Enhanced dynamic performance of twisted and coiled soft actuators using graphene coating
Enhanced dynamic performance of twisted and coiled soft actuators using graphene coating
复制标题
使用石墨烯涂层增强扭曲和卷绕软执行器的动态性能
DOI：
10.1016/j.compositesb.2019.107499
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发表时间：
2019-12-01
影响因子：
13.1
通讯作者：
Suk, Ji Won
中科院分区：
文献类型：
--
作者：
Piao, Chengxu;Jang, Hoyoung;Suk, Ji Won
由鱼线或缝纫线构成的扭转线圈驱动器（TCA）具有比功率高、行程大、制造成本低等优点，是最有前途的人工肌肉之一。由于TCA可以被热致动，因此致动器的热性质决定其致动性能。在这里，具有高热导率和低热质量的石墨烯材料被用作尼龙TCA表面上的涂层材料，以增强TCA的动态响应。将大面积单层石墨烯和多孔石墨烯泡沫包裹在TCA表面上，并分别将致动循环时间减少10.1%和17.8%。此外，高质量的多层石墨烯薄片被喷涂在TCA的表面上，显示出循环时间显著减少了30.9%。在脉冲电流输入的占空比下，由于石墨烯薄片涂层引起的增强的热传递也使TCA的最大应变增加了3倍以上。这证明了使用简单的涂覆方法来改善TCA的动态性能的替代方式。
Twisted and coiled actuators (TCAs) composed of fishing lines or sewing threads are one of the most promising artificial muscles because of their high specific power, large stroke, and low fabrication cost. Since the TCA can be thermally actuated, the thermal properties of the actuator determine its actuation performance. Here, graphene materials with high thermal conductivity and low thermal mass were used as coating materials on nylon TCA surfaces to enhance the dynamic responses of the TCA. Large-area monolayer graphene and porous graphene foam were wrapped on the TCA surface and provided a reduction of the actuation cycle times by 10.1 and 17.8%, respectively. Furthermore, high-quality multi-layer graphene flakes were spray-coated on the surface of the TCA, showing a dramatic decrease in the cycle time by 30.9%. The enhanced heat transfer due to the graphene flake coating also increased the maximum strain of the TCA over 3 times under a duty cycle of a pulsed current input. This demonstrates an alternative way to improve the dynamic performance of the TCA using a simple coating method.