Unipolar stroke, electroosmotic pump carbon nanotube yarn muscles

doi:10.1126/science.abc4538

GSTDTAP > 气候变化

DOI	10.1126/science.abc4538
	Unipolar stroke, electroosmotic pump carbon nanotube yarn muscles
	Hetao Chu; Xinghao Hu; Zhong Wang; Jiuke Mu; Na Li; Xiaoshuang Zhou; Shaoli Fang; Carter S. Haines; Jong Woo Park; Si Qin; Ningyi Yuan; Jiang Xu; Sameh Tawfick; Hyungjun Kim; Patrick Conlin; Maenghyo Cho; Kyeongjae Cho; Jiyoung Oh; Steven Nielsen; Kevin A. Alberto; Joselito M. Razal; Javad Foroughi; Geoffrey M. Spinks; Seon Jeong Kim; Jianning Ding; Jinsong Leng; Ray H. Baughman
	2021-01-29
发表期刊	Science
出版年	2021
英文摘要	Carbon nanotube yarns can be used as electrochemical actuators because infiltration with ions causes a contraction in length and an expansion in diameter. Either positive or negative ions can cause this effect. Chu et al. constructed an all-solid-state muscle that eliminated the need for an electrolyte bath, which may expand the potential for its use in applications. By infiltrating the yarns with charged polymers, the fibers start partially swollen, so the length can increase through the loss of ions. It is thus possible to increase the overall stroke of the muscle. Further, these composite materials show a surprising increase in stroke with scan rate. Science , this issue p. [494][1] Success in making artificial muscles that are faster and more powerful and that provide larger strokes would expand their applications. Electrochemical carbon nanotube yarn muscles are of special interest because of their relatively high energy conversion efficiencies. However, they are bipolar, meaning that they do not monotonically expand or contract over the available potential range. This limits muscle stroke and work capacity. Here, we describe unipolar stroke carbon nanotube yarn muscles in which muscle stroke changes between extreme potentials are additive and muscle stroke substantially increases with increasing potential scan rate. The normal decrease in stroke with increasing scan rate is overwhelmed by a notable increase in effective ion size. Enhanced muscle strokes, contractile work-per-cycle, contractile power densities, and energy conversion efficiencies are obtained for unipolar muscles. [1]: /lookup/doi/10.1126/science.abc4538
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/314013
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Hetao Chu,Xinghao Hu,Zhong Wang,et al. Unipolar stroke, electroosmotic pump carbon nanotube yarn muscles[J]. Science,2021.
APA	Hetao Chu.,Xinghao Hu.,Zhong Wang.,Jiuke Mu.,Na Li.,...&Ray H. Baughman.(2021).Unipolar stroke, electroosmotic pump carbon nanotube yarn muscles.Science.
MLA	Hetao Chu,et al."Unipolar stroke, electroosmotic pump carbon nanotube yarn muscles".Science (2021).