Journal
CARBON
Volume 48, Issue 15, Pages 4450-4456Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2010.08.004
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The effect of twist and solvent densification on the internal structure of carbon nanotube yarns was revealed using focused ion beam milling and related to yarn strength through tensile testing. Denser carbon nanotube yarns with smaller diameters were produced either through solvent densification or with increasing twist densities from 5 to similar to 15 turns/mm, but led to only minor improvement in yarn tenacity. At twist densities greater than similar to 15 turns/mm, a core-sheath structure developed and was correlated with a decline in strength. The implications of bonding between the nanotubes in the twisted yarn are briefly considered. These results have implications for the future development of high strength carbon nanotube yarn. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
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