Spatial localization of membrane degradation by in situ wetting and drying of membranes in the scanning electron microscope

Manfred Nachtnebel*, Harald Matthias Fitzek, Claudia Mayrhofer, Boril Stefanov Chernev, Peter Pölt

*Korrespondierende/r Autor/in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikel

Abstract

Flat sheet microfiltration membranes are often based on PES/PVP (polyethersulfone/polyvinylpyrrolidone), because of their wide range of applications and their excellent resistance to many physical and chemical treatments. Nevertheless, regular cleaning of the membranes is necessary, which often leads to membrane degradation and thus a gradual reduction in performance. This study investigates the impact of three typical cleaning agents (NaClO, NaOH and CA) on multilayered PES/PVP membranes used for water filtration by in situ wetting and drying experiments in an environmental scanning electron microscope (ESEM). It has been proven that this method enables the detection of membrane degradation and is able to identify the layer which is most affected by these chemical treatments. The results were verified by Fourier transform infrared spectroscopy (FT-IR) and a method based on the imbibition of water droplets at the membrane surface. But the ESEM based method is the only method that involves a large sample volume and can thus provide statistically significant results.
Originalspracheenglisch
Seiten (von - bis)81-89
FachzeitschriftJournal of Membrane Science
Jahrgang503
DOIs
PublikationsstatusVeröffentlicht - 2016

Fields of Expertise

  • Advanced Materials Science

Treatment code (Nähere Zuordnung)

  • Basic - Fundamental (Grundlagenforschung)

Fingerprint Untersuchen Sie die Forschungsthemen von „Spatial localization of membrane degradation by in situ wetting and drying of membranes in the scanning electron microscope“. Zusammen bilden sie einen einzigartigen Fingerprint.

Dieses zitieren