Bio-Inspired, Moisture-Powered Hybrid Carbon Nanotube Yarn Muscles

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Bio-Inspired, Moisture-Powered Hybrid Carbon Nanotube Yarn Muscles

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Title: Bio-Inspired, Moisture-Powered Hybrid Carbon Nanotube Yarn Muscles
Author(s):
Kim, Shi Hyeong;
Kwon, Cheong Hoon;
Park, Karam;
Mun, Tae Jin;
Lepro, Xavier;
Baughman, Ray H.;
Spinks, Geoffrey M.;
Kim, Seon Jeong
Date Created: 2016-03-14
Item Type: article
Keywords: Materials science
Nanotechnology
Carbon nanotubes
Description: Includes supplementary material
Abstract: Hygromorph artificial muscles are attractive as self-powered actuators driven by moisture from the ambient environment. Previously reported hygromorph muscles have been largely limited to bending or torsional motions or as tensile actuators with low work and energy densities. Herein, we developed a hybrid yarn artificial muscle with a unique coiled and wrinkled structure, which can be actuated by either changing relative humidity or contact with water. The muscle provides a large tensile stroke (up to 78%) and a high maximum gravimetric work capacity during contraction (2.17 kJ kg⁻¹), which is over 50 times that of the same weight human muscle and 5.5 times higher than for the same weight spider silk, which is the previous record holder for a moisture driven muscle. We demonstrate an automatic ventilation system that is operated by the tensile actuation of the hybrid muscles caused by dew condensing on the hybrid yarn. This self-powered humidity-controlled ventilation system could be adapted to automatically control the desired relative humidity of an enclosed space.
ISSN: 2045-2322
Source: Scientific Reports
Link to Related Resource: http://dx.doi.org/10.1038/srep23016
Persistent Link: http://hdl.handle.net/10735.1/5748
Bibliographic Citation: Kim, Shi Hyeong, Cheong Hoon Kwon, Karam Park, Tae Jin Mun, et al. 2016. "Bio-inspired, moisture-powered hybrid carbon nanotube yarn muscles." Scientific Reports 6(23016), doi: 10.1038/srep23016
Terms of Use: CC BY 4.0 (Attribution)
©2016 The Authors. All Rights Reserved.
Sponsors: Creative Research Initiative Center for Self-powered Actuation and the Korea-US Air Force Cooperation Program Grant (no. 2013K1A3A1A32035592); Air Force Office of Scientific Research (grant nos. FA9550-15-1-0089, FA2386-13-1- 4119); Robert A. Welch Foundation grant (no. AT-0029). Additional support was from the Australian Research Council Discovery Grant (DP110101073).

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CC BY 4.0 (Attribution) Except where otherwise noted, this item's license is described as CC BY 4.0 (Attribution)