Skip to main content
placeholder image

Strain sensors based on conducting poly(acrylamide) hydrogels

Journal Article


Abstract


  • A simple model system towards an impedance-probing strain sensor based on conducting tough hydrogels is demonstrated. A poly(acrylamide) hydrogel, cross-linked with N,N'-methylene-bis(acrylamide) was contacted with carbon fibres for electrical impedance analysis. The conductivity of the salt-containing hydrogel was determined to be 114 ± 10 mS/cm. Upon stretching the hydrogel samples to their fourfold initial length, the impedance response increased according to a power law. This was used to establish a sensing equation for the relation between the resistive component of the impedance signal and the applied mechanical strain under tension. This work contributes to the development of highly stretchable and soft strain sensors for applications in soft robotics.

Publication Date


  • 2020

Citation


  • Kunzel, M., & Panhuis, M. I. H. (2020). Strain sensors based on conducting poly(acrylamide) hydrogels. MRS Advances, 5(17), 917-925. doi:10.1557/adv.2020.112

Scopus Eid


  • 2-s2.0-85097875058

Start Page


  • 917

End Page


  • 925

Volume


  • 5

Issue


  • 17

Abstract


  • A simple model system towards an impedance-probing strain sensor based on conducting tough hydrogels is demonstrated. A poly(acrylamide) hydrogel, cross-linked with N,N'-methylene-bis(acrylamide) was contacted with carbon fibres for electrical impedance analysis. The conductivity of the salt-containing hydrogel was determined to be 114 ± 10 mS/cm. Upon stretching the hydrogel samples to their fourfold initial length, the impedance response increased according to a power law. This was used to establish a sensing equation for the relation between the resistive component of the impedance signal and the applied mechanical strain under tension. This work contributes to the development of highly stretchable and soft strain sensors for applications in soft robotics.

Publication Date


  • 2020

Citation


  • Kunzel, M., & Panhuis, M. I. H. (2020). Strain sensors based on conducting poly(acrylamide) hydrogels. MRS Advances, 5(17), 917-925. doi:10.1557/adv.2020.112

Scopus Eid


  • 2-s2.0-85097875058

Start Page


  • 917

End Page


  • 925

Volume


  • 5

Issue


  • 17