High-Performance Natural Melanin/Poly(vinyl Alcohol-co-ethylene) Nanofibers/PA6 Fiber for Twisted and Coiled Fiber-Based Actuator
High-Performance Natural Melanin/Poly(vinyl Alcohol-co-ethylene) Nanofibers/PA6 Fiber for Twisted and Coiled Fiber-Based Actuator
复制标题
用于扭曲和卷曲纤维致动器的高性能天然黑色素/聚（乙烯醇-共聚-乙烯）纳米纤维/PA6纤维
DOI：
10.1007/s42765-020-00036-w
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发表时间：
2020-04-01
影响因子：
16.1
通讯作者：
Wang, Dong
中科院分区：
文献类型：
--
作者：
Chen, Jiahui;Pakdel, Esfandiar;Wang, Dong
扭曲和卷曲光纤驱动器由于其独特的结构可以提供对外界热刺激的机械响应而引起了人们的极大关注。基于天然黑色素/聚乙烯醇-乙烯共聚物（PVA-co-PE）纳米纤维/PA 6复合纤维，设计了一种超高速、轻量化的扭曲卷曲纤维驱动器。简单地说，首先使用喷涂方法将黑色素/PVA-co-PE纳米纤维涂覆在PA 6上，然后将复合纤维扭曲并涂覆以获得致动器。黑色素的光热特性是驱动器上级性能的主要原因，而PVA-co-PE纳米纤维的加入则使黑色素分布均匀，提高了驱动器的机械性能。这种独特的设计使得基于黑色素/NF/PA 6纤维的驱动器具有很高的性能，其扭转驱动可以达到14,000 rpm，在40 ℃的温差下最大拉伸驱动为-6.36%。此外，PA 6/NF/黑色素纤维的拉伸应力比PA 6长丝高约4倍。由于制备方法简单，环境友好，以及扭曲卷曲的黑色素/NFs/PA 6纤维基驱动器的优异效率，本研究突出了用于高性能纤维基驱动器的复合纤维的简易设计。这种基于光纤的驱动器在能量发生器中有很好的应用前景。
Twisted and coiled fiber-based actuators have drawn a great attention because their unique structure can provide mechanical response with the external thermal stimulus. Herein, an ultra-fast and light-weight twisted and coiled fiber-based actuator was designed based on a nature melanin/poly (vinyl alcohol-co-ethylene) (PVA-co-PE) nanofibers/PA6 composite fiber. In brief, PA6 was firstly coated by melanin/PVA-co-PE nanofibers using a spraying method, followed by the twisting and coating the composite fiber to obtain the actuator. The excellent photothermal property of melanin contributed to the superior performance of the actuator, whereas the PVA-co-PE nanofibers was responsible for the uniform distribution of melanin and the enhanced mechanical property of the prepared-actuator. This unique design has led to the high performance of the melanin/NFs/PA6 fiber-based actuator, whose torsion actuation can reach to 14,000 rpm, and maximum tensile actuation was-6.36% at temperature difference of 40 ?. In addition, the tensile stress of PA6/NFs/melanin fiber was about four times higher than PA6 filaments. Owing to the simple and environmental-benign preparation method, as well as the excellent efficiency of twisted and coiled melanin/NFs/PA6 fiber-based actuator, this study highlights the facile design of the composite fiber for high-performance fiber-based actuators. This fiber-based actuator is promising for application in energy generator.