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Polymers 2017, 9(10), 489; https://doi.org/10.3390/polym9100489

Micron-Sized Pored Membranes Based on Polyvinylidene Difluoride Hexafluoropropylene Prepared by Phase Inversion Techniques

1
Werkstoffkunde (IAM-WK), Institut für Angewandte Materialien, Karlsruher Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
2
Keramische Werkstoffe und Technologien (IAM-KWT), Institut für Angewandte Materialien, Karlsruher Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
3
Institut für Mikrosystemtechnik, Universität Freiburg, Georges-Köhler-Allee 102, 79110 Freiburg, Germany
*
Author to whom correspondence should be addressed.
Received: 21 August 2017 / Revised: 15 September 2017 / Accepted: 27 September 2017 / Published: 6 October 2017
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Abstract

In this study, micron-sized pored membranes, based on the co-polymer polyvinylidene difluoride hexafluoropropylene (PVdF-HFP) were prepared via phase inversion techniques. The aim of the approach was to find less harmful and less toxic solvents to fabricate such films. Therefore, the Hansen solubility approach was used to identify safer and less toxic organic solvents for the phase inversion process, relative to present solvent mixtures, based on acetone, dimethyl formamide, dimethyl acetamide or methanol. With this approach, it was possible to identify cyclopentanone, ethylene glycol and benzyl alcohol as suitable solvents for the membrane preparation process. Physicochemical and mechanical properties were analyzed and compared, which revealed a uniform membrane structure through the cross section. Differences were observed at the top surface, in dependence of both preparation approaches, which are described in detail. View Full-Text
Keywords: PVdF-HFP; micron-sized pored membrane; phase inversion; gel polymer electrolyte PVdF-HFP; micron-sized pored membrane; phase inversion; gel polymer electrolyte
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Hofmann, A.; Thißen, E.; Migeot, M.; Bohn, N.; Dietrich, S.; Hanemann, T. Micron-Sized Pored Membranes Based on Polyvinylidene Difluoride Hexafluoropropylene Prepared by Phase Inversion Techniques. Polymers 2017, 9, 489.

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