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Title: Capillary Penetration Method for Measuring Wetting Properties of Carbon Ionomer Films for Proton Exchange Membrane Fuel Cell (PEMFC) Applications

Abstract

In this work, capillary rise experiments were performed to assess the wetting properties of carbon-ionomer (CI) films. The samples were attached to a micro-balance and then immersed into liquid water to (i) measure the mass gain from the liquid uptake and (ii) estimate the (external) contact angle to water (typical value around 140°). The results showed that drying the CI films under low vacuum significantly impacted the CI film wettability. The influence of the ionomer content on the CI films' wettability was investigated with various ionomer to carbon (I/C) ratios: 0.8, 1.0, 1.2 and 1.4. No significant variation of the contact angle to water extracted from the capillary rise experiment was measured. However, water uptake increased with the I/C ratio suggesting a more hydrophilic behavior. This observation was in good agreement with the measurement from the sessile drop method showing a slight decrease of the contact angle to water: from 155° for an I/C of 0.8 to 135° for I/C = 1.4.

Authors:
ORCiD logo; ; ; ; ;
Publication Date:
Research Org.:
3M Company, Maplewood, MN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1509938
Alternate Identifier(s):
OSTI ID: 1613421
Grant/Contract Number:  
EE0007270
Resource Type:
Published Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Name: Journal of the Electrochemical Society Journal Volume: 166 Journal Issue: 7; Journal ID: ISSN 0013-4651
Publisher:
IOP Publishing - The Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Electrochemistry; Materials Science

Citation Formats

Abbou, S., Tajiri, K., Alofari, K. T., Médici, E. F., Haug, A. T., and Allen, J. S. Capillary Penetration Method for Measuring Wetting Properties of Carbon Ionomer Films for Proton Exchange Membrane Fuel Cell (PEMFC) Applications. United States: N. p., 2019. Web. doi:10.1149/2.0271907jes.
Abbou, S., Tajiri, K., Alofari, K. T., Médici, E. F., Haug, A. T., & Allen, J. S. Capillary Penetration Method for Measuring Wetting Properties of Carbon Ionomer Films for Proton Exchange Membrane Fuel Cell (PEMFC) Applications. United States. doi:10.1149/2.0271907jes.
Abbou, S., Tajiri, K., Alofari, K. T., Médici, E. F., Haug, A. T., and Allen, J. S. Tue . "Capillary Penetration Method for Measuring Wetting Properties of Carbon Ionomer Films for Proton Exchange Membrane Fuel Cell (PEMFC) Applications". United States. doi:10.1149/2.0271907jes.
@article{osti_1509938,
title = {Capillary Penetration Method for Measuring Wetting Properties of Carbon Ionomer Films for Proton Exchange Membrane Fuel Cell (PEMFC) Applications},
author = {Abbou, S. and Tajiri, K. and Alofari, K. T. and Médici, E. F. and Haug, A. T. and Allen, J. S.},
abstractNote = {In this work, capillary rise experiments were performed to assess the wetting properties of carbon-ionomer (CI) films. The samples were attached to a micro-balance and then immersed into liquid water to (i) measure the mass gain from the liquid uptake and (ii) estimate the (external) contact angle to water (typical value around 140°). The results showed that drying the CI films under low vacuum significantly impacted the CI film wettability. The influence of the ionomer content on the CI films' wettability was investigated with various ionomer to carbon (I/C) ratios: 0.8, 1.0, 1.2 and 1.4. No significant variation of the contact angle to water extracted from the capillary rise experiment was measured. However, water uptake increased with the I/C ratio suggesting a more hydrophilic behavior. This observation was in good agreement with the measurement from the sessile drop method showing a slight decrease of the contact angle to water: from 155° for an I/C of 0.8 to 135° for I/C = 1.4.},
doi = {10.1149/2.0271907jes},
journal = {Journal of the Electrochemical Society},
number = 7,
volume = 166,
place = {United States},
year = {2019},
month = {4}
}

Journal Article:
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DOI: 10.1149/2.0271907jes

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