Abstract
•High MW SE was achieved in the hybrid PMCs with high Ag-ZnO NP/Co NW contents.•Interfacial polarization of the shield contributed significantly in achieving good SE.•The absorption mechanism improved with increasing the content of Cobalt nanowire.
Multi reinforcement based composite films has been fabricated and tested for electrical, magnetic and EMI shielding behavior. The main objective of this research was to analyze how a magnetic material is more susceptible to increase the EMI shielding effect than conductive composite. The EMI shield was made using Zinc and Silver nanoparticle, Cobalt nanowire and Caryota urens natural fibres (CUNFs). The hand layup method was used for making shielding composite followed by post curing process at 120 °C for 48 h. The obtained results assured that the hybrid specimens exhibited improved performance by boosting shielding efficiency with increasing concentration of conductive and magnetic fillers. Notably, the SEM micrographs exhibit more adhesion for surface modified surfaces than those unmodified surfaces. A highest attenuation of ~ 50.8 dB was achieved for composite designation SP3, which contains 6phe of ZnO, Ag and Co-nanowire, which confirms the importance of adding magnetic filler. These improved EMI shielding hybrid composites could be used in many applications such as defense products, communication instruments and EMI filters.