Increased water retention in polymer electrolyte membranes at elevated temperatures assisted by capillary condensation

Moon Jeong Park; Kenneth H. Downing; Andrew Jackson; Enrique D. Gomez; Andrew M. Minor; David Cookson; Adam Z. Weber; Nitash P. Balsara

doi:10.1021/nl072617l

Increased water retention in polymer electrolyte membranes at elevated temperatures assisted by capillary condensation

Moon Jeong Park, Kenneth H. Downing, Andrew Jackson, Enrique D. Gomez, Andrew M. Minor, David Cookson, Adam Z. Weber, Nitash P. Balsara

Research output: Contribution to journal › Article › peer-review

201 Scopus citations

Abstract

We establish a new systematic methodology for controlling the water retention of polymer electrolyte membranes. Block copolymer membranes comprising hydrophilic phases with widths ranging from 2 to 5 nm become wetter as the temperature of the surrounding air is increased at constant relative humidity. The widths of the moist hydrophilic phases were measured by cryogenic electron microscopy experiments performed on humid membranes. Simple calculations suggest that capillary condensation is important at these length scales. The correlation between moisture content and proton conductivity of the membranes is demonstrated.

Original language	English (US)
Pages (from-to)	3547-3552
Number of pages	6
Journal	Nano letters
Volume	7
Issue number	11
DOIs	https://doi.org/10.1021/nl072617l
State	Published - Nov 2007

All Science Journal Classification (ASJC) codes

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl072617l

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abstract = "We establish a new systematic methodology for controlling the water retention of polymer electrolyte membranes. Block copolymer membranes comprising hydrophilic phases with widths ranging from 2 to 5 nm become wetter as the temperature of the surrounding air is increased at constant relative humidity. The widths of the moist hydrophilic phases were measured by cryogenic electron microscopy experiments performed on humid membranes. Simple calculations suggest that capillary condensation is important at these length scales. The correlation between moisture content and proton conductivity of the membranes is demonstrated.",

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T1 - Increased water retention in polymer electrolyte membranes at elevated temperatures assisted by capillary condensation

AU - Park, Moon Jeong

AU - Downing, Kenneth H.

AU - Jackson, Andrew

AU - Gomez, Enrique D.

AU - Minor, Andrew M.

AU - Cookson, David

AU - Weber, Adam Z.

AU - Balsara, Nitash P.

PY - 2007/11

Y1 - 2007/11

N2 - We establish a new systematic methodology for controlling the water retention of polymer electrolyte membranes. Block copolymer membranes comprising hydrophilic phases with widths ranging from 2 to 5 nm become wetter as the temperature of the surrounding air is increased at constant relative humidity. The widths of the moist hydrophilic phases were measured by cryogenic electron microscopy experiments performed on humid membranes. Simple calculations suggest that capillary condensation is important at these length scales. The correlation between moisture content and proton conductivity of the membranes is demonstrated.

AB - We establish a new systematic methodology for controlling the water retention of polymer electrolyte membranes. Block copolymer membranes comprising hydrophilic phases with widths ranging from 2 to 5 nm become wetter as the temperature of the surrounding air is increased at constant relative humidity. The widths of the moist hydrophilic phases were measured by cryogenic electron microscopy experiments performed on humid membranes. Simple calculations suggest that capillary condensation is important at these length scales. The correlation between moisture content and proton conductivity of the membranes is demonstrated.

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EP - 3552

JO - Nano letters

JF - Nano letters

IS - 11

ER -

Increased water retention in polymer electrolyte membranes at elevated temperatures assisted by capillary condensation

Abstract

All Science Journal Classification (ASJC) codes

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