Preparation, magnetism and microwave absorption performance of ultra-thin Fe3O4/carbon nanotube sandwich buckypaper

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[1] Lu, Shaowei
[2] Xu, Weikai
[3] Xuhai, Xiong
[4] Ma, Keming
[5] Wang, Xiaoqiang
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Lu, S. (lushaowei_2005@163.com) | 1600年 / Elsevier Ltd卷 / 606期
关键词：
Fe3O4/multi-walled carbon nanotubes (MWCNTs) sandwich buckypapers were fabricated with monodisperse solutions of MWCNTs and Fe 3O4 nanoparticles through layer by layer vacuum filtration method and can be co-cured with composites for microwave absorbing application. The morphology; element composition and magnetic properties of sandwich buckypapers were characterized by field-emission scanning electron microscope; energy dispersive spectrometer; X-ray diffraction and vibrating sample magnetometer. The complex permittivity and permeability; the reflection loss properties of polymer composites surface coated buckypapers were investigated in the frequency range of 8.2-18 GHz. The results indicate that; due to the electromagnetic matching of magnetic loss and dielectric loss; the microwave absorption properties of the Fe3O4/MWCNTs sandwich buckypaper attached polymer composites are evidently improved. When the blending Fe3O4 content in sandwich buckypaper is 20 wt%; the composite displays a larger and wider absorption peak (-12.62 dB at 17.72 GHz); and the bandwidth of the reflection loss below -5 dB is larger than 5.6 GHz with a absorbing thickness of 0.1 mm. © 2014 Elsevier B.V. All rights reserved;
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