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Hsiao-Ya Chu

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Proceedings Article | 18 April 2022 Presentation

Bilayer tubular shape actuator using CNT-based shape memory polymer

Wei-Chih Wang, Hsiao-Ya Chu, Chun-Yen Hsieh

Proceedings Volume PC12045, PC120450C (2022) https://doi.org/10.1117/12.2613242

KEYWORDS: Actuators, Shape memory polymers, Coating, Silver, Composites, Liquids, Control systems, Carbon nanotubes

Read Abstract +

By having the capability of shape-shifting, shape memory polymer is widely used on different kind of applications. One of the actuator configurations is made into a tubular shape actuator. Several methods have been developed to heat the SMP tube, such as blowing hot air and flowing through heated liquid. However, these methods aren’t robust since it is difficult to control the exact temperature on the component. To solve this problem, silver paint coating had been used to make the SMP tube conductive and actuated by using Joule heating. Although silver paint coating seems to work well, it isn’t mechanically robust. Over time, the coating develops cracks once the spring go through multiple extensions and contractions. These micro cracks will enlarge over time and render spring useless. In order to improve the SMP patterned tube into electrical controllable, a carbon nanotube (CNT) composite SMP was developed. Background, fabrication and electrical and mechanical characterization of this newly developed composite will be presented. Multidirectional movement of a actuator will be demonstrated.

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