Electromagnetic characteristics of carbon nanotube film materials

被引：0
作者：
Zhang Wei [1 ]
Xiong Huagang [1 ]
Wang Shaokai [2 ]
Li Min [2 ]
Gu Yizhuo [2 ]
机构：
[1] School of Electronic and Information Engineering, Beihang University
[2] School of Materials Science and Engineering, Beihang University
来源：
Chinese Journal of Aeronautics | 2015年 / 04期
基金：
美国国家科学基金会;
关键词：
Carbon nanotube; Permeability; Permittivity; Shielding effectiveness; Waveguide;
D O I：
暂无
中图分类号：
TB383.1 []; TB383.2 [];
学科分类号：
070205 ; 080501 ; 1406 ;
摘要：
Carbon nanotube(CNT) possesses remarkable electrical conductivity, which shows great potential for the application as electromagnetic shielding material.This paper aims to characterize the electromagnetic parameters of a high CNT loading film by using waveguide method.The effects of layer number of CNT laminate, CNT alignment and resin impregnation on the electromagnetic characteristics were analyzed.It is shown that CNT film exhibits anisotropic electromagnetic characteristic.Pristine CNT film shows higher real part of complex permittivity, conductivity and shielding effectiveness when the polarized direction of incident wave is perpendicular to the winding direction of CNT film.For the CNT film laminates, complex permittivity increases with increasing layer number, and correspondingly, shielding effectiveness decreases.The five-layer CNT film shows extraordinary shielding performance with shielding effectiveness ranging from 67 d B to78 d B in X-band.Stretching process induces the alignment of CNTs.When aligned direction of CNTs is parallel to the electric field, CNT film shows negative permittivity and higher conductivity.Moreover, resin impregnation into CNT film leads to the decrease of conductivity and shielding effectiveness.This research will contribute to the structural design for the application of CNT film as electromagnetic shielding materials.
引用
收藏
页码：1245 / 1254
页数：10
相关论文
共 6 条
  • [1] Preparation, magnetism and microwave absorption performance of ultra-thin Fe 3 O 4 /carbon nanotube sandwich buckypaper[J] . Shaowei Lu,Weikai Xu,Xiong Xuhai,Keming Ma,Xiaoqiang Wang.Journal of Alloys and Compounds . 2014
  • [2] Electromagnetic interference shielding of carbon nanotube macrofilms
    Wu, Zi Ping
    Li, Ming Mao
    Hu, Ying Yan
    Li, Ye Sheng
    Wang, Zhi Xiang
    Yin, Yan Hong
    Chen, Yi Sheng
    Zhou, Xiao
    [J]. SCRIPTA MATERIALIA, 2011, 64 (09) : 809 - 812
  • [3] Electromagnetic characterization of carbon nanotube films by a two-point evanescent microwave method
    Kozlowski, G.
    Kleismit, R.
    Boeckl, J.
    Campbell, A.
    Munbodh, K.
    Hopkins, S.
    Koziol, K.
    Peterson, T.
    [J]. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2009, 41 (08) : 1539 - 1544
  • [4] The influence of single-walled carbon nanotube structure on the electromagnetic interference shielding efficiency of its epoxy composites
    Huang, Yi
    Li, Ning
    Ma, Yanfeng
    Feng, Du
    Li, Feifei
    He, Xiaobo
    Lin, Xiao
    Gao, Hongjun
    Chen, Yongsheng
    [J]. CARBON, 2007, 45 (08) : 1614 - 1621
  • [5] Microwave absorption enhancement and complex permittivity and permeability of Fe encapsulated within carbon nanotubes
    Che, RC
    Peng, LM
    Duan, XF
    Chen, Q
    Liang, XL
    [J]. ADVANCED MATERIALS, 2004, 16 (05) : 401 - +
  • [6] High permittivity from defective multiwalled carbon nanotubes in the X-band
    Watts, PCP
    Hsu, WK
    Barnes, A
    Chambers, B
    [J]. ADVANCED MATERIALS, 2003, 15 (7-8) : 600 - 603
1