聚合物基体对基于单壁碳纳米管的复合材料电磁干扰屏蔽性能的影响。

Impact of polymer matrix on the electromagnetic interference shielding performance for single-walled carbon nanotubes-based composites.

作者信息

Liang Jiajie, Huang Yi, Li Ning, Bai Gang, Liu Zunfeng, Du Feng, Li Feifei, Ma Yanfeng, Chen Yongsheng

机构信息

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

出版信息

J Nanosci Nanotechnol. 2013 Feb;13(2):1120-4. doi: 10.1166/jnn.2013.5997.

DOI:10.1166/jnn.2013.5997

PMID:23646584

Abstract

Composites of acrylonitrile butadiene styrene (ABS), epoxy and soluble cross-linked polyurethane (SCPU) with various loadings of single-walled carbon nanotubes (SWCNTs) were prepared. Their electromagnetic interference (EMI) shielding effectiveness (SE) in the frequency range of 8.2-12.4 GHz (X band) was studied. Well-dispersed SWCNT composites were created in these three representative polymer matrixes. The choice of polymer matrix greatly affects the conductivity, percolation threshold, and EMI shielding properties of the SWCNT/polymer composites. Enhanced EMI SE performances were observed for the composites with better dispersed SWCNTs. Moreover, the EMI SE performances strongly correlated with SWCNT loading in the polymer matrix. The best SWCNT dispersion was achieved in the epoxy matrix: 20-30 dB EMI SE was obtained with 15 wt% SWCNTs.

摘要

制备了含有不同负载量单壁碳纳米管（SWCNT）的丙烯腈-丁二烯-苯乙烯共聚物（ABS）、环氧树脂和可溶性交联聚氨酯（SCPU）复合材料。研究了它们在8.2-12.4 GHz频率范围（X波段）的电磁干扰（EMI）屏蔽效能（SE）。在这三种具有代表性的聚合物基体中制备出了分散良好的SWCNT复合材料。聚合物基体的选择对SWCNT/聚合物复合材料的电导率、渗流阈值和EMI屏蔽性能有很大影响。对于SWCNT分散性较好的复合材料，观察到其EMI SE性能有所增强。此外，EMI SE性能与聚合物基体中SWCNT的负载量密切相关。在环氧树脂基体中实现了最佳的SWCNT分散：15 wt%的SWCNT可获得20-30 dB的EMI SE。