Herein, polydimethylsiloxane (PDMS) was used as matrix, multi-walled carbon nanotubes (MWCNTs), nickel (Ni) and antimony trioxide (Sb2O3) particles were used as multiple fillers to explore the electric-magneticdielectric loss synergism in the composites. Generally, MWCNTs and Ni particles in the composites provided mainly electric and magnetic dissipation of microwaves, respectively. Sb2O3 particles were used to improve impedance matching and reduce surface reflection of microwaves. The synergistic effect of the Sb2O3-Ni-MWCNTs on electromagnetic interference (EMI) shielding effectiveness (SE) was discussed for combination of fillers with different ratio. Furthermore, the symmetrical structure (SS) and asymmetric structure (AS) composites were designed to obtain high EMI SE and absorption coefficient. For example, the SS composites and the AS composites could achieve the high EMI SET/absorption coefficient of ~ 57.4 dB/ ~ 0.75, and ~ 55.7 dB/ ~0.80, respectively, because of the electric-magnetic-dielectric synergism and Salisbury screen effect.

全文链接：https://doi.org/10.1016/j.compositesa.2022.106901