Electromechanical properties of a yarn strain sensor with graphene-sheath/polyurethane-core

Xiaoting Li, Tao Hua, Bingang Xu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

115 Citations (Scopus)


By integrating graphene/poly(vinyl alcohol) composites as the conductive sheath around yarn, and polyurethane yarn as the elastic core by using a layer-by-layer assembly method that is simple, scalable and low in cost, the merits of both types of materials are incorporated to fabricate sensors with enhanced performance. The combined effects of graphene concentration and number of coatings on sensor properties are elucidated, and on that basis, the electromechanical properties can be modified by adjusting the parameters. The sensors are characterized in terms of sensitivity, resistivity, linearity, repeatability, hysteresis and thermal stability. There are two sensors (graphene concentration of 0.8 wt% and 1.0 wt%, and 12 and 9 cycles of coating respectively) with high sensitivity (gauge factor of 28.48 and 86.86, respectively), good linearity between the change in relative resistance and applied strain (correlation coefficient of 0.95 and 0.97, respectively), good repeatability (repeatability error of 2.03% and 1.81%, respectively), low hysteresis (hysteresis error of 7.03% and 9.08%, respectively) and excellent thermal stability (within the range of 25 °C–310 °C).
Original languageEnglish
Pages (from-to)686-698
Number of pages13
Publication statusPublished - 1 Jul 2017


  • Electromechanical
  • Graphene
  • Polyurethane yarn
  • Strain sensor

ASJC Scopus subject areas

  • Chemistry(all)


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