Abstract：
Nature-similar muscle is one of the ultimate goals of advanced artificial muscle materials. Currently, a variety of chemical and natural materials have been gradually developed for the preparation of artificial muscles. However, due to the scarcity, biological exclusion, and poor flexibility of the abovementioned materials, it is still a challenging process to maximize the imitation of behaviors shown by real muscles and commercial development. Here, this article presents multidimensional wool yarn artificial muscles, and the wet response behavior of fibers is induced in yarn muscles successfully by virtue of weakening the water-repellent effect of wool scales. Wool artificial muscles are cost-effective and widely available and have good biocompatibility. In addition, wool fiber assemblies are structurally stable, soft, and flexible to be processed into artificial muscles with torsional, contractile, and even multilayered structures, enabling various wet-driven behaviors. On the basis of the theoretical model and numerical simulation, we explained and verified the working mechanism employed in wool artificial yarn muscles. Finally, the yarn muscle was integrated into a wool muscle group through the textile technology, followed by the application to robot bionic arms, displaying the great potential of wool artificial yarn muscles in bionic drivers and the intelligent textile industry.
摘要：
自然相似肌肉是先进人造肌肉材料的最终目标之一。目前,各种化学和天然材料已经逐渐被开发用于制备人造肌肉。然而,由于稀缺性,生物排斥,上述材料的柔韧性差，最大限度地模仿真实肌肉和商业发展所表现出的行为仍然是一个具有挑战性的过程。这里,本文介绍了多维羊毛纱人工肌肉，通过削弱羊毛鳞片的防水作用，成功地在纱线肌肉中诱导了纤维的湿响应行为。羊毛人造肌肉具有成本效益，可广泛使用，并具有良好的生物相容性。此外,羊毛纤维组件结构稳定，软,并且灵活地加工成扭转的人造肌肉，收缩，甚至是多层结构，实现各种湿驱动行为。在理论模型和数值模拟的基础上,我们解释并验证了羊毛人造纱线肌肉的工作机制。最后,通过纺织技术将纱线肌肉整合到羊毛肌肉组中，其次是机器人仿生手臂的应用，展示了羊毛人造纱肌肉在仿生驱动器和智能纺织行业的巨大潜力。
