Sandwiched carbon nanotube film as strain sensor

Njuguna, M.K., Yan, C., Hu, N., Bell, J.M., & Yarlagadda, P.K.D.V. (2012) Sandwiched carbon nanotube film as strain sensor. Composites Part B : Engineering, 43(6), pp. 2711-2717.

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Two types of carbon nanotube nanocomposite strain sensors were prepared by mixing carbon nanotubes with epoxy (nanocomposite sensor) and sandwiching a carbon nanotube film between two epoxy layers (sandwich sensor). The conductivity, response and sensitivity to static and dynamic mechanical strains in these sensors were investigated. The nanocomposite sensor with 2-3 wt.% carbon nanotube demonstrated high sensitivity to mechanical strain and environmental temperature, with gauge factors of 5-8. On the other hand, a linear relationship between conductivity and dynamic mechanical strain was observed in the sandwich sensor. The sandwich sensor was also not sensitive to temperature although its strain sensitivity (gauge factor of about 3) was lower as compared with the nanocomposite sensor. Both sensors have excellent response to static and dynamic strains, thereby having great potential for strain sensing applications.

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ID Code: 50628
Item Type: Journal Article
Refereed: Yes
Keywords: A. Nano-structures, A. Polymer-matrix composites, A. Smart materials, B. Electrical properties
DOI: 10.1016/j.compositesb.2012.04.022
ISSN: 1359-8368
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 Elsevier Ltd.
Copyright Statement: This is the author’s version of a work that was accepted for publication in <Composites Part B: Engineering>. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composites Part B: Engineering, [VOL 43, ISSUE 6, (2012)] DOI: 10.1016/j.compositesb.2012.04.022
Deposited On: 02 Jul 2012 23:27
Last Modified: 11 Sep 2013 08:08

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