Polymer blend membranes of sulfonated poly(arylene ether ketone) for direct methanol fuel cell

Jisu Choi, Dong Hwee Kim, Hyung Kyu Kim, Chongkyu Shin, Sung Chul Kim

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


The blend membranes of sulfonated poly(arylene ether ketone) (sPAEK) (IEC = 1.0 mequiv./g)/Nafion® and the blend membranes of sPAEK (IEC = 1.0 mequiv./g)/sPAEK (IEC = 1.7 mequiv./g) were prepared. sPAEK with low IEC was introduced to reduce the methanol permeability through the membrane. Morphology, water uptake, proton conductivity and methanol permeability of the blend membranes were investigated by SEM, AFM, AC impedance spectroscopy and permeability measuring instrument. The cross-sections of blend membranes showed phase-separated morphologies. The effect of phase-separated morphology on the properties of blend membranes was investigated. The properties like water uptake, proton conductivity, and methanol permeability of sPAEK/Nafion® blend membranes showed similar values with sPAEK and properties of sPAEK/sPAEK blend membranes showed intermediate values of two polymers due to the difference in morphology of the blend membranes. sPAEK/sPAEK blend membranes showed relatively high proton conductivity and lowered methanol permeability compared to Nafion®. sPAEK/sPAEK blend membranes could be a competent substitution for Nafion®.

Original languageEnglish
Pages (from-to)384-392
Number of pages9
JournalJournal of Membrane Science
Issue number1-2
Publication statusPublished - 2008 Mar 5


  • Blend membrane
  • DMFC
  • Nafion
  • Phase separation
  • Sulfonated poly(arylene ether ketone)

ASJC Scopus subject areas

  • Biochemistry
  • General Materials Science
  • Physical and Theoretical Chemistry
  • Filtration and Separation


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