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

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...

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Bibliographic Details
Published in:Carbon (New York) 2019-11, Vol.152, p.33-39
Main Authors: Lee, Duck Weon, Kim, Hyunsoo, Moon, Ji Hwan, Jeong, Jae-Hun, Sim, Hyeon Jun, Kim, Bum Joon, Hyeon, Jae Sang, Baughman, Ray H., Kim, Seon Jeong
Format: Article
Language:English
Subjects:
Aerospace industry
Carbon
Electromagnetic interference
Electromagnetic shielding
Electromagnetics
Electromagnetism
Frequency ranges
Magnets
Multi wall carbon nanotubes
Nanotubes
Orthogonal pattern
Relative permittivity
Spinnable multiwall carbon nanotubes
Superhigh frequencies
Thickness
Thin films
Weight reduction
X-band frequency range
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Summary: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. [Display omitted]
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2019.05.052