Towards an Empirical Model for the Prediction of the Selectivity of Polymer Membranes†
1
ams Sensors Germany GmbH, 72770 Reutlingen, Germany
2
Fraunhofer Institute for Physical Measurement Techniques IPM, 79110 Freiburg, Germany
3
Department of Microsystems Engineering—IMTEK, University of Freiburg, 79110 Freiburg, Germany
*
Author to whom correspondence should be addressed.
†
Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018.
Proceedings 2018, 2(13), 979; https://doi.org/10.3390/proceedings2130979
Published: 30 November 2018
(This article belongs to the Proceedings of EUROSENSORS 2018)
Polymer membranes are often used in combination with gas sensors for selectivity enhancement, especially with metal-oxide sensors (MOX). We report on the development of an empirical model to predict the gas separation properties of polymer membranes. This model is based on the two parameters sorption and diffusion, represented by the polar fraction of the free surface energy (SFE), and the water absorption combined with the molecule diameter based on Lennard-Jones. We measured the surface tension for a number of common fluoropolymers and used the results to determine their SFE using the graphical method developed by van Oss—Chaudhury—Good, compared them with literature data and further optimized the model. With the optimized model, combined with the information on functional groups in the polymers, we are able to predict the selectivity of polymer membranes.
Keywords:
polymer membrane; selectivity; gas sensor; separation; model
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MDPI and ACS Style
Graunke, T.; Schmitt, K.; Busch, S.; Raible, S.; Wöllenstein, J. Towards an Empirical Model for the Prediction of the Selectivity of Polymer Membranes. Proceedings 2018, 2, 979. https://doi.org/10.3390/proceedings2130979
AMA Style
Graunke T, Schmitt K, Busch S, Raible S, Wöllenstein J. Towards an Empirical Model for the Prediction of the Selectivity of Polymer Membranes. Proceedings. 2018; 2(13):979. https://doi.org/10.3390/proceedings2130979
Chicago/Turabian StyleGraunke, Thorsten; Schmitt, Katrin; Busch, Sebastian; Raible, Stefan; Wöllenstein, Jürgen. 2018. "Towards an Empirical Model for the Prediction of the Selectivity of Polymer Membranes" Proceedings 2, no. 13: 979. https://doi.org/10.3390/proceedings2130979
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