Nanofiber network ion-exchange membranes

Jonghyun Choi, Kyung Min Lee, Ryszard Wycisk, Peter N. Pintauro, Patrick T. Mather

Research output: Contribution to journalArticlepeer-review

129 Scopus citations

Abstract

A three-dimensional interconnected electrospun polyelectrolyte nanofiber network ion-exchange membrane was created and the interfiber viods were filled with an inert/uncharged polymer. A mat of ionomeric nanofibers was electrospun from a solution of 25 wt% of sulfonated poly(arylene ether sulfone) (sPAES) in dimethylacetamide. The volume fraction of fibers and the average fiber diameter increases to 0.73 and 165 nm respectively, with no change in mat thickness. A fiber volume fraction of 1.0 denotes a homogeneous film of 2.5 mmol/g sulfonated sPAES and a volume fraction of 0.0 corresponds to an unchanged NOA63 film. A need for interfiber welding after fiber compactation is confirmed by comparing the in-plane proton conductivity of embedded mats with and without welding. The dependence of water uptake on effective membrane ion-exchange capacity (IEC) is similar to that for a series of homogeneous sPAES films of different IEC.

Original languageEnglish (US)
Pages (from-to)4569-4572
Number of pages4
JournalMacromolecules
Volume41
Issue number13
DOIs
StatePublished - Jul 8 2008

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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