MWCNT/CuO/Fe3O4/Polyaniline Nanocomposites with Remarkable Microwave Attenuation and Broad Frequency Band by Tuned Composition

Abstract Novel quaternary MWCNT/CuO/Fe3O4/PANI nanocomposites were synthesized with three different weight ratios of CuO/Fe3O4/PANI to MWCNT (1:3), (1:4), and (1:5), in a way, all its components were synthesized separately and then combined with certain weight ratios. TEM image of CuO/Fe3O4/PANI proved that most of the nanoparticles were in a form of CuO/Fe3O4 hybrids with narrow size distribution which were uniformly dispersed in a polymer background. TEM and SEM of MWCNT/CuO/Fe3O4/PANI nanocomposite indicated that MWCNT was covered with a uniform thickness of CuO/Fe3O4/PANI. All three samples of nanocomposites exhibited excellent microwave attenuation performance via both aspects of reflection loss and absorption bandwidth. Minimum reflection losses were 45.7, 58.7 and 85.4, 87.4 dB for MWCNT/CuO/Fe3O4/PANI nanocomposites (1:3), (1:4) and (1:5), respectively. Absorption bandwidths (RL ≤ -10 dB) were 6, 7.6 and 6 GHz, for MWCNT/CuO/Fe3O4/PANI nanocomposites (1:3), (1:4) and (1:5), respectively.