材料科学
弹性体
复合材料
复合数
执行机构
人工肌肉
软机器人
电活性聚合物
各向同性
静电纺丝
各向异性
聚合物
电气工程
物理
工程类
量子力学
作者
Jing Wang,Zhiwen Chen,Feng Xu,Jiawei Lin,Bin Zhu,Zhenjin Xu,Gang Zhou,Shouxin Zhang,Qinnan Chen,Lingyun Wang,Dezhi Wu
标识
DOI:10.1002/admt.202201706
摘要
Abstract Anisotropic actuation, a universal phenomenon in nature, may be inspiring for the development of intelligent soft robotics in the future. For dielectric elastomers (DEs), important investigations have been done to decrease the voltage and increase the actuation strain. However, mechanical isotropy of synthetic DEs shows in‐plane uniform deformation, lacking the controllability of the actuation direction. Herein, an anisotropic DE (denoted as ADE) is constructed by casting Ecoflex/BaTiO 3 solution onto oriented TPU nanofibrous membranes fabricated via drum electrospinning. The resulting ADE with a seamless three‐layer structure features mechanical anisotropy in the elastic modulus, with the maximum ratio between x and y directions of the plane being 11. A prototype ADE‐based actuator demonstrates a high electroactuation anisotropy of 3.95, a large unidirectional length strain of 15%, and a high energy density of 0.014 MJ m −3 at an electric field of 40 V µm −1 . Two potential applications, a flow divider valve simulating the Transwell test in the medical field and a mechanical stimulus component mimicking the maturation of cardiomyocytes, are successfully demonstrated. Thus, this work offers a versatile yet simple approach for fabricating anisotropic electroactive elastomer actuators in the future.
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