期刊
SMALL
卷 14, 期 38, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201801883
关键词
artificial muscle; carbon nanotube; electrochemical muscle; graphene; yarn muscle
类别
资金
- National Natural Science Foundation of China [21603264, 21773293]
- CAS Pioneer Hundred Talents Program
- National Key Research and Development Program of China [2016YFA0203301]
- Key Research Program of Frontier Science of Chinese Academy of Sciences [QYZDB-SSW-SLH031]
- Air Force Office of Scientific Research [FA9550-15-1-0089]
- Robert A. Welch Foundation [AT-0029]
Artificial muscles are reported in which reduced graphene oxide (rGO) is trapped in the helical corridors of a carbon nanotube (CNT) yarn. When electrochemically driven in aqueous electrolytes, these coiled CNT/rGO yarn muscles can contract by 8.1%, which is over six times that of the previous results for CNT yarn muscles driven in an inorganic electrolyte (1.3%). They can contract to provide a final stress of over 14 MPa, which is about 40 times that of natural muscles. The hybrid yarn muscle shows a unique catch state, in which 95% of the contraction is retained for 1000 s following charging and subsequent disconnection from the power supply. Hence, they are unlike thermal muscles and natural muscles, which need to consume energy to maintain contraction. Additionally, these muscles can be reversibly cycled while lifting heavy loads.
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