The Shielding Effectiveness of the CNTs-SSFs-PA6 Conductive CompositesReport as inadecuate




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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.

KEYWORDS

carbon nanotube; stainless steel fiber; conductive composites; shielding effectiveness; volume resistivity

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Author: Yang-fei Zhang, Yang Luo, Shu-lin Bai, Man Li, Zhi-yong Jia

Source: http://www.scirp.org/



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