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Title: Influence of polyanion type and cationic counter ion on the SRNF performance of polyelectrolyte membranes
Authors: Ahmadiannamini, Pejman ×
Li, Xianfeng
Goyens, Ward
Meesschaert, Boudewijn
Vanderlinden, Willem
De Feyter, Steven
Vankelecom, Ivo # ×
Issue Date: 1-Jun-2012
Publisher: Elsevier Scientific Pub. Co.
Series Title: Journal of Membrane Science vol:403 pages:216-226
Abstract: Alternating deposition of oppositely charged polyelectrolytes (PEs) can create stable solvent resistant nanofiltration (SRNF) membranes with very high flux and selectivity. Combinations of poly(diallyldimethylammonium chloride) (PDDA) as polycation and poly(sodium styrene sulfonate) (PSS) or poly(vinyl sulfate) (PVS) as polyanions are reported from which supported membranes consisting of 5, 10, 15 and 20 bilayers are prepared via the layer-by-layer (LBL) method. The morphology of membranes prepared with polyanions in the Na- and H-form was studied by SEM and AFM. Membranes were applied in the filtration of organic solvents. Substitution of the counterion in the polyanion solutions influenced the interaction between the ions and the PE and consequently changed the PE conformation and the properties of the PEC films. The membranes prepared from polyanions in the H-form showed higher permeabilities and higher retentions than the ones prepared from the Na-form. All membranes showed very good retentions up to 99% for charged solutes in the pressure driven filtration of isopropanol (IPA) solutions and also showed excellent potential in the challenging polar aprotic solvents, such as N,N-dimethylformamide (DMF).
URI: 
ISSN: 0376-7388
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
Microbial and Molecular Systems - miscellaneous
Molecular Imaging and Photonics
Technologiecluster Bioengineering Technologie
Bioengineering Technology TC, Technology Campus Ostend
× corresponding author
# (joint) last author

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