FTIR-ATR to the study of diffusion of water on polysulfone polymeric membranes

Marcia R. Pereira; Jack Yarwood

doi:10.1117/12.166669

31 January 1994 Fourier transform infrared attenuated total reflection approach to the study of diffusion of water on polysulfone polymeric membranes

Marcia R. Pereira, Jack Yarwood

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Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166669
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

Abstract

Most of the techniques used to study diffusion coefficients require sophisticated and often indirect methods for the detection of the analyte diffusing through the membrane that, generally, do not allow us to monitor the diffusion process continuously. In this work we are trying to establish an experimentally simple and straightforward method employing FTIR-ATR spectroscopy to measure liquid sorption kinetics in situ. The transparency of the membrane in study, allied with its ability to absorb substantial amounts of penetrant liquids without dissolving, means that it is possible to observe and measure the sorption process optically. The method is based on monitoring the time-dependent change in absorption due to diffusion of water into the membrane.

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Marcia R. Pereira and Jack Yarwood "Fourier transform infrared attenuated total reflection approach to the study of diffusion of water on polysulfone polymeric membranes", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166669

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