Abstract
Electromagnetic interference shielding materials based on polyaniline/Mg0.6Cu0.4Fe2O4 ternary nanocomposites were prepared using in situ chemical oxidation polymerization method. The crystalline, structural and morphology analyses of the synthesized material were studied by X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR) and high resolution transmission electron microscopy (HR-TEM). The nanocomposites were examined by UV–Vis spectroscopy (UV–Vis), four probe resistivity, vibrating sample magnetometer (VSM), thermal gravimetric analysis (TGA) and vector network analyzer (VNA) for the optical, electrical, thermal, magnetic and shielding properties. XRD, FTIR and UV–Vis spectra analyses confirmed the formation of ferrites and polyaniline phases in the composites. The particle sizes of Mg0.6Cu0.4Fe2O4 are lying in the range of 15–40 nm verified by the HR-TEM. VSM study proved the presence of magnetic nanoparticles in the polyaniline matrix. TGA results revealed that the mixing of ferrites particles in polyaniline has improved its thermal stability. The nanocomposites are showing the significant shielding effectiveness value up to 32.8 dB in the X-band frequency range which makes them potential shielding material for electromagnetic interference shielding applications due to lightweight, good processability and low cost.
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