A strain sensor from a polymer/carbon nanotube nanocomposite

Ning Hu, Yoshifumi Karube, Hisao Fukunaga

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

In this work, the piezoresistive behavior of a strain sensor made from a polymer/carbon nanotube nanocomposite has been investigated. To underpin the working principle of the sensor, we propose an improved 3D statistical resistor network model by incorporating the tunneling effect among randomly distributed carbon nanotubes (CNTs) in a polymer matrix.Moreover, the strain sensor has been experimentally fabricated from a polymer nanocomposite with multi-walled carbon nanotube (MWNT) fillers. The piezoresistivity of this nanocomposite strain sensor has been experimentally investigated. The numerical results obtained from the 3D statistical resistor network model combined with the fiber reorientation model agree very well with the experimental measurements. From numerical and experimental results, as compared to the traditional strain gauges, much higher sensitivity can be obtained in this nanocomposite sensor. The tunneling effect is highlighted to be the major working mechanism of the sensor under small strains. By using the proposed successful numerical model, the influences of various parameters on the sensitivity of the new sensor have been numerically investigated in detail. The influence of various experimental parameters on the sensitivity of the sensor has also been studied. Both results have shown that higher resistance of the sensor leads to higher sensitivity of the sensor. Furthermore, the different behaviors of the sensor under tension and compression have been investigated.

Original languageEnglish
Title of host publicationIUTAM Symposium on Multi-Functional Material Structures and Systems - Proceedings of the IUTAM Symposium on Multi-Functional Material Structures and Systems
PublisherSpringer Verlag
Pages77-86
Number of pages10
ISBN (Print)9789048137701
DOIs
Publication statusPublished - 2010
EventIUTAM Symposium on Multi-Functional Material Structures and Systems - Benguluru, India
Duration: 2008 Dec 102008 Dec 12

Publication series

NameIUTAM Bookseries
Volume19
ISSN (Print)1875-3507

Other

OtherIUTAM Symposium on Multi-Functional Material Structures and Systems
CountryIndia
CityBenguluru
Period08/12/1008/12/12

Keywords

  • Carbon nanotubes
  • Nanocomposites
  • Strain sensor
  • Tunneling effect

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Automotive Engineering
  • Aerospace Engineering
  • Acoustics and Ultrasonics
  • Mechanical Engineering

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