Investigation on sensitivity of a polymer/carbon nanotube composite strain sensor

Ning Hu, Yoshifumi Karube, Masahiro Arai, Tomonori Watanabe, Cheng Yan, Yuan Li, Yaolu Liu, Hisao Fukunaga

Research output: Contribution to journalArticlepeer-review

524 Citations (Scopus)

Abstract

Extensive numerical simulation and experimental measurements have been conducted to understand the effects of processing parameters and material properties on sensor sensitivity in polymer/carbon nanotube (CNT) composite sensors. The numerical simulation was based on an improved three-dimensional statistical resistor network model incorporating the tunneling effect between the neighbouring nanotubes, and a fiber reorientation model. The behaviors of a sensor subjected to both tensile and compressive strains were investigated. Both numerical and experimental results indicate that a higher tunneling resistance or higher ratio of the tunneling resistance to the total resistance of the sensor leads to a higher sensor sensitivity. Processing conditions and material properties, such as weight fraction, diameter and conductivity of CNTs, curing temperature, mixing rate and barrier height of polymer matrix all play a role in determining the sensor sensitivity. Crown

Original languageEnglish
Pages (from-to)680-687
Number of pages8
JournalCarbon
Volume48
Issue number3
DOIs
Publication statusPublished - 2010 Mar

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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