期刊
NANOSCALE
卷 10, 期 17, 页码 8180-8186出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nr01300d
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资金
- National Natural Science Foundation of China [21603264, 21473238, 21503267]
- National Key Research and Development Prog of China [2016YFA0203301]
- CAS Pioneer Hundred Talents Programme
- Key Research Programme of Frontier Science of the Chinese Academy of Sciences [QYZDB-SSW-SLH031]
Artificial yarn/fiber muscles have recently attracted considerable interest for various applications. These muscles can provide large-stroke tensile and torsional actuations, resulting from inserted twists. However, tensional tethering of twisted muscles is generally needed to avoid muscle snarling and untwisting. In this paper a carbon nanotube (CNT) yarn muscle that is tethering-free and twist-stable is reported. The yarn muscle is prepared by allowing the self-plying of a coiled CNT yarn. When driven by acetone adsorption, this muscle shows decoupled actuations, which provide fast and reversible similar to 13.3% contraction strain against a constant stress corresponding to similar to 38000 times the muscle weight but almost zero torsional strokes. The cycling test shows that the self-plied muscle has very good structural stability and actuation reversibility. Applied joule heating can help increase the desorption of acetone and increase the operation frequency of the self-plied muscle. Furthermore, by controlling the coupling between the joule heating and acetone adsorption/desorption, tensile actuations from negative to positive have been achieved. This twist-stable feature could considerably facilitate the practical applications of such muscle.'
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