Enhancement of electromagnetic interference shielding based on Co_(0.5)Zn_(0.5)Fe_2O_4/PANI-PTSA nanocomposites

摘要

Nanotechnology has involved enormous attention in enhancing electromagnetic interference (EMI) shielding. The nano-composite {Co_(0.5)Zn_(0.5)Fe_2O_4/PANI-PTSA} was synthesized in different ratios (9:1, 3:1, 1:1 and 1:3) and coded as (CZFP1, CZFP2, CZFP3 and CZFP4), respectively. X-ray diffraction, Hall effect, vibrating-sample magnetometer and then vector network analyzer in X-band were used to be characterized. The Nicholson-Ross-Weir (NRW) method was applied to determine the real and imaginary parts of the complex relative permittivity (ε*) and permeability (μ*). The nanocomposite CZFP3 exhibited the best absorption property with the optimal matching thickness of 3 mm in the frequency of 8-12 GHz. The value of the maximum RL was - 2.3 dB (> 40% power absorption) at 8.1 GHz, - 17.08 dB (98% power absorption) at 9 GHz and -24.86 dB (99.73% power absorption) at 10.9 GHz. The excellent absorption properties of Co_(0.5)Zn_(0.5)Fe_2O_4/PANI-PTSA nanocomposites with ratio weight 1:1 indicated their great potential as microwave absorbing materials.