Temperature-Responsive Tensile Actuator Based on Multi-walled Carbon Nanotube Yarn

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• 作者：Hyunsoo Kim ; Jae Ah Lee ; Hyeon Jun Sim ; Márcio D. Lima…
• 刊名：Nano-Micro Letters
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：8
• 期：3
• 页码：254-259
• 全文大小：852 KB
• 刊物类别：Nanotechnology and Microengineering; Nanotechnology; Nanoscale Science and Technology;
• 刊物主题：Nanotechnology and Microengineering; Nanotechnology; Nanoscale Science and Technology;
• 出版者：Springer Berlin Heidelberg
• ISSN：2150-5551
• 卷排序：8

文摘

Many temperature indicators or sensors show color changes for materials used in food and medical fields. However, they are not helpful for a color-blind person or children who lack judgment. In this paper, we introduce simply fabricated and more useful low-temperature indicator (~30 °C) for devices that actuates using paraffin-infiltrated multi-walled carbon nanotube (MWCNT) coiled yarn. The density difference of MWCNT yarn provides large strain (~330 %) when heat causes the melted polymer to move. Furthermore, the MWCNT yarn decreases the melting point of paraffin. These properties allow control of the actuating temperature. In addition, mechanical strength was enhanced by MWCNT than previously reported temperature-responsive actuators based on shape memory polymers. This simply fabricated temperature indicator can be applied in latching devices for medical and biological fields.KeywordsTime–temperatureActuatorCarbon nanotubeParaffinCoiled yarnDual-Archimedean