A unimorph nanocomposite dielectric elastomer for large out-of-plane actuation

被引：60

作者：

Pu, Junhong ^{[1
,2
]}

Meng, Yuan ^{[1
]}

Xie, Zhixin ^{[1
]}

Peng, Zihang ^{[1
]}

Wu, Jianghan ^{[1
]}

Shi, Ye ^{[1
]}

Plamthottam, Roshan ^{[1
]}

Yang, Wei ^{[2
]}

Pei, Qibing ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Henry Samueli Sch Engn & Appl Sci, Soft Mat Res Lab, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

[2] Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China

来源：

SCIENCE ADVANCES | 2022年 / 8卷 / 09期

基金：

中国国家自然科学基金;

关键词：

POLYMER ACTUATORS; STRAIN; ROBOT;

D O I：

10.1126/sciadv.abm6200

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Dielectric elastomer actuators (DEAs) feature large, reversible in-plane deformation, and stacked DEA layers are used to produce large strokes in the thickness dimension. We introduce an electrophoretic process to concentrate boron nitride nanosheet dispersion in a dielectric elastomer precursor solution onto a designated electrode surface. The resulting unimorph nanocomposite dielectric elastomer (UNDE) has a seamless bilayer structure with 13 times of modulus difference. The UNDE can be actuated to large bending curvatures, with enhanced breakdown field strength and durability as compared to conventional nanocomposite dielectric elastomer. Multiple UNDE units can be formed in a simple electrophoretic concentration process using patterned electrode areas. A disc-shaped actuator comprising six UNDE units outputs large bidirectional stroke up to 10 Hz. This actuator is used to demonstrate a high-speed lens motor capable of varying the focal length of a two-lens system by 40 times.

引用

页数：10

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