In situ preparation of carbon/Fe₃C composite nanofibers with excellent electromagnetic wave absorption properties

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• 作者：Chongyang Sun ; Yiping Guo ; ^{ypguo@sjtu.edu.cn} ; Xuehui Xu ; Qi Du ; Huanan Duan ; Yujie Chen ; Hua Li ; Hezhou Liu ; ^{hzhliu@sjtu.edu.cn}
• 关键词：A. Carbon nanofibers ; A. Nanocomposites ; B. Electrical properties ; B. Magnetic properties
• 刊名：Composites Part A: Applied Science and Manufacturing
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：92
• 期：Complete
• 页码：33-41
• 全文大小：2311 K
• 卷排序：92

文摘

Poly(vinyl pyrrolidone) (PVP)-based carbon/Fe3C composite nanofibers (C/Fe3C CNFs) have been successfully prepared by carbonization of as-electrospun PVP/ferric nitrate nanofibers. Unlike the pristine PVP nanofibers, the PVP/ferric nitrate nanofibers can retain fibers structure after carbonization, in which Fe3C nanoparticles are well-dispersed. More importantly, the as-prepared wax composites exhibit high electromagnetic wave absorption abilities, which can be attributed to the formation of the C/Fe3C CNFs “conductive network”, and leads to a more effective dielectric loss in terms of dissipating the induced current in the wax composites. Specifically, the CNFs/wax composites with a low filler ratio of 10 wt% shows the minimum reflection loss of −62.6 dB at 11.25 GHz in a thin matching thickness of 3.6 mm, and the effective bandwidth below −10 dB can reach up to 6.5 GHz. Thus, this work demonstrates a facile, cost-effective synthesized strategy to prepare carbon-based lightweight composite nanofibers with superior electromagnetic wave absorption properties.