Mechanoelectric effects in ionic gels
2000; Institute of Physics; Volume: 50; Issue: 4 Linguagem: Inglês
10.1209/epl/i2000-00299-3
ISSN1286-4854
AutoresP. G. de Gennes, Ko Okumura, Mohsen Shahinpoor, Kyeong Ja Kim,
Tópico(s)Membrane Separation and Gas Transport
ResumoCertain fluorinated ion-exchange membranes, when swollen and suitably plated by conducting electrodes, display a spontaneous curvature increasing with the applied electric field E(1). There is also an inverse effect, where an imposed curvature induces an electric field (in open circuit conditions). We present here a compact description of these effects in the linear regime, and in static conditions: this is based on linear irreversible thermodynamics, with two driving forces (E and a water pressure gradient ∇p) and two fluxes (electric current and water current). We also give some qualitative estimates of the three Onsager coefficients which come into play.
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