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

Abstract

Excellent 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-Fe 3 O 4 -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 À1 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.

In Situ Growth of Fe3O4 Nanoparticles in Poly(arylene ether nitrile)/Graphene/Carbon Nanotube Foams for Electromagnetic Interference Shielding

“…In addition, this study is aimed to construct absorption-dominated EMI shielding materials by in situ growth of Fe 3 O 4 in a porous conductive network structure, and to better explore the effectiveness of this scheme, the comparison of EMI SE and Ar of the GCF composite foams with other reported materials is investigated in a microwave frequency range of 8.2–12.4 GHz (shown in Figure ). The materials involved in the comparison contained all conductive fillers and Fe 3 O 4 particles and were all introduced into Fe 3 O 4 particles by other methods, such as co-blending. ,− It can be found that the EMI SE and Ar of GCF4 are significantly higher than those of some reported materials. Although the EMI SE of some materials is higher than that of GCF4, their Ar needs further improvement.…”

Recent advances in structural design of conductive polymer composites for electromagnetic interference shielding

“…The coaxial transmission line method has emerged as the most widely adopted approach for measuring EMI SE, owing to its broad frequency measurement range, superior test repeatability, and comparability of results across different equipment 53 . The major advantage of this method lied in its capability to measure the EMI shielding performance of a given sample across a wide frequency range from 2 to 18 GHz.…”

Review of Polymer-Based Composites for Electromagnetic Shielding Application

“…The recent studies of segregated-structured electromagnetic shielding materials are summarized in Table 3. Zhang et al [150] prepared PVDF/Fe 3 O 4 -RGC composite using layered electrostatic assembly and hot pressing. Wu et al [151] obtained Fe 3 O 4 @PA6/MWCNT composite with layer-adding manufacturing and molding.…”