High-permittivity silicone dielectric elastomers compatible with ionic liquid-grafted chloropropyl-silicone oil

Zhaoqing Kang, Liyun Yu, Yi Nie, 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 elastomers (DEs) can undergo very large spatial deformations in response to an externally applied electrical field, giving them significant potential as soft actuators. High-performance DEs are usually modified by high-permittivity additives, which are used to lower driving voltages. In this study, a novel high-permittivity soft additive (LMS-EIL) was developed via the combination of high-permittivity ionic liquid (IL) and chloropropyl-silicone, enabling good compatibility with the silicone matrix. The relative dielectric permittivity of the novel silicone oil additive was 9×104 times higher at 0.1Hz compared to pristine chloropropyl-silicone oil. High-permittivity silicone elastomers were then achieved via incorporation of this novel IL-grafted chloropropyl-silicone oil. The relative dielectric permittivity of elastomers modified with 10 parts per hundred rubber (phr) LMS-EIL increased from 3.0 (pure film) to 22 at 0.1Hz, while the Young’s modulus decreased steadily with increasing LMS-EIL concentration. A simplified figure of merit (Fom') was used to evaluate actuation performance, and was shown to be 8.1 for the elastomer incorporated with 10 phr LMS-EIL, indicating excellent potential for use as an actuator.
Original languageEnglish
Title of host publicationElectroactive Polymer Actuators and Devices (EAPAD) XXIII
EditorsIain A. Anderson, Herbert R. Shea, John D. W. Madden
Number of pages10
PublisherSPIE - International Society for Optical Engineering
Publication date2021
Article number1158714
Publication statusPublished - 2021
EventSPIE Smart Structures + Nondestructive Evaluation - Online event
Duration: 22 Mar 202127 Mar 2021


ConferenceSPIE Smart Structures + Nondestructive Evaluation
LocationOnline event


  • Dielectric elastomer
  • Ionic liquids
  • High-permittivity
  • Grafting
  • Chloropropyl-silicone


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