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Development of thermopervaporation membranes for treatment of oil-in-water emulsions

  • Long-term stability of membranes in membrane distillation operation is a problem nowadays which prevents the industrial breakthrough of this separation process. Fouling or slow pore wetting are the basic reasons for this. Membrane distillation membranes were made by NIPS process rendering the membrane asymmetrically to achieve low permeation resistance and pores which can be over coated with polyelectrolyte polymers thus leading to thermopervaporation membranes. Those membranes prohibit pore wetting and may strongly reduce resorption of organic substances on for membrane distillation typically used hydrophobic surfaces thus leading to longterm operation stability in dewatering including stable membrane cleaning. Asymmetric PVDF membranes have been coated with cation exchange polyelectrolyte leading to a very thin, defect-free layer which has a high permeation rate for water due to the domain structure of phase-separated hydrophilic and hydrophobic three-dimensional structures.

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Author of HS ReutlingenBell, Carl-Martin
Erschienen in:16th Aachener Membran Kolloquium : 2nd - 3rd November 2016, proceedings
Publisher:Druckerei & Verlagshaus Mainz
Place of publication:Aachen
Document Type:Conference proceeding
Publication year:2016
Tag:thermopervaporation; thin-film composite membrane; waste water of oil-in-water emulsions
Page Number:6
First Page:231
Last Page:236
PPN:Im Katalog der Hochschule Reutlingen ansehen
DDC classes:660 Technische Chemie
Open access?:Nein