Journal
NANOSCALE
Volume 8, Issue 41, Pages 17881-17886Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nr06185k
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Funding
- National Basic Research Program of China [2012CB932302]
- National Natural Science Foundation of China [51172271, 51372269]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09040202]
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Hybrid hydro-responsive actuators are developed by infiltrating carbon nanotube yarns using poly (3,4-ethylenedioxythiophene): poly(styrenesulfonate). These actuators demonstrate impressive rotation and contraction in response to water due to volumetric expansion of the helical arrangement of carbon nanotubes. The total torsional stroke is 3720 revolutions per m and the simultaneously generated contractive strain reaches 24% at a paddle-to-yarn mass ratio of 350. The contraction output can furthermore be significantly enhanced by constraining the rotational motion and it reaches 68% with an applied stress of 1 MPa. Additionally, hybrid yarns exhibit an approximately linear response to humidity changes and show extra capability of electrical actuation, which, combined with the excellent hydro-actuation performance, endow them with great potential for a variety of applications including artificial muscles, hydro-driven generators, moisture switches and microfluidic mixers.
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