Sheath-run artificial muscles
Sheath-run artificial muscles
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DOI：
10.1126/science.aaw2403
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发表时间：
2019-07-12
期刊：
影响因子：
56.9
通讯作者：
Baughman, Ray H.
中科院分区：
文献类型：
--
作者：
Mu, Jiuke;de Andrade, Monica Jung;Baughman, Ray H.
虽然来宾填充碳纳米管纱线作为扭转和拉伸人造肌肉提供了创纪录的性能，但它们价格昂贵，而且只有部分肌肉有效地促进了驱动。我们描述了一种提供更高性能的肌肉类型，其中驱动驱动的来宾是扭曲或卷曲芯上的鞘，可以是廉价的纱线。这种从客人填充到鞘运行的人造肌肉的变化使电热或蒸汽吸收驱动的拉伸肌肉的最大工作能力增加了1.70到2.15倍。鞘运行的电化学肌肉每克平均收缩功率为1.98瓦，是人类肌肉的40倍，是最高功率替代电化学肌肉的9.0倍。理论预测了观察到的鞘跑肌肉的性能优势。
Although guest-filled carbon nanotube yarns provide record performance as torsional and tensile artificial muscles, they are expensive, and only part of the muscle effectively contributes to actuation. We describe a muscle type that provides higher performance, in which the guest that drives actuation is a sheath on a twisted or coiled core that can be an inexpensive yarn. This change from guest-filled to sheath-run artificial muscles increases the maximum work capacity by factors of 1.70 to 2.15 for tensile muscles driven electrothermally or by vapor absorption. A sheath-run electrochemical muscle generates 1.98 watts per gram of average contractile power-40 times that for human muscle and 9.0 times that of the highest power alternative electrochemical muscle. Theory predicts the observed performance advantages of sheath-run muscles.