单壁碳纳米管环氧复合材料的电磁干扰（EMI）屏蔽

Electromagnetic interference (EMI) shielding of single-walled carbon nanotube epoxy composites.

作者信息

Li Ning, Huang Yi, Du Feng, He Xiaobo, Lin Xiao, Gao Hongjun, Ma Yanfeng, Li Feifei, Chen Yongsheng, Eklund Peter C

机构信息

Key Laboratory of Functional Polymer Materials and Center for Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.

出版信息

Nano Lett. 2006 Jun;6(6):1141-5. doi: 10.1021/nl0602589.

DOI:10.1021/nl0602589

PMID:16771569

Abstract

Single-walled carbon nanotube (SWNT)-polymer composites have been fabricated to evaluate the electromagnetic interference (EMI) shielding effectiveness (SE) of SWNTs. Our results indicate that SWNTs can be used as effective lightweight EMI shielding materials. Composites with greater than 20 dB shielding efficiency were obtained easily. EMI SE was tested in the frequency range of 10 MHz to 1.5 GHz, and the highest EMI shielding efficiency (SE) was obtained for 15 wt % SWNT, reaching 49 dB at 10 MHz and exhibiting 15-20 dB in the 500 MHz to 1.5 GHz range. The EMI SE was found to correlate with the dc conductivity, and this frequency range is found to be dominated by reflection. The effects of SWNT wall defects and aspect ratio on the EMI SE were also studied.

摘要

单壁碳纳米管（SWNT）-聚合物复合材料已被制备出来，以评估SWNTs的电磁干扰（EMI）屏蔽效能（SE）。我们的结果表明，SWNTs可用作有效的轻质EMI屏蔽材料。很容易获得屏蔽效率大于20 dB的复合材料。在10 MHz至1.5 GHz的频率范围内测试了EMI SE，对于15 wt%的SWNT，获得了最高的EMI屏蔽效率（SE），在10 MHz时达到49 dB，在500 MHz至1.5 GHz范围内表现为15 - 20 dB。发现EMI SE与直流电导率相关，并且该频率范围以反射为主。还研究了SWNT壁缺陷和长径比对EMI SE的影响。