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

A. I. Oliva-Avilés; F. Avilés; V. Sosa

doi:10.1016/j.carbon.2011.03.017

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

A. I. Oliva-Avilés, F. Avilés, V. Sosa

Research output: Contribution to journal › Article › peer-review

302 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	2989-2997
Number of pages	9
Journal	Carbon
Volume	49
Issue number	9
DOIs	https://doi.org/10.1016/j.carbon.2011.03.017
State	Published - 1 Aug 2011
Externally published	Yes

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abstract = "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.",

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N2 - 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.

AB - 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.

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

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