Achieving enhanced electromagnetic shielding by novel flexible rubber based nanocomposite with the incorporation of nickel spinal ferrites and polyaniline

Abstract

The chemical oxidative method was used for the polymerization of the polyaniline (PANI) using APS as an oxidant and formic acid as a dopant and co-precipitation method was used for the precipitation of nickel ferrites (NiFe). Polyaniline used to impart conductivity and nickel ferrites for magnetic permeability to achieve high EMI shielding. Seven different composites were made varying their composition and tested for various properties like morphology, DC conductivity, EMI shielding etc. In SEM analysis it was discovered that PANI and NiFe particles dispersed in NBR rubbers uniformly. DC conductivity was also rised to 286 S/cm from 10−7 S/cm. XRD and particle size analysis used to conform the successful fabrication of PANI and NiFe and their particle size respectively. DSC confirmed that the melting point dosned by the addition of PANI and NiFe in NBR rubber. EMI shielding of almost 52 dB was achieved while pure rubber provide only 1–2 dB.