Electromagnetic interference shielding mechanisms of CNT/polymer composites
Electromagnetic interference shielding mechanisms of CNT/polymer composites
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DOI：
10.1016/j.carbon.2009.02.030
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发表时间：
2009-06-01
期刊：
影响因子：
10.9
通讯作者：
Sundararaj, Uttandaraman
中科院分区：
文献类型：
--
作者：
Al-Saleh, Mohammed H.;Sundararaj, Uttandaraman
从实验和理论上分析了多壁碳纳米管（MWCNT）/聚合物复合材料的电磁屏蔽机理。对于实验分析，多壁碳纳米管/聚丙烯（PP）复合材料板的EMI屏蔽效能（SE）在三个不同的厚度和四个不同的浓度进行了研究。采用基于平面电磁波屏蔽的电磁屏蔽模型，从理论上研究了电磁屏蔽机理。实验结果表明，吸收是主要的屏蔽机制，反射是次要的屏蔽机制。模拟结果表明，多壁碳纳米管内表面和多壁碳纳米管外表面之间的多重反射降低了整体EMI SE。MWCNT/PP复合材料的EMI SE随着MWCNT含量和屏蔽板厚度的增加而增加。(C)2009爱思唯尔有限公司保留所有权利。
The electromagnetic interference (EMI) shielding mechanisms of multi-walled carbon nanotube (MWCNT)/polymer composites were analyzed experimentally and theoretically. For the experimental analysis, EMI shielding effectiveness (SE) of MWCNT/polypropylene (PP) composite plates made in three different thicknesses and at four different concentrations were studied. A model based on the shielding of electromagnetic plane wave was used to theoretically study the EMI shielding mechanisms. The experimental results showed that absorption is the major shielding mechanism and reflection is the secondary shielding mechanism. The modeling results demonstrated that multiple-reflection within MWCNT internal surfaces and between MWCNT external surfaces decrease the overall EMI SE. The EMI SE of MWCNT/PP composites increased with increase in MWCNT content and shielding plate thickness. (C) 2009 Elsevier Ltd. All rights reserved.