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Madou, Mark
BIO-MEMS Lab
Research Interests
  • Medical Diagnostics

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Water trans port in a non-aqueous, polypyrrole electrochemical cell

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Title
Water trans port in a non-aqueous, polypyrrole electrochemical cell
Author
Xu, HKonovalov, VVContescu, CIJaffe, SAMadou, Mark
Keywords
Humidity; Polypyrrole film; Propylene carbonate; Water transport
Issue Date
200603
Publisher
ELSEVIER SCIENCE SA
Citation
SENSORS AND ACTUATORS B-CHEMICAL, v.114, no.1, pp.248 - 253
Abstract
A conducting polymer based liquid membrane electrochemical cell is presented in which reversible water transport in propylene carbonate (PC) is achieved by applying a dc voltage across the cell. In a cell two electrochemically deposited polypyrrole (PPy) films are utilized together with a porous separator filled with an electrolyte solution to make a sandwich structure, and the water vapor pressure adjacent to each electrode is measured. Under a cycling electrode potential the movement of solvated ions across the cell reversibly transports water. PPy films with different dopant anions (BF 4 -, PF 6 -, DBS -) are tested in PC solutions containing corresponding anions and different cations (Li +, Na +, TBA +). Water activity increases at the cathode and decreases at the anode. Water transport numbers for different liquid membrane systems are estimated and discussed.
URI
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DOI
http://dx.doi.org/10.1016/j.snb.2005.04.039
ISSN
0925-4005
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