Mandrel-free fabrication of giant spring-index and stroke muscles for diverse applications.

IF 45.8 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Science Pub Date : 2025-03-07 Epub Date: 2025-03-06 DOI:10.1126/science.adr6708
Mengmeng Zhang, Shaoli Fang, Wenting Cai, Chi Huynh, Fatma Göktepe, Jiyoung Oh, Zhong Wang, Ishara Ekanayake, Özer Göktepe, Ray H Baughman
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引用次数: 0

Abstract

Methods for making high-spring-index polymer fiber or yarn muscles have required expensive fabrication by wrapping around a mandrel, which limits their practical applications. We demonstrate an inexpensive mandrel-free method for making polymer muscles that can have a spring index of >50 and a contractile tensile stroke exceeding 97%. This method enables the spring index to be varied along a muscle's length by varying the plying twist, resulting in muscles that transition between homochiral and heterochiral when either heated or cooled. We demonstrate use of these polymer muscles for robots and environmentally driven comfort-adjusting jackets. This mandrel-free method was used to make high-spring-index carbon nanotube yarns for mechanical energy harvesters, self-powered strain sensors, and solvent-driven and electrochemically driven artificial muscles.

无芯棒制造巨大的弹簧指数和冲程肌肉的各种应用。
制造高弹性指数聚合物纤维或纱线肌肉的方法需要绕着芯棒进行昂贵的制造,这限制了它们的实际应用。我们展示了一种廉价的无芯棒方法来制造聚合物肌肉,它的弹簧指数可以达到50,收缩拉伸行程超过97%。这种方法使弹簧指数沿着肌肉的长度变化,通过改变捻度,导致肌肉在加热或冷却时在同手性和异手性之间转换。我们展示了这些聚合物肌肉在机器人和环境驱动的舒适调节夹克上的应用。该方法用于制造高弹性指数的碳纳米管纱线,用于机械能收集器、自供电应变传感器以及溶剂驱动和电化学驱动的人造肌肉。
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来源期刊
Science
Science 综合性期刊-综合性期刊
CiteScore
61.10
自引率
0.90%
发文量
0
审稿时长
2.1 months
期刊介绍: Science is a leading outlet for scientific news, commentary, and cutting-edge research. Through its print and online incarnations, Science reaches an estimated worldwide readership of more than one million. Science’s authorship is global too, and its articles consistently rank among the world's most cited research. Science serves as a forum for discussion of important issues related to the advancement of science by publishing material on which a consensus has been reached as well as including the presentation of minority or conflicting points of view. Accordingly, all articles published in Science—including editorials, news and comment, and book reviews—are signed and reflect the individual views of the authors and not official points of view adopted by AAAS or the institutions with which the authors are affiliated. Science seeks to publish those papers that are most influential in their fields or across fields and that will significantly advance scientific understanding. Selected papers should present novel and broadly important data, syntheses, or concepts. They should merit recognition by the wider scientific community and general public provided by publication in Science, beyond that provided by specialty journals. Science welcomes submissions from all fields of science and from any source. The editors are committed to the prompt evaluation and publication of submitted papers while upholding high standards that support reproducibility of published research. Science is published weekly; selected papers are published online ahead of print.
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