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Measurement of water uptake in thin-film Nafion and anion alkaline exchange membranes using the quartz crystal microbalance

Bharath, VJ; Millichamp, J; Neville, TP; Mason, TJ; Shearing, PR; Brown, RJC; Manos, G; (2016) Measurement of water uptake in thin-film Nafion and anion alkaline exchange membranes using the quartz crystal microbalance. Journal of Membrane Science , 497 pp. 229-238. 10.1016/j.memsci.2015.09.027. Green open access

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Abstract

Water uptake, sorption mechanics and swelling characteristics of thin-film Nafion and a commercially available Tokuyama alkaline anion exchange membrane ionomer from the vapour phase is explored using a quartz crystal microbalance (QCM). The water uptake measures the number of water molecules adsorbed by the ionomer per functional group and is determined in-situ using the QCM frequency responses allowing for comparison with nanogram precision. Crystal admittance spectroscopy, along with equivalent circuit fitting, is applied to both thin films for the first time and is used to investigate the ionomer's viscoelastic changes during hydration; to elucidate the mechanisms at play during low, medium and high relative humidities.

Type: Article
Title: Measurement of water uptake in thin-film Nafion and anion alkaline exchange membranes using the quartz crystal microbalance
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.memsci.2015.09.027
Publisher version: http://dx.doi.org/10.1016/j.memsci.2015.09.027
Language: English
Additional information: Copyright © 2016. This manuscript version is published under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International licence (CC BY-NC-ND 4.0). This licence allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licences are available at http://creativecommons.org/licenses/by/4.0.
Keywords: Fuel cell water management, Solid polymer electrolyte, Membrane swelling, Crystal admittance spectroscopy, Quartz crystal microbalance
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1476291
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