Strain Rate Effects in the Mechanical Response of Polymer-Anchored Carbon Nanotube Foams

Authors

  • Abha Misra,

    1. Graduate Aeronautical Laboratories (GALCIT) California Institute of Technology Pasadena, CA, 91125 (USA)
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  • Julia R. Greer,

    1. Materials Science and Mechanical Engineering California Institute of Technology Pasadena, CA, 91125 (USA)
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  • Chiara Daraio

    Corresponding author
    1. Graduate Aeronautical Laboratories (GALCIT), and Applied Physics California Institute of Technology Pasadena, CA, 91125 (USA)
    • Graduate Aeronautical Laboratories (GALCIT), and Applied Physics California Institute of Technology Pasadena, CA, 91125 (USA).
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  • C.D. and J.R.G. wish to acknowledge the support of this work by their Caltech start-up funds, A.M. acknowledges support by the Moore Fellowship. The authors also thank C. Kovalchick for his support on the CNTs/polymer adhesion tests and C. Garland on TEM supervision.

Abstract

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Strain rate effects on the mechanical properties of carbon nanotube forests are studied, and several related interesting new phenomena are reported. Dense vertically aligned foam-like forests of carbon nanotubes are anchored on a thin, flexible polymer layer to provide structural stability, particularly at the higher strain rates. Permanent deformation and for the first time the delamination and crumbling of carbon nanotube walls is observed.

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