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Electrical and mechanical self-healing in high-performance dielectric elastomer actuator materials
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Zhang, Yan, Ellingford, Christopher, Zhang, Runan, Roscow, James, Hopkins, Margaret, Keogh, Patrick, McNally, Tony, Bowen, Chris and Wan, Chaoying (2019) Electrical and mechanical self-healing in high-performance dielectric elastomer actuator materials. Advanced Functional Materials, 29 (15). 1808431. doi:10.1002/adfm.201808431 ISSN 1616-301X.
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Official URL: https://doi.org/10.1002/adfm.201808431
Abstract
Dielectric elastomers are of interest for actuator applications due to their large actuation strain, high bandwidth, high energy density, and their flexible nature. If future dielectric elastomers are to be used reliably in applications that include soft robotics, medical devices, artificial muscles, and electronic skins, there is a need to design devices that are tolerant to electrical and mechanical damage. In this paper, the first report of self‐healing of both electrical breakdown and mechanical damage in dielectric actuators using a thermoplastic methyl thioglycolate–modified styrene–butadiene–styrene (MGSBS) elastomer is provided. The self‐healing functions are examined from the material to device level by detailed examination of the healing process, and characterization of electrical properties and actuator response before and after healing. It is demonstrated that after dielectric breakdown, the initial dielectric strength can be recovered by up to 67%, and after mechanical damage, a 39% recovery can be achieved with no degradation of the strain–voltage response of the actuators. The elastomer can also heal a combination of mechanical and electrical failures. This work provides a route to create robust and damage tolerant dielectric elastomers for soft robotic and other applications related to actuator and energy‐harvesting systems.
Item Type: | Journal Article | |||||||||||||||
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Subjects: | Q Science > QC Physics | |||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||||||||
Library of Congress Subject Headings (LCSH): | Dielectrics, Polymers -- Electric properties | |||||||||||||||
Journal or Publication Title: | Advanced Functional Materials | |||||||||||||||
Publisher: | Wiley - V C H Verlag GmbH & Co. KGaA | |||||||||||||||
ISSN: | 1616-301X | |||||||||||||||
Official Date: | 11 April 2019 | |||||||||||||||
Dates: |
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Volume: | 29 | |||||||||||||||
Number: | 15 | |||||||||||||||
Article Number: | 1808431 | |||||||||||||||
DOI: | 10.1002/adfm.201808431 | |||||||||||||||
Status: | Peer Reviewed | |||||||||||||||
Publication Status: | Published | |||||||||||||||
Reuse Statement (publisher, data, author rights): | This is the peer reviewed version of the following article: Zhang, Y., Ellingford, C., Zhang, R., Roscow, J., Hopkins, M., Keogh, P., McNally, T., Bowen, C., Wan, C., Adv. Funct. Mater. 2019, 1808431. https://doi.org/10.1002/adfm.201808431, which has been published in final form at https://doi.org/10.1002/adfm.201808431. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. | |||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||
Date of first compliant deposit: | 14 February 2019 | |||||||||||||||
Date of first compliant Open Access: | 21 February 2020 | |||||||||||||||
RIOXX Funder/Project Grant: |
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