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Polymers (Basel). 2018 Jun 22;10(7). pii: E697. doi: 10.3390/polym10070697.

Voltage-Induced Wrinkle Performance in a Hydrogel by Dielectric Elastomer Actuation.

Tang C1, Li B2,3, Zou C4, Liu L5,6, Chen H7,8,9.

Author information

1
School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China. wstcsues@163.com.
2
School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China. liboxjtu@xjtu.edu.cn.
3
Shaanxi Key Laboratory for Intelligent Robot, Xi'an Jiaotong University, Xi'an 710049, China. liboxjtu@xjtu.edu.cn.
4
School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China. zouchenbang@stu.xjtu.edu.cn.
5
School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China. aist456@163.com.
6
State Key Laboratory of Fluid Power and Mechanic Systems, Zhejiang University, Hangzhou 310027, China. aist456@163.com.
7
School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China. hlchen@xjtu.edu.cn.
8
Shaanxi Key Laboratory for Intelligent Robot, Xi'an Jiaotong University, Xi'an 710049, China. hlchen@xjtu.edu.cn.
9
State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an 710049, China. hlchen@xjtu.edu.cn.

Abstract

Hydrogel is a type of soft smart material and is responsive to stimuli. In the development of actuation in hydrogel, electrical actuation features a fast and universal strategy which is favored in the engineering system. Due to the difficulty in direct electrical actuation in hydrogel, in this study, an indirect actuation was attained via a dielectric elastomer. An aligned wrinkle pattern was obtained in the hydrogel upon a direct-current voltage, and it is reversible. The morphology and nonlinear mechanics of the electro-wrinkling deformation was characterized and analyzed. The optical property of the wrinkle in hydrogel was investigated, demonstrating a tunable blurring effect in optics. The electro-wrinkling performance offers a potential application with soft and tunable optical property in hydrogel-based actuators.

KEYWORDS:

actuation; dielectric elastomer; hydrogel; optics; wrinkle

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