Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: The Shielding Effectiveness of the CNTs/SSFs/PA6 Conductive Composites
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 726-728)
Author(s): Yang-fei Zhang, LTCS, Department of Advanced Materials and Nanotechnology, College of Engineering, Peking University, Beijing, China
Yang Luo, LTCS, Department of Advanced Materials and Nanotechnology, College of Engineering, Peking University, Beijing, China
Shu-lin Bai, LTCS, Department of Advanced Materials and Nanotechnology, College of Engineering, Peking University, Beijing, China
Man Li, LTCS, Department of Advanced Materials and Nanotechnology, College of Engineering, Peking University, Beijing, China
Zhi-yong Jia, LTCS, Department of Advanced Materials and Nanotechnology, College of Engineering, Peking University, Beijing, China
Abstract: 21 types of CNTs/SSFs/PA6 composites were synthesized as electromagnetic interface (EMI) shielding materials with the SSFs weight fractions of 2wt% ~ 12wt% and CNTs weight fractions of 1wt% and 3wt%. The properties of shielding effectiveness (SE) and volume resistivity were measured and discussed. The SE of composites increased with increasing SSFs loading from 30 MHz to 1.5 GHz, achieving the threshold value at the SSFs fraction of 4wt%-6wt%. At the loading of 12wt% SSFs, composites exhibited more than 35dB in the frequency range of 30 MHz to 1.5 GHz. The results show that CNTs can greatly decrease volume resistivity of composites at the threshold value due to the forming of conductive network.
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