Polyethersulfone electrospun nanofibrous composite membrane for liquid filtration

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Helmholtz-Zentrum Geesthacht

Abstract

A polyethersulfone (PES) electrospun nanofiber mat was evaluated as a membrane for liquid filtration. To alleviate difficult handling of the nanofibrous web and also to provide mechanical strength a poly(ethylene terephthalate) (PET) non-woven was used as the sub-layer. The PES/PET electrospun nanofibrous membranes (ENMs) were characterized in terms of water flux and retention performance. The water flux measurements indicated that the membranes possess a high initial flux. Upon increase of the feed pressure the porosity of the ENFs is deformed resulting in drastically decreased fluxes. To enhance the interfacial stability a heat treatment was performed. Heat treatment approach in addition to enhancement of interfacial stability could preserve the structure of the nanofibrous layer and its effective porosity. Retention tests with polystyrene suspension demonstrated that the filtration performance of the ENMs is highly dependent on size distribution of the suspended particles. When the particles over 1 mu m in size (microparticles) are present in the feed, the major rejection of the particles is performed within the first hour of the measurement. The flux is very high and pressure difference very low and almost negligible. In the case of a feed containing only nanoparticles (

Details

Original languageEnglish
Pages (from-to)68-77
Number of pages10
JournalJournal of Membrane Science
Volume365
Issue number1-2
Publication statusPublished - 1 Dec 2010
MoE publication typeA1 Journal article-refereed

    Research areas

  • Electrospinning, Nanofibers, Liquid filtration, Polyethersulfone, Pre-filter, ULTRAFILTRATION MEMBRANES, PREFILTERS, COPOLYMER, WATER

ID: 13595081