Mechanoelectric effects in ionic gels

Author： de Gennes P. G.   Okumura Ko   Shahinpoor M.   Kim K. J.  

Publisher： Edp Sciences

E-ISSN： 1286-4854|50|4|513-518

ISSN： 0295-5075

Source： EPL (EUROPHYSICS LETTERS), Vol.50, Iss.4, 2010-03, pp. : 513-518

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

Certain fluorinated ion-exchange membranes, when swollen and suitably platedby conducting electrodes, display a spontaneous curvature increasing withthe applied electric field $E^{(1)}$. There is also an inverseeffect, where an imposed curvature induces an electric field (in opencircuit conditions). We present here a compact description of these effectsin the linear regime, and in static conditions: this is based on linearirreversible thermodynamics, with two driving forces ({E} and a waterpressure gradient $\nabla p$) and two fluxes (electric current and watercurrent). We also give some qualitative estimates of the three Onsagercoefficients which come into play.

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