Authors
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Lenk, W. ; Meier-Haack, J.
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Title
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Polyelectrolyte multilayer membranes for pervaporation separation of aqueous-organic mixtures
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Date
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20.08.2002
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Number
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10810
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Abstract
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Composite membranes for pervaporation of water/alcohol mixtures were prepared by consecutive alternating adsorption of poly(acrylic acid) (polyanion) and poly(ethylenimine) (polycation) on a polyamide-6 substrate. The influence of preparation conditions on the pervaporation separation properties of polyelectrolyte multilayer composite membranes was studied. Variation of polyelectrolyte concentration of the dipping solution and adsorption time had only a minor effect on the membrane performance. On the other hand, high molecular weight polyelectrolytes had a high impact on membrane performance. A separation factor a of 2500 was observed for a membrane having four double layers. Best results were obtained when the adsorption temperature was raised from 25°C to 80°C A membrane with two double layers showed a separation factor a of 900.
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Publisher
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Desalination
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Wikidata
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Citation
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Desalination 148 (2002) 11-16
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DOI
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https://doi.org/10.1016/S0011-9164(02)00645-8
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Tags
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