Copper nanowire/polystyrene nanocomposites: Lower percolation threshold and higher EMI shielding

被引：204

作者：

Al-Saleh, Mohammed H. ^{[2
]}

Gelves, Genaro A. ^{[2
]}

Sundararaj, Uttandaraman ^{[1
,2
]}

机构：

[1] Univ Calgary, Dept Chem & Petr Engn, Schulich Sch Engn, Calgary, AB T2N 1N4, Canada

[2] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2011年 / 42卷 / 01期

关键词：

Polymer-matrix composites (PMCs); Electrical properties; Microstructures; Metal nanowires; CARBON NANOTUBE COMPOSITES; ELECTROMAGNETIC-INTERFERENCE; POLYMER COMPOSITES; ELECTRICAL-CONDUCTIVITY; EPOXY COMPOSITES; POLYSTYRENE COMPOSITES; MECHANICAL-PROPERTIES; PARTICLE-SIZE; NANOWIRES; NANOFIBER;

D O I：

10.1016/j.compositesa.2010.10.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A highly conductive with exceptional electromagnetic interference (EMI) shielding capabilities copper nanowire (CuNW)/Polystyrene (PS) composite powder was formulated by solution processing. We used a dilution process where the conductive powder was then dry mixed with pure PS powder to prepare composites with lower CuNW concentration. The composite parts were prepared by compression molding. The electrical percolation threshold of the composite prepared by the dilution process followed by the compression molding was only 0.24 vol.% CuNW. Electron micrographs indicated that the conductive powder formed a segregated network within the polymer matrix. The EMI shielding effectiveness (SE) results showed that in the X-band frequency range, a 210 mu m film made of PS composite containing 1.3 vol.% CuNW has an EMI SE of 27 dB and PS with 2.1 vol.% CuNW has an EMI SE of 35 dB. For 1.3 vol.% and 2.1 vol.% CuNW composites, contribution of absorption to the overall shielding was similar to 54% of the overall EMI SE. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：92 / 97

页数：6

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