Electromagnetic-wave shielding promulgation of cluster like FZ@MWCNT composite incorporated in GO matrices by polarization relaxation and potential degradation

To protect against the adverse effects of electromagnetic (EM) radiation in the range of radio- to micro-waves, we have developed new polymer-based nanocomposites consisting of high dielectric, magnetic, and conducting columns. We have optimized the synthesis of γ-Fe2O3 and ZnO in different potential matrices such as multiwall carbon nanotubes (MWCNT) and graphene oxide (GO), termed as FZ@MWCNT and FZ@MWCNT-GO. Saturation magnetization, coercive field and MT curve suggest the mixture of superparamagnetic and ferrimagnetic nanoparticles blocked at room temperature. The electromagnetic attenuation of these composites containing 60 wt% with paraffin wax shows a significant improvement in the maximum shielding efficiency of 56.7 dB, making FZ@MWCNT and FZ@MWCNT-GO very good candidates for electromagnetic shielding. In addition, the extra-ordinary enhancement of absorption is attributed to the synergistic effect of dielectric losses due to conductivity, interfacial polarization as well as magnetic losses due to magnetic resonances and eddy current impact.