Orthogonal pattern of spinnable multiwall carbon nanotubes for electromagnetic interference shielding effectiveness

Duck Weon Lee, Hyunsoo Kim, Ji Hwan Moon, Jae Hun Jeong, Hyeon Jun Sim, Bum Joon Kim, Jae Sang Hyeon, Ray H. Baughman, Seon Jeong Kim*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

The need for thin and lightweight electromagnetic interference shielding materials is rapidly increasing in several industries, such as aerospace and telecommunication. This research finds that a shielding material, which is developed by the orthogonal pattern of spinnable multiwall carbon nanotubes (MWNTs), is ultra-light weight, thin, and has a high shielding effectiveness (SE). An orthogonal pattern, generated by just alignment of the spinnable MWNTs without adding any support materials such as polymers, ceramics, and magnets demonstrates that it is possible to efficiently attenuate electromagnetic interference (EMI) in the X-band frequency range (8.2–12.4 GHz). EMI SE in the developed shielding material is about 19.2 dB with a specific shielding effectiveness (SSE)/t (thickness) value of 73,633 dB cm2 g−1 at a thickness of about 4.48 μm. In addition, absorption effectiveness in this shielding material is as high as 96.3%, which provides excellent ability to reduce the secondary damage by reflection.

Original languageEnglish
Pages (from-to)33-39
Number of pages7
JournalCarbon
Volume152
DOIs
Publication statusE-pub ahead of print - 22 May 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • Electromagnetic interference
  • Orthogonal pattern
  • Relative permittivity
  • Spinnable multiwall carbon nanotubes
  • X-band frequency range

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