Structure-property relationships of crosslinked disulfonated poly(arylene ether sulfone) membranes for desalination of water

Amin Daryaei, Eui-Soung Jang, Shreya Roy Choudhury, Dana Kazerooni, John J. Lesko, Benny D. Freeman, Judy S. Riffle, James E. McGrath

Research output: Contribution to journalArticleResearchpeer-review

6 Citations (Scopus)

Abstract

Controlled molecular weight poly(arylene ether sulfone) oligomers with aromatic amine end groups and systematically varied degrees of disulfonation were synthesized by direct polymerization of disulfonated and non-sulfonated 4,4′-dichlorodiphenylsulfone. The oligomers were crosslinked with a tetrafunctional epoxy curing agent in the membrane casting process. Water uptake and IEC were investigated to understand how the structure and ion content affected the fixed charge concentrations (moles of ions/L of sorbed water). The hydrated mechanical properties of these copolymer networks were also studied in light of their ion contents and water uptake. At similar IECs, membranes with shorter ∼5000 Da oligomers absorbed less water than those with ∼10,000 Da blocks. The salt permeabilities correlated with water uptake and fixed charge density. Among the crosslinked membranes, the one with the 10,000 Da oligomer and with 50% disulfonation (mB5-10) had an excellent combination of water uptake, hydrated mechanical properties, fixed charge density, and low salt permeability.

Original languageEnglish
Pages (from-to)286-293
Number of pages8
JournalPolymer
Volume132
DOIs
Publication statusPublished - 6 Dec 2017
Externally publishedYes

Keywords

  • Cation exchange membrane
  • Crosslinked polysulfone
  • Desalination
  • Hydrated mechanical properties
  • Salt permeability

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