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Fabrication Process of Silicone-based Dielectric Elastomer Actuators
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Evaluation of dielectric elastomers to develop materials suitable for actuation.

Philippe Banet1, Nouh Zeggai1, Jonathan Chavanne2

  • 1CY Cergy Paris Université, LPPI, F-95000 Cergy, France. philippe.banet@cyu.fr.

Soft Matter
|December 3, 2021
PubMed
Summary

This review introduces a new method to evaluate dielectric elastomers for actuators. It helps select the best materials and modifications for desired energy conversion and stability in soft electronic devices.

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Area of Science:

  • Materials Science
  • Polymer Science
  • Electromechanical Engineering

Background:

  • Dielectric elastomers are soft, stretchable capacitors converting electrical and mechanical energy, enabling applications like actuators and sensors.
  • Current research on dielectric elastomer actuators prioritizes high strain, focusing on material properties like breakdown field, Young's modulus, and dielectric constant.
  • The interdependency of these properties and electromechanical instability complicate material evaluation and comparison.

Purpose of the Study:

  • To address the complexities in evaluating and comparing dielectric elastomers for actuator applications.
  • To introduce a rational methodology for assessing dielectric elastomers based on energy conversion and electromechanical stability.
  • To provide a framework for identifying suitable materials and modification procedures for desired actuator performance.

Main Methods:

  • Introduction of two key physical parameters: one for energy converted and another for electromechanical stability.
  • Development of a general and rational methodology for comparing dielectric elastomers using physicochemical and electromechanical properties.
  • Analysis of commercially available dielectric elastomers and screening of modified elastomers based on the proposed methodology.

Main Results:

  • A methodology is presented to compare dielectric elastomers by considering their energy conversion and electromechanical stability.
  • Commercially available dielectric elastomers are analyzed, and various polymer modification methods are screened.
  • Trends are identified to guide the selection of appropriate modification procedures for specific elastomer requirements.

Conclusions:

  • The proposed methodology facilitates a rational comparison and evaluation of dielectric elastomers.
  • The review identifies suitable modification strategies for tailoring elastomer properties for actuator applications.
  • A quick identification method, including graphic representation, is offered to aid in the development of dielectric materials for actuators.