Enhancing electromagnetic wave absorption in carbon fiber using FeS2 nanoparticles
Yuying Guo, Meng Zhang, Tingting Cheng, Yuxin Xie, Laibin Zhao, Liang Jiang, Wenxin Zhao, Liying Yuan, Alan Meng, Jian Zhang, Ting Wang, Zhenjiang Li
Abstract
Carbon-based electromagnetic wave absorbing materials (absorbers) adhered with metallic sulfide nanoparticles of good electrical conductivity attract increasing researchers’ attention. In this study, on the basis of carbon fiber (C f )@Fe 3 O 4 nanocomposites obtained by the electrostatic spinning and reflow method, C f @FeS 2 nanocomposite was successfully prepared during a further hydrothermal process. The products exhibit excellent electromagnetic wave absorption performances with a minimum reflection loss (RL min ) of −54.11 dB at 2.13 mm matching thickness. At the same time, the optimal effective absorption bandwidth (EAB) value of 6.04 GHz at a thickness of 1.98 mm covers the whole Ku band, suggesting its excellent electromagnetic wave absorption performances. In addition, the interlaced network structure constructed by carbon fiber, outstanding conductivity of FeS 2 nanoparticles, and interfacial polarization from hetero-structure play significant parts in enhancing the electromagnetic parameters and absorption performances. All these results suggest that the C f @FeS 2 nanocomposites can be taken as a new electromagnetic wave-absorbing material under their low density, simple craft, and strong absorption characteristics.