Water-alcohol separation by pervaporation through chemically modified poly(amidesulfonamide)s

Wing Hong CHAN*, Ching Fai Ng, Suei Yee Lam-Leung, Xumin He

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Five N-alkylated derivatives of a poly(amidesulfonamide) polymerized from N,N'-bis-4-aminophenylsulfonyl 1,3-diaminopropane and isophthaloyl chloride were synthesized. The new polymeric materials were used to prepare nonporous symmetric membranes. The membranes were characterized by IR spectroscopy, sorption measurements and wide-angle X-ray diffraction. During the pervaporation of 10% aqueous solutions of methanol, ethanol, propan-1-ol and propan-2-ol, membranes made from the parent and modified poly(amidesulfonamide)s were preferentially permeable to water and their separation factors were mainly dependent on the molecular weight of the permeant. By introducing an alkyl pending group to the backbone of the polymer, all modified membranes exhibited an enhancement in flux rate and a variation in separation factor in the pervaporation of aqueous alcohols. In the dehydration of ethanol, several modified membranes possessed separation characteristics that appeared to be superior to that of the parent membrane. Copyright (C) 1999 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)77-86
Number of pages10
JournalJournal of Membrane Science
Volume160
Issue number1
DOIs
Publication statusPublished - 15 Jul 1999

Scopus Subject Areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

User-Defined Keywords

  • Chemical modification
  • Pervaporation
  • Poly(amidesulfonamide)s
  • Water-alcohol separation

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