High Curvature of Polymer-Based Miniaturized Flexible Actuator at Very Low Electric Field

IF 4.2 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Simon Toinet, Mohammed Benwadih, Helga Szambolics, Sylvain Minot, Christine Revenant, Marine Bordet, Nellie Della Schiava, Minh-Quyen Le, Pierre-Jean Cottinet
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Abstract

The use of high electric fields, as well as pre-stressing, are the two main obstacles to the widespread use of poly(vinylidene fluoride (PVDF)-based actuators. In response, a new double-sided multilayer device has been developed which, coupled with a polarization procedure, enables high bending performance at low voltages. The actuator's symmetry allows zero bending at rest, while the high number of layers enables a strong field to be maintained while reducing the applied voltage. X-ray and permittivity studies reveal the ultimate links between the microscopic material displacement and the actuator deflection. These results, coupled with the analytical model developed in this work, demonstrate that the optimization of complex multilayer systems requires a detailed understanding of mechanics, design, and microstructure. Experimental, analytical and finite element results confirm that such a double-sided multilayer actuator is of 50% more efficient than a conventional single-sided actuator, up to 40 V µm−1. These achievements open up new prospects for PVDF-based actuators in application of healthcare, such as arterial navigation.

Abstract Image

基于聚合物的微型柔性致动器在极低电场下的高曲率
使用高电场和预应力是广泛使用基于聚偏二氟乙烯(PVDF)的致动器的两个主要障碍。为此,我们开发了一种新型双面多层装置,该装置与极化程序相结合,可在低电压下实现高弯曲性能。致动器的对称性允许静态零弯曲,而较多的层数可在降低外加电压的同时保持较强的磁场。X 射线和介电常数研究揭示了微观材料位移与致动器挠度之间的最终联系。这些结果与本研究中开发的分析模型相结合,证明了复杂多层系统的优化需要对力学、设计和微观结构有详细的了解。实验、分析和有限元结果证实,这种双面多层致动器的效率比传统单面致动器高 50%,最高可达 40 V µm-1。这些成果为基于 PVDF 的致动器在动脉导航等医疗保健领域的应用开辟了新的前景。
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来源期刊
Macromolecular Materials and Engineering
Macromolecular Materials and Engineering 工程技术-材料科学:综合
CiteScore
7.30
自引率
5.10%
发文量
328
审稿时长
1.6 months
期刊介绍: Macromolecular Materials and Engineering is the high-quality polymer science journal dedicated to the design, modification, characterization, and processing of advanced polymeric materials.
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