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Journal of Nanomaterials
Volume 2014 (2014), Article ID 727024, 6 pages
http://dx.doi.org/10.1155/2014/727024
Research Article

Electromagnetic Wave Shielding Effectiveness Based on Carbon Microcoil-Polyurethane Composites

Center for Green Fusion Technology, Department of Engineering in Energy & Applied Chemistry, Silla University, Busan 617-736, Republic of Korea

Received 4 April 2014; Revised 30 June 2014; Accepted 30 June 2014; Published 15 July 2014

Academic Editor: Antonios Kelarakis

Copyright © 2014 Gi-Hwan Kang and Sung-Hoon Kim. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Carbon microcoils (CMCs) were deposited onto Al2O3 substrates using C2H2/H2 as source gases and SF6 as an incorporated additive gas in a thermal chemical vapor deposition system. CMC-polyurethane (PU) composites were obtained by dispersing the CMCs in the PU with a dimethylformamide additive. The electromagnetic wave shielding properties of the CMC-PU composites were examined in the frequency range of 0.25–1.5 GHz. The shielding effectiveness (SE) of the CMCs-PU systematically increases with increasing the content of CMCs and/or the layer thickness. Based on these results, the main SE mechanism for this work was suggested and discussed.