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

被引：36

作者：

Bharath, V. J. ^{[1
]}

Millichamp, J. ^{[1
]}

Neville, T. P. ^{[1
,2
]}

Mason, T. J. ^{[1
]}

Shearing, P. R. ^{[1
]}

Brown, R. J. C. ^{[3
]}

Manos, G. ^{[1
]}

Brett, D. J. L. ^{[1
]}

机构：

[1] UCL, Dept Chem Engn, Electrochem Innovat Lab, London WC1E 7JE, England

[2] UCL, Ctr Nat Inspired Engn, London WC1E 7JE, England

[3] Natl Phys Lab, Teddington TW11 0LW, Middx, England

来源：

JOURNAL OF MEMBRANE SCIENCE | 2016年 / 497卷

基金：

英国工程与自然科学研究理事会;

关键词：

Fuel cell water management; Solid polymer electrolyte; Membrane swelling; Crystal admittance spectroscopy; Quartz crystal microbalance; FUEL-CELL; LIQUID-PHASE; TRANSPORT; SORPTION; ELECTROLYTES; METHANOL; IONOMER; SENSORS; ANGLE;

D O I：

10.1016/j.memsci.2015.09.027

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

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. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：229 / 238

页数：10

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