Kim Shi Hyeong, Kwon Cheong Hoon, Park Karam, Mun Tae Jin, Lepró Xavier, Baughman Ray H, Spinks Geoffrey M, Kim Seon Jeong
Center for Self-powered Actuation and Department of Biomedical Engineering, Hanyang University, Seoul 133-791, South Korea.
The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX 75083, USA.
Sci Rep. 2016 Mar 14;6:23016. doi: 10.1038/srep23016.
Hygromorph artificial muscles are attractive as self-powered actuators driven by moisture from the ambient environment. Previously reported hygromorph muscles have been largely limited to bending or torsional motions or as tensile actuators with low work and energy densities. Herein, we developed a hybrid yarn artificial muscle with a unique coiled and wrinkled structure, which can be actuated by either changing relative humidity or contact with water. The muscle provides a large tensile stroke (up to 78%) and a high maximum gravimetric work capacity during contraction (2.17 kJ kg(-1)), which is over 50 times that of the same weight human muscle and 5.5 times higher than for the same weight spider silk, which is the previous record holder for a moisture driven muscle. We demonstrate an automatic ventilation system that is operated by the tensile actuation of the hybrid muscles caused by dew condensing on the hybrid yarn. This self-powered humidity-controlled ventilation system could be adapted to automatically control the desired relative humidity of an enclosed space.
吸湿变形人工肌肉作为由周围环境中的水分驱动的自供电致动器很有吸引力。先前报道的吸湿变形肌肉在很大程度上仅限于弯曲或扭转运动，或者作为具有低功和能量密度的拉伸致动器。在此，我们开发了一种具有独特卷曲和褶皱结构的混合纱线人工肌肉，它可以通过改变相对湿度或与水接触来驱动。该肌肉在收缩过程中提供了较大的拉伸行程（高达78%）和较高的最大重量功容量（2.17 kJ kg(-1)），这是同等重量人类肌肉的50多倍，比同等重量的蜘蛛丝高5.5倍，而蜘蛛丝是之前吸湿驱动肌肉的记录保持者。我们展示了一种自动通风系统，该系统由混合纱线上凝结的露水引起的混合肌肉的拉伸驱动来运行。这种自供电湿度控制通风系统可用于自动控制封闭空间的所需相对湿度。
