Preparation and testing of polyvinyl alcohol composite membranes for reverse osmosis

Authors

  • K. Lang,

    1. Industrial Membrane Research Institute, Department of Chemical Engineering, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
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  • T. Matsuura,

    Corresponding author
    1. Industrial Membrane Research Institute, Department of Chemical Engineering, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
    • Industrial Membrane Research Institute, Department of Chemical Engineering, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
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  • G. Chowdhury,

    1. Industrial Membrane Research Institute, Department of Chemical Engineering, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
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  • S. Sourirajan

    1. Industrial Membrane Research Institute, Department of Chemical Engineering, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
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Abstract

Thin film composite membranes were prepared by coating porous polysulfone membranes with a polyvinyl alcohol layer and further cross-linking its surface. The thin layer of cross-linked polyvinyl alcohol served as a selective membrane. The membranes were prepared under various conditions and tested for sodium chloride separation. A high sodium chloride separation was achieved but the permeation rate was low compared with commercially available thin film composite membranes. Resistance against the flow of solvent water and sodium chloride solute were determined for individual component barrier layers.

Abstract

On a préparé des membranes composites à film mince en recouvrant des membranes de polysulfone poreuses d'une couche d'alcool ployvinylique ayant subi une reticulation de surface. La couche fine d'alcool polyvinylique ainsi préparée sert de membrane sélective. Les membranes ont été préparées dans des conditions variées et testées pour la séparation du chlore de sodium. On a obtenu une séparation élevée du chlore de sodium mais la vitesse de permeation est faible si on fait des comparaisons avec les membranes de composites à film mince disponibles sur le marché. Les résistances à l'écoulement d'eau (solvant) et du chlorure de sodium (soluté) ont été déterminées pour des couches barrières de composants individuels.

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