Pervaporation of aqueous organic mixture through in situ complex membranes based on polycrylonitrile

  • Lee, Young-Moo (Department of Industrial Chemistry, College of Engineering Hanyang University) ;
  • Oh, Boo-Keun (Department of Industrial Chemistry, College of Engineering Hanyang University)
  • Published : 1995.09.01

Abstract

Modified polycrylonitrile(PAN) membranes were prepared by emulsion or emulsifier-free emulsion polymerization technique. Separation capacity was determined at several operating temperatures(25, 40, 55 and 70 $^{\circ}$C) to dehydrate 56wt% pyridine aqueous solution through modified PAN membranes having different functional groups. All these PAN-based membranes were selective toward water to different degrees depending on the nature of functional groups present in the membranes. Pervaporation characteristics of PAN-based membranes are so different and classified into three categories depending on the type of the functional groups in PAN copolymers. Among PAN-based membranes, the in-situ complex membranes show the best separation capacity over the operating temperatures.

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