Abstract
Nanocomposites composed of cobalt ferrite (CoFe2O4), thermoplastic polyurethane (TPU), and fly ash were fabricated to enhance electromagnetic interference (EMI) shielding. The change in electrical conductivity because of increasing the concentrations of fly ash and cobalt ferrite was estimated, and the increase in electrical conductivity was observed in results. Electromagnetic interference (EMI) shielding is the key application area of these nanocomposites in microwave frequency ranging from 0.1 to 20 GHz and in near infrared (NIR) region of wavelength which ranges from 700 to 2500 nm. Maximum DC conductivity achieved was 5.54*10−7 S/cm. Transmission observance in the NIR region was lower than 0.5%. Highest EMI shielding of 35 dB was achieved at a wide range of frequency from 0.1 to 8 GHz.
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