Water transport and mechanical response of block copolymer ion-exchange membranes for water purification

Shawn H. Chen, Carl Willis, Kenneth R. Shull*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A membrane inflation experiment was used to measure the mechanical response of ABCBA pentablock copolymer membranes designed to transport water through the coalescence of water-swollen polyelectrolyte domains within the polymer. Creep resistance of the block copolymers originates from glassy A blocks of either poly(p-methyl styrene) or poly(t-butyl styrene), and water permeability is attributed to the polystyrene C block that is partially sulfonated. The creep resistance of the membranes in the wet state was enhanced by replacing the poly(t-butyl styrene) A blocks with poly(p-methylstyrene), or by decreasing the molecular weight of the polyelectrolyte C block. Both of these substitutions increased the creep resistance of the membranes in a wet state while retaining a high degree of water permeability.

Original languageEnglish (US)
Pages (from-to)388-396
Number of pages9
JournalJournal of Membrane Science
Volume544
DOIs
StatePublished - 2017

ASJC Scopus subject areas

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

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