TITLE

Auxetic materials with large negative Poisson’s ratios based on highly oriented carbon nanotube structures

AUTHOR(S)
Luzhuo Chen; Changhong Liu; Jiaping Wang; Wei Zhang; Chunhua Hu; Shoushan Fan
PUB. DATE
June 2009
SOURCE
Applied Physics Letters;6/22/2009, Vol. 94 Issue 25, p253111
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Auxetic materials with large negative Poisson’s ratios are fabricated by highly oriented carbon nanotube structures. The Poisson’s ratio can be obtained down to -0.50. Furthermore, negative Poisson’s ratios can be maintained in the carbon nanotube/polymer composites when the nanotubes are embedded, while the composites show much better mechanical properties including larger strain-to-failure (∼22%) compared to the pristine nanotube thin film (∼3%). A theoretical model is developed to predict the Poisson’s ratios. It indicates that the large negative Poisson’s ratios are caused by the realignment of curved nanotubes during stretching and the theoretical predictions agree well with the experimental results.
ACCESSION #
42642383

 

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