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Issue 14, 2012
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Electromechanical response and failure behaviour of aerogel-spun carbon nanotube fibres under tensile loading

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Abstract

The effect of tensile loading on the mechanical and electrical behaviour of carbon nanotube fibres spun continuously from an aerogel is discussed. While these fibres exhibit moderate strength (0.19 GPa) and elastic moduli (9.16 GPa), their piezoresistive behaviour, evaluated through active resistance measurements during tensile loading, demonstrates their potential for sensing applications in advanced composite materials. Insight into the failure behaviour of the aerogel-spun fibres is gained through microscopic examination of the failed fibres, as well as analysis of their electrical response. A new phenomenon for carbon nanotube fibres is reported—the aerogel-spun fibres are observed to undergo mild to severe kinking due to tensile failure. This kinking is attributed to compressive failure due to recoil from the fibre free ends. A simple analysis of experimental results yields a fibre compressive strength range of 172–177 MPa.

Graphical abstract: Electromechanical response and failure behaviour of aerogel-spun carbon nanotube fibres under tensile loading

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Publication details

The article was received on 14 Nov 2011, accepted on 25 Jan 2012 and first published on 27 Feb 2012


Article type: Paper
DOI: 10.1039/C2JM15869H
Citation: J. Mater. Chem., 2012,22, 6792-6798
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    Electromechanical response and failure behaviour of aerogel-spun carbon nanotube fibres under tensile loading

    A. S. Wu, T. Chou, J. W. Gillespie, D. Lashmore and J. Rioux, J. Mater. Chem., 2012, 22, 6792
    DOI: 10.1039/C2JM15869H

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