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9 April 2010 Modeling ionic polymer diluent response in sensing
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An ionic polymer transducer (IPT) may be employed as either an actuator or sensor, where the bending mode of transduction has frequently been studied. However, the electromechanical response is not symmetric; the voltage signal required to induce a given tip displacement in actuation is higher than that generated for the same deformation in sensing by an order of magnitude or more. Thus the physical mechanisms responsible for actuation and sensing are necessarily different. Because IPTs display sensing response for any mode of deformation (bending, tension, compression, shear), it is postulated that the mechanism of streaming potential dominates sensing response. The source of the streaming potential is the flow of entrained fluid and cations (electrolyte) with respect to the electrodes expected for any mode of deformation. In this study flow is assumed to be linear and Newtonian. Trends in the flow due to imposed shear are investigated. Implications of these trends in relation to physical regions of the polymer nanochannels will be explored
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Ursula T. Zangrilli and Lisa M. Weiland "Modeling ionic polymer diluent response in sensing", Proc. SPIE 7642, Electroactive Polymer Actuators and Devices (EAPAD) 2010, 76422Z (9 April 2010);

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