Graphene woven fabric/polydimethylsiloxane composites as flexible strain and temperature sensors for wearable applications

Xu Liu, Chen Tang, Shuai Xiong, Siyuan Xi, Xiaohan Du, Yuefeng Liu, Ying Wu, Zhenyu Wang, Xi Shen, Qingbin Zheng, Jang Kyo Kim

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Graphene woven fabrics (GWFs) are fabricated by template-directed chemical vapor deposition on Ni templates. Freestanding GWFs with orthogonally interconnected graphene tubes are obtained after etching Ni frameworks. One layer of freestanding GWF is deposited onto a flexible and stretchable polydimethylsiloxane (PDMS) substrate. The change in electrical resistance (ΔR) relative to the original resistance (R0) is continuously monitored as a function of applied strain while the GWF/PDMS composite is subjected to cyclic uniaxial tension. The normalized resistance of the composite shows a ∼ 670% increase at a tensile strain of 3% and is recovered to zero upon unloading during the loading/unloading cycles, indicating that the composite can be used as flexible strain sensors within the reversible strain range. Besides strain, the composite also shows a normalized resistance change of ∼ 400% with a temperature increase from ambient to 100°C, confirming a sufficient sensitivity for use as temperature sensors. Such lightweight and highly sensitive, conductive GWF/PDMS composites are excellent candidates as flexible sensors for emerging wearable applications. A wearable musical instrument is demonstrated with integrated GWF/PDMS composites as flexible motion sensor so that one can easily produce music by hand gestures through cellphones.

Original languageEnglish
Title of host publicationECCM 2016 - Proceeding of the 17th European Conference on Composite Materials
PublisherEuropean Conference on Composite Materials, ECCM
ISBN (Electronic)9783000533877
Publication statusPublished - Jun 2016
Externally publishedYes
Event17th European Conference on Composite Materials, ECCM 2016 - Munich, Germany
Duration: 26 Jun 201630 Jun 2016

Publication series

NameECCM 2016 - Proceeding of the 17th European Conference on Composite Materials

Conference

Conference17th European Conference on Composite Materials, ECCM 2016
Country/TerritoryGermany
CityMunich
Period26/06/1630/06/16

Keywords

  • Composites
  • Graphene woven fabric
  • Strain sensor
  • Temperature sensor
  • Wearable device

ASJC Scopus subject areas

  • Ceramics and Composites

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