassed the obstacles of magnetic materials in conductive networks, and are thereby beneficial for outstanding conductivity and impedance matching. Therefore, a superior conductivity of 1.28 S cm−1 and an outstanding electromagnetic shielding interference and effectiveness of 44.5 dB have been obtained for loading of 2.02 vol.% single‐wall carbon nanotubes (SWCNTs), with an absorption rate larger than 85.0% in the X‐band. The enhanced EMI shielding performance is attributed to the regulation of the binary electromagnetic filler network.