Magnetization and thickness dependent microwave attenuation behaviour of Ferrite-PANI composites and embedded composite-fabrics prepared by <i>in situ</i> polymerization

Ultrahigh efficient and effective electromagnetic-interference (EMI) shielding composites have been fabricated with the combination of Polyaniline zinc-cobalt ferrites (Co1-xZnxFe2O4, 0.1 ? x 0.4). Ferrite nanoparticles synthesized via sol-gel method were functionalized to polyaniline in situ polymerization. Average crystallite sizes estimated using Debye–Scherrer Rietveld found be between 20-30 nm. FTIR spectra revealed formation interactions PANI molecules ferrite nanoparticles. Substitution nonmagnetic Zn ions considerably changes magnetic properties cobalt as observed from M-H loops recorded by VSM at room temperature. The EMI-shielding performance was examined various thicknesses polymer filler ratio 1:1 X-band frequency region a vector network analyser. EMI increasing thickness where 3.0 mm achieved an SE ? 100 dB for Co0.7Zn0.3Fe2O4-PANI composite. Composite absorbers deposited on cotton fabrics protective clothing incorporation during synthesis which displayed relatively high effectiveness (SE) (40-45 dB) only 0.30 fabrics. PANI-Ferrite nanocomposites can established promising capacity electromagnetic materials because dipole polarization losses low cost, lightweight, durability good flexibility.