Electrical and piezoresistive properties of multi-walled carbon nanotube/polymer composite films aligned by an electric field

被引：276

作者：

Oliva-Aviles, A. I. ^{[1
]}

Aviles, F. ^{[2
]}

Sosa, V. ^{[1
]}

机构：

[1] Ctr Invest & Estudios Avanzados, Unidad Merida, Dept Fis Aplicada, Merida 97310, Yucatan, Mexico

[2] Ctr Invest Cient Yucatan, Unidad Mat, Merida 97200, Yucatan, Mexico

来源：

CARBON | 2011年 / 49卷 / 09期

关键词：

NANOTUBES; CONDUCTIVITY; ACTUATORS; ALIGNMENT; CNT;

D O I：

10.1016/j.carbon.2011.03.017

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Aligned multi-walled carbon nanotube (MWCNT)/polymer composite films are prepared by solution casting in the presence of an alternating electric field. Application of 7 kV/m at a frequency of 60 Hz to the polymer composite melt induces MWCNT alignment in the direction of the applied field, which is maintained after polymer crystallization. The electrical conductivity and piezoresistive response of electric-field-aligned and randomly oriented 0.1-0.75 wt% MWCNT/polysulfone films are evaluated. Electrical conductivity is 3-5 orders of magnitude higher for composites with electric-field-aligned MWCNTs than for randomly oriented composites. MWCNT alignment inside the polymer matrix also increases the film piezoresistive sensitivity, enhancing the strain sensing capabilities of the composite film. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：2989 / 2997

页数：9

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