Quantification of water states in thin proton exchange membrane manufacturing using terahertz time-domain spectroscopy

Ludlam, George and Alves De Lima, Decio and Li, Xiaoran and Coulson, B. and Nesling, E. and Degl'Innocenti, Riccardo and Dawson, Richard and Peruffo, M. and Lin, Hungyen (2022) Quantification of water states in thin proton exchange membrane manufacturing using terahertz time-domain spectroscopy. In: IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves :. UNSPECIFIED. ISBN 9781728194271

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Abstract

Water states in proton exchange membranes have previously been extracted using terahertz time-domain spectroscopy (THz-TDS) for thick Nafion membranes. In this work, we have developed a parametric based algorithm for data analysis and applied it to thin industrially relevant membranes (13-70μm), processed under different conditions, producing results consistent with conventional gravimetric analysis and prior demonstrations. This therefore opens up opportunities for rapid membrane investigations and understanding.