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Excellent electromagnetic interference shielding characteristics of a unidirectionally oriented thin multiwalled carbon nanotube/polyethylene film
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SYSNO ASEP 0532711 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Excellent electromagnetic interference shielding characteristics of a unidirectionally oriented thin multiwalled carbon nanotube/polyethylene film Author(s) Chikyu, N. (JP)
Nakano, T. (JP)
Kletetschka, Günther (GLU-S) RID, SAI, ORCID
Inoue, Y. (JP)Article number 108918 Source Title Materials and Design. - : Elsevier - ISSN 0264-1275
Roč. 195, October (2020)Number of pages 9 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords Multiwalled carbon nanotube ; Oriented CNT/PE composite film ; Electromagnetic interference shielding ; Microstrip line ; Radio wave absorption Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect) Method of publishing Open access Institutional support GLU-S - RVO:67985831 UT WOS 000576530000002 EID SCOPUS 85088815498 DOI 10.1016/j.matdes.2020.108918 Annotation In this study, we synthesized oriented multiwalled carbon nanotube (CNT)/polyethylene (PE) composite films and investigated their electromagnetic interference (EMI) shielding properties. The oriented CNT sheet structure was prepared by stacking CNT webs produced by a dry spinning technique with a CNT forest. In a near-field EMI attenuation measurement by a microstrip line method, composite films with a CNT fraction higher than 2 wt% showed a high attenuation that exceeded 50 dB at 10 GHz. This high attenuation was due to the enhancedmagnetic anisotropy of the oriented CNTs and the encapsulated catalyst-derived cementite nanoparticles. This is the first report of highmagnetic anisotropy in an oriented CNT structure for noise attenuation in a transmission line. In a far-field EMI shielding measurement by a coaxial tube method, the EMI shielding effectiveness (SE) significantly increased as the number of CNTweb layers increased. A CNT/PE filmwith a high CNT fractionwas found to have a high specific EMI SE of 0.6 dB/μm. The oriented CNT/PE composite film has great potential as a promising EMI material that demonstrates high shielding efficiency performance with low CNT loading. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Year of Publishing 2021 Electronic address https://www.sciencedirect.com/science/article/pii/S0264127520304524
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