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Steady State and Dynamic Response of Voltage-Operated Membrane Gates

Department of Engineering, Aarhus University, Hangoevej 2, 8200 Aarhus N, Denmark
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Membranes 2019, 9(3), 34; https://doi.org/10.3390/membranes9030034
Received: 30 January 2019 / Revised: 19 February 2019 / Accepted: 25 February 2019 / Published: 2 March 2019
(This article belongs to the Special Issue Development of Membranes in Battery & Membrane Based Devices)
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Abstract

An electrochemical flow cell with Nafion 212, aqueous LiI/I 2 redox solution, and carbon paper electrode was operated as an electro-osmotic gate based on the Electrokinetic Energy Conversion (EKEC) principle. The gate was operated in different modes. (i) In normal DC pump operation it is shown to follow the predictions from the phenomenological transport equations. (ii) Furthermore, it was also demonstrated to operate as a normally open, voltage-gated valve for microfluidic purposes. For both pump and valve operations low energy requirements (mW range) were estimated for precise control of small flows ( μ L range). (iii) Finally, the dynamic response of the pump was investigated by using alternating currents at a range of different frequencies. View Full-Text
Keywords: electrokinetic phenomena; dynamic response; membrane-based gate electrokinetic phenomena; dynamic response; membrane-based gate
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Østedgaard-Munck, D.N.; Catalano, J.; Bentien, A. Steady State and Dynamic Response of Voltage-Operated Membrane Gates. Membranes 2019, 9, 34.

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