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Soft Mechanical Sensors through Reverse Actuation in Polypyrrole

Journal Article


Abstract


  • The phenomenon of voltage generated from a soft sensor using polypyrrole in response to mechanical deformation is described

    and investigated. The sensor consists of two polypyrrole layers in contact with an electrolyte and operates in bending mode in

    air. The magnitude and sign of the induced voltage was found to depend on the type of dopant counter-ions and the nature of

    the surrounding electrolyte. The mechanical sensor response is shown to be a reverse actuation, generating millivolt signals

    for millimeter sized deflections or < 1000 Cm3 charge for 1% strain in the polypyrrole layer. A model based on Deformation

    Induced Ion Flux has been proposed whereby the strain induced volume change in the polymer produces a shift in the Donnan

    equilibrium between mobile dopant ions inside the polymer and in the external electrolyte. A simple thermodynamic model

    provides reasonable estimates of the size of the voltage and charge produced.

Publication Date


  • 2007

Citation


  • Wu, Y., Alici, G., Madden, J. D., Spinks, G. Maxwell. & Wallace, G. G. (2007). Soft Mechanical Sensors through Reverse Actuation in Polypyrrole. Advanced Functional Materials, 17 (16), 3216-3222.

Scopus Eid


  • 2-s2.0-36049029425

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/4217

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 3216

End Page


  • 3222

Volume


  • 17

Issue


  • 16

Abstract


  • The phenomenon of voltage generated from a soft sensor using polypyrrole in response to mechanical deformation is described

    and investigated. The sensor consists of two polypyrrole layers in contact with an electrolyte and operates in bending mode in

    air. The magnitude and sign of the induced voltage was found to depend on the type of dopant counter-ions and the nature of

    the surrounding electrolyte. The mechanical sensor response is shown to be a reverse actuation, generating millivolt signals

    for millimeter sized deflections or < 1000 Cm3 charge for 1% strain in the polypyrrole layer. A model based on Deformation

    Induced Ion Flux has been proposed whereby the strain induced volume change in the polymer produces a shift in the Donnan

    equilibrium between mobile dopant ions inside the polymer and in the external electrolyte. A simple thermodynamic model

    provides reasonable estimates of the size of the voltage and charge produced.

Publication Date


  • 2007

Citation


  • Wu, Y., Alici, G., Madden, J. D., Spinks, G. Maxwell. & Wallace, G. G. (2007). Soft Mechanical Sensors through Reverse Actuation in Polypyrrole. Advanced Functional Materials, 17 (16), 3216-3222.

Scopus Eid


  • 2-s2.0-36049029425

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/4217

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 3216

End Page


  • 3222

Volume


  • 17

Issue


  • 16