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Hu, Ning
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Publications (4/4 displayed)
- 2015Investigation on temperature-dependent electrical conductivity of carbon nanotube/epoxy composites for sustainable energy applicationscitations
- 2012Sandwiched carbon nanotube film as strain sensorcitations
- 2008The electrical properties of polymer nanocomposites with carbon nanotube fillerscitations
- 2008Tunneling effect in a polymer/carbon nanotube nanocomposite strain sensorcitations
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article
Sandwiched carbon nanotube film as strain sensor
Abstract
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.