Abstract
This study reports a new method to determine the effective diffusivity of nanoscale ion–water clusters within ion-exchange membranes by means of osmo-electric techniques. The reported method is to induce osmo-electric motion (endo-ionic in nature) within ion-exchange membranes, when a normal load is applied, so as to produce a voltage across the thickness of the membrane. A materials testing system was used to apply a set of consistent pure compressive loads of 200 and 350 N across the surface of an ion-exchange membrane, Nafion TM, 2×2 cm 2 strip. The maximum output voltage for pressures of 200 N load ( 73 psi ) and 350 N ( 127 psi ) was 80 and 108 mV in amplitude, respectively. The dynamic behavior of induced voltages was also obtained and analyzed based upon the ion–water transport mobility aspect.
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