Self-Healing Dielectric Elastomers for Damage-Tolerant Actuation and Energy Harvesting. Ellingford, C., Zhang, R., Wemyss, A. M., Zhang, Y., Brown, O. B., Zhou, H., Keogh, P., Bowen, C., & Wan, C. ACS APPLIED MATERIALS & INTERFACES, 12(6):7595–7604, February, 2020. doi abstract bibtex The actuation and energy-harvesting performance of dielectric elastomers are strongly related to their intrinsic electrical and mechanical properties. For future resilient smart transducers, a fast actuation response, efficient energy-harvesting performance, and mechanical robustness are key requirements. In this work, we demonstrate that poly(styrene-butadiene-styrene) (SBS) can be converted into a self-healing dielectric elastomer with high permittivity and low dielectric loss, which can be deformed to large mechanical strains; these are key requirements for actuation and energy-harvesting applications. Using a one-step click reaction at room temperature for 20 min, methyl-3-mercaptopropionate (M3M) was grafted to SBS and reached 95.2% of grafting ratios. The resultant M3M-SBS can be deformed to a high mechanical strain of 1000%, with a relative permittivity of epsilon(r) = 7.5 and a low tan delta = 0.03. When used in a dielectric actuator, it can provide 9.2% strain at an electric field of 39.5 MV m(-1) and can also generate an energy density of 11 mJ g(-1) from energy harvesting. After being subjected to mechanical damage, the self-healed elastomer can recover 44% of its breakdown strength during energy harvesting. This work demonstrates a facile route to produce self-healing, high permittivity, and low dielectric loss elastomers for both actuation and energy harvesting, which is applicable to a wide range of diene elastomer systems.
@article{ellingford_self-healing_2020,
title = {Self-{Healing} {Dielectric} {Elastomers} for {Damage}-{Tolerant} {Actuation} and {Energy} {Harvesting}},
volume = {12},
issn = {1944-8244},
doi = {10.1021/acsami.9b21957},
abstract = {The actuation and energy-harvesting performance of dielectric elastomers are strongly related to their intrinsic electrical and mechanical properties. For future resilient smart transducers, a fast actuation response, efficient energy-harvesting performance, and mechanical robustness are key requirements. In this work, we demonstrate that poly(styrene-butadiene-styrene) (SBS) can be converted into a self-healing dielectric elastomer with high permittivity and low dielectric loss, which can be deformed to large mechanical strains; these are key requirements for actuation and energy-harvesting applications. Using a one-step click reaction at room temperature for 20 min, methyl-3-mercaptopropionate (M3M) was grafted to SBS and reached 95.2\% of grafting ratios. The resultant M3M-SBS can be deformed to a high mechanical strain of 1000\%, with a relative permittivity of epsilon(r) = 7.5 and a low tan delta = 0.03. When used in a dielectric actuator, it can provide 9.2\% strain at an electric field of 39.5 MV m(-1) and can also generate an energy density of 11 mJ g(-1) from energy harvesting. After being subjected to mechanical damage, the self-healed elastomer can recover 44\% of its breakdown strength during energy harvesting. This work demonstrates a facile route to produce self-healing, high permittivity, and low dielectric loss elastomers for both actuation and energy harvesting, which is applicable to a wide range of diene elastomer systems.},
number = {6},
urldate = {2020-03-04},
journal = {ACS APPLIED MATERIALS \& INTERFACES},
author = {Ellingford, Christopher and Zhang, Runan and Wemyss, Alan M. and Zhang, Yan and Brown, Oliver B. and Zhou, Hongzhao and Keogh, Patrick and Bowen, Christopher and Wan, Chaoying},
month = feb,
year = {2020},
pages = {7595--7604},
}
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In this work, we demonstrate that poly(styrene-butadiene-styrene) (SBS) can be converted into a self-healing dielectric elastomer with high permittivity and low dielectric loss, which can be deformed to large mechanical strains; these are key requirements for actuation and energy-harvesting applications. Using a one-step click reaction at room temperature for 20 min, methyl-3-mercaptopropionate (M3M) was grafted to SBS and reached 95.2% of grafting ratios. The resultant M3M-SBS can be deformed to a high mechanical strain of 1000%, with a relative permittivity of epsilon(r) = 7.5 and a low tan delta = 0.03. When used in a dielectric actuator, it can provide 9.2% strain at an electric field of 39.5 MV m(-1) and can also generate an energy density of 11 mJ g(-1) from energy harvesting. After being subjected to mechanical damage, the self-healed elastomer can recover 44% of its breakdown strength during energy harvesting. 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For future resilient smart transducers, a fast actuation response, efficient energy-harvesting performance, and mechanical robustness are key requirements. In this work, we demonstrate that poly(styrene-butadiene-styrene) (SBS) can be converted into a self-healing dielectric elastomer with high permittivity and low dielectric loss, which can be deformed to large mechanical strains; these are key requirements for actuation and energy-harvesting applications. Using a one-step click reaction at room temperature for 20 min, methyl-3-mercaptopropionate (M3M) was grafted to SBS and reached 95.2\\% of grafting ratios. The resultant M3M-SBS can be deformed to a high mechanical strain of 1000\\%, with a relative permittivity of epsilon(r) = 7.5 and a low tan delta = 0.03. When used in a dielectric actuator, it can provide 9.2\\% strain at an electric field of 39.5 MV m(-1) and can also generate an energy density of 11 mJ g(-1) from energy harvesting. 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