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Related Experiment Video

Updated: Oct 5, 2025

Fabrication Process of Silicone-based Dielectric Elastomer Actuators
10:32

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Highly Stretchable Silicone Elastomer Applied in Soft Actuators.

Pengpeng Hu1, Fabio Beco Albuquerque2, Jeppe Madsen1

  • 1Department of Chemical and Biochemical Engineering, Technical University of Denmark, Lyngby, 2800, Denmark.

Macromolecular Rapid Communications
|January 27, 2022
PubMed
Summary
This summary is machine-generated.

Highly stretchable silicone elastomers enable dielectric elastomer actuators (DEAs) to operate at lower voltages. These DEAs offer significant strain with improved damping, showing promise for specific applications.

Keywords:
dielectric elastomer actuatorshigh stretchabilitylong-term stabilitylow-voltage actuationsilicone elastomers

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Area of Science:

  • Materials Science
  • Polymer Science
  • Robotics

Background:

  • Dielectric elastomer actuators (DEAs) are crucial for soft robotics and artificial muscles.
  • Reducing operational voltage and enhancing material properties are key challenges in DEA development.

Purpose of the Study:

  • To investigate the performance of DEAs fabricated with a highly stretchable silicone elastomer.
  • To evaluate the impact of high prestretches on reducing operation voltages.
  • To characterize the actuation strain, response time, and lifetime of these novel DEAs.

Main Methods:

  • Incorporation of a highly stretchable silicone elastomer into DEA fabrication.
  • Application of high prestretches to thin DEA films.
  • Characterization of actuation strain at varying voltages and film thicknesses.
  • Analysis of DEA response time, viscous behavior, and operational lifetime under DC actuation.

Main Results:

  • DEAs achieved 30% lateral strain at 4.3 kV (122 µm film) and 2.5% strain at 250 V (6.9 µm film).
  • The inherent viscosity of the silicone elastomer led to slower response times (2-14 s) and increased damping.
  • Mean lifetimes varied significantly (0.9 h to >123.0 h) depending on the initial electrical field.
  • DEAs (150 µm thick, prestretch ratio of 3) demonstrated 1.4-2.6% strain at 300 V with a mean lifetime of 123.0 h.

Conclusions:

  • Highly stretchable silicone elastomers can significantly reduce the operating voltage of DEAs.
  • The inherent viscosity offers desirable damping properties for specific applications.
  • These DEAs show potential for applications requiring large strains at low voltages, provided fast response times are not critical.