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Journal of Materials Science: Materials in Electronics

, Volume 30, Issue 23, pp 20420–20431 | Cite as

Electromagnetic shielding of ultrathin, lightweight and strong nonwoven composites decorated by a bandage-style interlaced layer electropolymerized with polyaniline

  • Hao Lu
  • Bangquan Liao
  • Haibo Wang
  • Zhiwei XuEmail author
  • Nan Li
  • Liangsen Liu
  • Xingxiang Zhang
  • Ning Wu
Article
  • 7 Downloads

Abstract

The electromagnetic shielding materials with characteristics of ultrathin, lightweight and high strength are the most advantageous materials in electromagnetic shielding. In this work, novel carbon fiber nonwoven composites with interlayer microstructure were designed and prepared. Due to their special structure, carbon fiber nonwoven composites coated with polyaniline by means of electropolymerization showed excellent electromagnetic shielding (65 dB) and mechanical properties (bending strength of 457 MPa). More intriguing, the absolute SE (Shielding Effectiveness) of the composites can be as high as 3904 dB.cm2/g. In order to explore the elementary mechanisms of electromagnetic loss, the relevant calculation of electromagnetic shielding effectiveness was carried out. The experimental and theoretical results show that the reflection is the dominant shielding performance of the carbon fiber nonwoven composites. However, with the increase of electropolymerization time, the absorption loss was enhanced and the reflection was weakened, which was caused by the conductive polyaniline network structure covered on the nonwoven fiber surface. Based on the comparison between experimental results and theoretical calculation, the effect of multiple reflection loss on the total electromagnetic shielding performance was improved, and the loss mechanism of multiple reflection was analyzed in detail. Moreover, the surface roughness of fiber and the formation of polymerization products by electropolymerization could effectively enhance the interfacial strength between carbon fiber nonwoven and epoxy, which observably increased the bending strength by 83%.

Notes

Acknowledgements

The work was funded by the National Natural Science Foundation of China (11575126), the Natural Science Foundation of Tianjin (16JCZDJC37800, 16JCYBJC17700) and the Science and Technology Plans of Tianjin (16ZXCLGX00090).

Supplementary material

10854_2019_2379_MOESM1_ESM.pdf (219 kb)
Supplementary material 1 (PDF 219 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Hao Lu
    • 1
  • Bangquan Liao
    • 1
  • Haibo Wang
    • 2
  • Zhiwei Xu
    • 2
    Email author
  • Nan Li
    • 2
  • Liangsen Liu
    • 2
  • Xingxiang Zhang
    • 2
  • Ning Wu
    • 2
  1. 1.School of Physical Science and TechnologyTianjin Polytechnic UniversityTianjinChina
  2. 2.Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage Technology, School of Textiles Science and EngineeringTianjin Polytechnic UniversityTianjinChina

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