Characterization and Microwave Absorption Performance of CNTs/Fe_3O_4/PANI Nanocomposites

摘要

Three-phase light-weight CNTs/Fe_3O_4/PANI nanocomposites were prepared by the co-precipitation of Fe~(2+) and Fe~(3+), and a quick process of in situ polymerization of aniline monomer. The structure and morphology of CNTs /Fe_3O_4/ PANI were characterized by transmission electron-microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and fourier transform infrared (FTIR) spectroscopy. The CNTs/Fe_3O_4/PANI nanocomposites exhibit less intertwined structure and that many more Fe_3O_4 particles are attached homogeneously on the surface of CNTs, indicating that PANI can indeed help CNTs to disperse in isolated form. The wave absorbing properties were investigated in a frequency of 2-18 GHz. The results show that the CNTs/Fe_3O_4/PANI nanocomposites exhibit a super absorbing behavior and possess a maximum reflection loss of-48 dB at 12.9 GHz, and the bandwidth below 20 dB is more than 5 GHz.