Broadband dynamic responses of flexible carbon black/poly (vinylidene fluoride) nanocomposites: A sensitivity study

Hao Xu, Zhihui Zeng, Zhanjun Wu, Li Min Zhou, Zhongqing Su, Yaozhong Liao, Menglong Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

23 Citations (Scopus)

Abstract

However, the sensitivity of existing nanocomposite strain sensors is limited, particularly in aspects of sensing precision and response frequency. This study focuses on sensitivity investigations of flexible nanocomposite sensors fabricated using a compound of carbon black (CB) fillers and polyvinylidene fluoride (PVDF) matrix, which has shown promising potential in perceiving extremely weak strain signals within a considerably broad range of response frequencies. As a highly important indication of sensitivity, sensing precision was characterized in a quantitative manner. Broadband spectrum analysis was conducted as an effective way to examine sensor performance in perceiving minimal disturbances in dynamic strains. Disturbances were generated in two experiments, by introducing local material and geometric variations into the inspected structures, in terms of mass attachment and structural damage. The effectiveness of the nanocomposites in structural damage detection was demonstrated. Moreover, the experimental results indicate the promising potential of nanocomposite-based strain sensors for applications such as advanced bioelectronics, ultrasonic inspection, and in-situ structural health monitoring.
Original languageEnglish
Pages (from-to)246-253
Number of pages8
JournalComposites Science and Technology
Volume149
DOIs
Publication statusPublished - 8 Sep 2017

Keywords

  • Damage detection
  • Dynamic strains
  • Nanocomposites
  • Sensing precision
  • Spectrum analysis

ASJC Scopus subject areas

  • Ceramics and Composites
  • Engineering(all)

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