Measurement of Water Uptake and States in Nafion Membranes Using Humidity-Controlled Terahertz Time-Domain Spectroscopy

School of Engineering

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Chemical Engineering Research Group

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https://doi.org/10.1021/acssuschemeng.4c01820
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Available under license: CC BY: Creative Commons Attribution 4.0 International License

Keywords

membrane hydration, proton-exchange membranes, terahertz spectroscopy, water states

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Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Measurement of Water Uptake and States in Nafion Membranes Using Humidity-Controlled Terahertz Time-Domain Spectroscopy. / Ludlam, George A. H.; Gnaniah, Sam J. P.; Degl’Innocenti, Riccardo et al.
In: ACS Sustainable Chemistry and Engineering, Vol. 12, No. 20, 20.05.2024, p. 7924-7934.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Bibtex

@article{62b3506670d2453693ea4919a1f878e6,

title = "Measurement of Water Uptake and States in Nafion Membranes Using Humidity-Controlled Terahertz Time-Domain Spectroscopy",

abstract = "Perfluorinated sulfonic acid ionomers are well known for their unique water uptake properties and chemical/mechanical stability. Understanding their performance–stability trade-offs is key to realizing membranes with optimal properties. Terahertz time-domain spectroscopy has been demonstrated to resolve water states inside industrially relevant membranes, producing qualitatively agreeable results to conventional gravimetric analysis and prior demonstrations. Using the proposed humidity-controlled terahertz time-domain spectroscopy, here we quantify this detailed water information inside commercially available Nafion membranes at various humidities for direct comparison against literature values from dynamic vapor sorption, differential scanning calorimetry, and Fourier transform infrared spectroscopy on selected samples. Using this technique therefore opens up opportunities for rapid future parameter space investigation for membrane optimization.",

keywords = "membrane hydration, proton-exchange membranes, terahertz spectroscopy, water states",

author = "Ludlam, {George A. H.} and Gnaniah, {Sam J. P.} and Riccardo Degl{\textquoteright}Innocenti and Gaurav Gupta and Wain, {Andrew J.} and Hungyen Lin",

year = "2024",

month = may,

day = "20",

doi = "10.1021/acssuschemeng.4c01820",

language = "English",

volume = "12",

pages = "7924--7934",

journal = "ACS Sustainable Chemistry and Engineering",

issn = "2168-0485",

publisher = "American Chemical Society",

number = "20",

}

RIS

TY - JOUR

T1 - Measurement of Water Uptake and States in Nafion Membranes Using Humidity-Controlled Terahertz Time-Domain Spectroscopy

AU - Ludlam, George A. H.

AU - Gnaniah, Sam J. P.

AU - Degl’Innocenti, Riccardo

AU - Gupta, Gaurav

AU - Wain, Andrew J.

AU - Lin, Hungyen

PY - 2024/5/20

Y1 - 2024/5/20

N2 - Perfluorinated sulfonic acid ionomers are well known for their unique water uptake properties and chemical/mechanical stability. Understanding their performance–stability trade-offs is key to realizing membranes with optimal properties. Terahertz time-domain spectroscopy has been demonstrated to resolve water states inside industrially relevant membranes, producing qualitatively agreeable results to conventional gravimetric analysis and prior demonstrations. Using the proposed humidity-controlled terahertz time-domain spectroscopy, here we quantify this detailed water information inside commercially available Nafion membranes at various humidities for direct comparison against literature values from dynamic vapor sorption, differential scanning calorimetry, and Fourier transform infrared spectroscopy on selected samples. Using this technique therefore opens up opportunities for rapid future parameter space investigation for membrane optimization.

AB - Perfluorinated sulfonic acid ionomers are well known for their unique water uptake properties and chemical/mechanical stability. Understanding their performance–stability trade-offs is key to realizing membranes with optimal properties. Terahertz time-domain spectroscopy has been demonstrated to resolve water states inside industrially relevant membranes, producing qualitatively agreeable results to conventional gravimetric analysis and prior demonstrations. Using the proposed humidity-controlled terahertz time-domain spectroscopy, here we quantify this detailed water information inside commercially available Nafion membranes at various humidities for direct comparison against literature values from dynamic vapor sorption, differential scanning calorimetry, and Fourier transform infrared spectroscopy on selected samples. Using this technique therefore opens up opportunities for rapid future parameter space investigation for membrane optimization.

KW - membrane hydration

KW - proton-exchange membranes

KW - terahertz spectroscopy

KW - water states

U2 - 10.1021/acssuschemeng.4c01820

DO - 10.1021/acssuschemeng.4c01820

M3 - Journal article

VL - 12

SP - 7924

EP - 7934

JO - ACS Sustainable Chemistry and Engineering

JF - ACS Sustainable Chemistry and Engineering

SN - 2168-0485

IS - 20

ER -

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Keywords