Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education, Intelligent Wearable Engineering Research Center of Qingdao, Qingdao University, Qingdao, Shandong 266071, P.R. China.
Department of Materials, The University of Manchester, Manchester M139PL, United Kingdom.
Nano Lett. 2021 Oct 13;21(19):8126-8134. doi: 10.1021/acs.nanolett.1c02578. Epub 2021 Sep 27.
Photothermal bimorph actuators have attracted considerable attention in intelligent devices because of their cordless control and lightweight and easy preparation. However, current photothermal bimorph actuators are mostly based on films or papers driven by near-infrared sources, which are deficient in flexibility and adaptability, restricting their potential in wearable applications. Herein, a bimorph textile actuator that can be scalably fabricated with a traditional textile route and autonomously triggered by sunlight is reported. The active layer and passive layer of the bimorph are constructed by polypropylene tape and a MXene-modified polyamide filament. Because of the opposite thermal expansion and MXene-enhanced photothermal efficiency (>260%) of the bimorph, the textile actuator presents effective deformation (1.38 cm) under low sunlight power (100 mW/cm). This work provides a new pathway for wearable sunlight-triggered actuators and finds attractive applications for smart textiles.
光热双金属致动器因其无线控制、重量轻且易于制备而在智能设备中引起了相当大的关注。然而，目前的光热双金属致动器主要基于由近红外光源驱动的薄膜或纸张，它们缺乏灵活性和适应性，限制了它们在可穿戴应用中的潜力。在此，报道了一种可以通过传统的纺织路线进行可扩展制造并且可以被阳光自主触发的双金属纺织致动器。双金属的主动层和被动层由聚丙烯带和 MXene 改性聚酰胺长丝构建。由于双金属的热膨胀相反和 MXene 增强的光热效率（>260%），在低阳光功率（100 mW/cm）下，该纺织致动器呈现出有效的变形（1.38 cm）。这项工作为可穿戴的阳光触发致动器提供了新的途径，并为智能纺织品找到了有吸引力的应用。
