Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/242940
Type: Artigo
Title: Hierarchically buckled sheath-core fibers for superelastic electronics, sensors, and muscles
Author: Liu, Z. F.
Fang, S.
Moura, F. A.
Ding, J. N.
Jiang, N.
Di, J.
Zhang, M.
Lepró, X.
Galvão, D. S.
Haines, C. S.
Yuan, N. Y.
Yin, S. G.
Lee, D. W.
Wang, R.
Wang, H. Y.
Lv, W.
Dong, C.
Zhang, R. C.
Chen, M. J.
Yin, Q.
Chong, Y. T.
Zhang, R.
Wang, X.
Lima, M. D.
Ovalle-Robles, R.
Qian, D.
Lu, H.
Baughman, R. H.
Abstract: Superelastic conducting fibers with improved properties and functionalities are needed for diverse applications. Here we report the fabrication of highly stretchable (up to 1320%) sheath-core conducting fibers created by wrapping carbon nanotube sheets oriented in the fiber direction on stretched rubber fiber cores. The resulting structure exhibited distinct short-and long-period sheath buckling that occurred reversibly out of phase in the axial and belt directions, enabling a resistance change of less than 5% for a 1000% stretch. By including other rubber and carbon nanotube sheath layers, we demonstrated strain sensors generating an 860% capacitance change and electrically powered torsional muscles operating reversibly by a coupled tension-to-torsion actuation mechanism. Using theory, we quantitatively explain the complementary effects of an increase in muscle length and a large positive Poisson's ratio on torsional actuation and electronic properties.
Superelastic conducting fibers with improved properties and functionalities are needed for diverse applications. Here we report the fabrication of highly stretchable (up to 1320%) sheath-core conducting fibers created by wrapping carbon nanotube sheets oriented in the fiber direction on stretched rubber fiber cores. The resulting structure exhibited distinct short-and long-period sheath buckling that occurred reversibly out of phase in the axial and belt directions, enabling a resistance change of less than 5% for a 1000% stretch. By including other rubber and carbon nanotube sheath layers, we demonstrated strain sensors generating an 860% capacitance change and electrically powered torsional muscles operating reversibly by a coupled tension-to-torsion actuation mechanism. Using theory, we quantitatively explain the complementary effects of an increase in muscle length and a large positive Poisson's ratio on torsional actuation and electronic properties.
Subject: Nanotubos de carbono
Anisotropia
Elasticidade
Country: Estados Unidos
Editor: American Association for the Advancement of Science
Citation: Hierarchically Buckled Sheath-core Fibers For Superelastic Electronics, Sensors, And Muscles. Amer Assoc Advancement Science, v. 349, p. 400-404 Jul-2015.
Rights: fechado
Identifier DOI: 10.1126/science.aaa7952
Address: https://science.sciencemag.org/content/349/6246/400
Date Issue: 2015
Appears in Collections:IFGW - Artigos e Outros Documentos

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