A rationale for the preparation of asymmetric pervaporation membranes

M.H.V. Mulder, J. Oude Hendrikman, J.G. Wijmans, C.A. Smolders

Research output: Contribution to journalArticleAcademic

72 Citations (Scopus)
182 Downloads (Pure)


Pervaporation is carried out primarily with homogeneous membranes. An improvement in permeation rate can be achieved by using asymmetric or composite membranes. In order to maintain a high selectivity, very dense top layers are needed. The formation of asymmetric pervaporation membranes will be discussed in terms of the model proposed by our group: formation of the top layer by gelation; formation of the porous sublayer by liquid-liquid phase separation followed by gelation of the concentrated polymer phase. To obtain very dense top layers the following factors are important: the ratio of nonsolvent inflow and solvent outflow, polymer concentration, location of the liquid-liquid demixing gap, and location of the gel region. Asymmetric membranes have been prepared by varying these factors, and the obtained membranes have been tested on ethanol/water mixtures.
Original languageEnglish
Pages (from-to)2805-2820
JournalJournal of applied polymer science
Issue number7
Publication statusPublished - 1985


  • IR-70794


Dive into the research topics of 'A rationale for the preparation of asymmetric pervaporation membranes'. Together they form a unique fingerprint.

Cite this