Novel silicone-ionic liquid composite with keratin utilized as pressure sensor

Xue Liu, Yi Nie, Liyun Yu, Suojiang Zhang, Anne Ladegaard Skov*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Dielectric elastomer (DE) sensors have great potential for applications in soft robotics, wearable devices and medical diagnostic. A novel pressure sensor with remarkably improved force sensing characteristics was obtained through combined usage of polydimethylsiloxane (PDMS) and ionic liquid (IL). The regenerated keratin from wool was added and dispersed homogeneously in the PDMS matrix acting as reinforcing fillers. The influence of the amount of IL on the electro-mechanical properties of the composites was investigated. One obvious result was that the permittivity of the ILcontaining elastomers increased dramatically with the increased amount of IL loaded. Furthermore, the sensitivity of the composite elastomers as pressure sensors was investigated by recording the response of the voltage when a small force is applied to the top surface of the pressure sensor. The elastomers with IL loaded exhibit excellent response of the voltage and the maximum sensitivity of the composite elastomer is 2.64 mV/N.

Original languageEnglish
Title of host publicationElectroactive Polymer Actuators and Devices (EAPAD) XXII
EditorsYoseph Bar-Cohen, Iain A. Anderson, Herbert R. Shea
Number of pages9
PublisherSPIE - International Society for Optical Engineering
Publication date2020
Article number113750R
ISBN (Electronic)9781510635272
Publication statusPublished - 2020
EventSPIE Smart Structures + Nondestructive Evaluation - Online
Duration: 27 Apr 20208 May 2020


ConferenceSPIE Smart Structures + Nondestructive Evaluation
SeriesProceedings of SPIE - The International Society for Optical Engineering


  • High sensitivity
  • Ionic liquid
  • Keratin
  • Polydimethylsiloxane
  • Pressure sensor


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