Water sorption and diffusional properties of a cured epoxy resin measured using alternating ionic liquids/aqueous electrolytes in electrochemical impedance spectroscopy

Brian R. Hinderliter; Kerry N. Allahar; Gordon P. Bierwagen; Dennis E. Tallman; Stuart G. Croll

doi:10.1007/s11998-008-9107-7

Water sorption and diffusional properties of a cured epoxy resin measured using alternating ionic liquids/aqueous electrolytes in electrochemical impedance spectroscopy

Brian R. Hinderliter, Kerry N. Allahar, Gordon P. Bierwagen, Dennis E. Tallman, Stuart G. Croll

Mechanical & Industrial Engineering

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

18 Scopus citations

Abstract

The protective quality of a coating is often measured by how long it delays the arrival of water to the substrate. The transport of water in, redistribution within, and eventually through a coating to the substrate has long been investigated through electrochemical impedance spectroscopy (EIS). EIS measurements employing alternating nonaqueous (room temperature ionic liquids, RTIL) and aqueous electrolytes elucidated the behavior of water within the coating. Diffusion coefficients could be measured and the redistribution of water into percolating paths identified. The use of RTIL alternating with aqueous electrolytes allows determination of intrinsic properties (water volume fraction at saturation and relative dielectric) and kinetic properties predicted by the Brasher Kingsbury formulation. This article focuses on the sensitivity of these intrinsic and kinetic properties to test duration in an unique experimental method.

Original language	English (US)
Pages (from-to)	431-438
Number of pages	8
Journal	Journal of Coatings Technology and Research
Volume	5
Issue number	4
DOIs	https://doi.org/10.1007/s11998-008-9107-7
State	Published - Dec 2008

Bibliographical note

Funding Information:
Acknowledgment The authors would like to thank the US Air Force Office of Scientific Research, contract number FA9599-04-1-0368, and Army Research Laboratory, contract number W911NF-04-2-0029, for support of this research.

Keywords

Diffusion coefficient
Electrochemical impedance spectroscopy
Ionic liquids
Water uptake

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Water sorption and diffusional properties of a cured epoxy resin measured using alternating ionic liquids/aqueous electrolytes in electrochemical impedance spectroscopy. / Hinderliter, Brian R.; Allahar, Kerry N.; Bierwagen, Gordon P. et al.
In: Journal of Coatings Technology and Research, Vol. 5, No. 4, 12.2008, p. 431-438.

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

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abstract = "The protective quality of a coating is often measured by how long it delays the arrival of water to the substrate. The transport of water in, redistribution within, and eventually through a coating to the substrate has long been investigated through electrochemical impedance spectroscopy (EIS). EIS measurements employing alternating nonaqueous (room temperature ionic liquids, RTIL) and aqueous electrolytes elucidated the behavior of water within the coating. Diffusion coefficients could be measured and the redistribution of water into percolating paths identified. The use of RTIL alternating with aqueous electrolytes allows determination of intrinsic properties (water volume fraction at saturation and relative dielectric) and kinetic properties predicted by the Brasher Kingsbury formulation. This article focuses on the sensitivity of these intrinsic and kinetic properties to test duration in an unique experimental method.",

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note = "Funding Information: Acknowledgment The authors would like to thank the US Air Force Office of Scientific Research, contract number FA9599-04-1-0368, and Army Research Laboratory, contract number W911NF-04-2-0029, for support of this research.",

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AU - Bierwagen, Gordon P.

AU - Tallman, Dennis E.

AU - Croll, Stuart G.

N1 - Funding Information: Acknowledgment The authors would like to thank the US Air Force Office of Scientific Research, contract number FA9599-04-1-0368, and Army Research Laboratory, contract number W911NF-04-2-0029, for support of this research.

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N2 - The protective quality of a coating is often measured by how long it delays the arrival of water to the substrate. The transport of water in, redistribution within, and eventually through a coating to the substrate has long been investigated through electrochemical impedance spectroscopy (EIS). EIS measurements employing alternating nonaqueous (room temperature ionic liquids, RTIL) and aqueous electrolytes elucidated the behavior of water within the coating. Diffusion coefficients could be measured and the redistribution of water into percolating paths identified. The use of RTIL alternating with aqueous electrolytes allows determination of intrinsic properties (water volume fraction at saturation and relative dielectric) and kinetic properties predicted by the Brasher Kingsbury formulation. This article focuses on the sensitivity of these intrinsic and kinetic properties to test duration in an unique experimental method.

AB - The protective quality of a coating is often measured by how long it delays the arrival of water to the substrate. The transport of water in, redistribution within, and eventually through a coating to the substrate has long been investigated through electrochemical impedance spectroscopy (EIS). EIS measurements employing alternating nonaqueous (room temperature ionic liquids, RTIL) and aqueous electrolytes elucidated the behavior of water within the coating. Diffusion coefficients could be measured and the redistribution of water into percolating paths identified. The use of RTIL alternating with aqueous electrolytes allows determination of intrinsic properties (water volume fraction at saturation and relative dielectric) and kinetic properties predicted by the Brasher Kingsbury formulation. This article focuses on the sensitivity of these intrinsic and kinetic properties to test duration in an unique experimental method.

KW - Diffusion coefficient

KW - Electrochemical impedance spectroscopy

KW - Ionic liquids

KW - Water uptake

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Water sorption and diffusional properties of a cured epoxy resin measured using alternating ionic liquids/aqueous electrolytes in electrochemical impedance spectroscopy

Abstract

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