Dielectric gels with ultra-high dielectric constant, low elastic modulus, and excellent transparency

We designed dielectric gels, a new type of polymer-based dielectric material. By using solvents with high dielectric constants, the gels achieve a unique combination of ultra-high dielectric constant, low elastic modulus, and excellent transparency, which are extremely challenging or impossible to r...

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Bibliographic Details
Published in:NPG Asia materials 2018-08, Vol.10 (8), p.821-826
Main Authors: Shi, Lei, Yang, Ruisen, Lu, Shiyao, Jia, Kun, Xiao, Chunhui, Lu, Tongqing, Wang, Tiejun, Wei, Wei, Tan, Hui, Ding, Shujiang
Format: Article
Language:English
Subjects:
Automation
Biomimetics
Elastic properties
Gels
Manufacturing engineering
Mechanical hysteresis
Modulus of elasticity
Permittivity
Polymers
Stretchability
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Summary:We designed dielectric gels, a new type of polymer-based dielectric material. By using solvents with high dielectric constants, the gels achieve a unique combination of ultra-high dielectric constant, low elastic modulus, and excellent transparency, which are extremely challenging or impossible to realize with traditional polymer dielectrics. The gels exhibit high stretchability (stretch of approximately 10) and low mechanical hysteresis. We demonstrated the use of the dielectric gels by fabricating a bioinspired tunable lens, the focal length of which can be adjusted by varying the applied voltage. We believe that the dielectric gels, as a new type of polymer dielectric, offer new opportunities for soft robotics, sensors, electronics, optics, and biomimetics.
ISSN:1884-4049
1884-4057
DOI:10.1038/s41427-018-0077-7