Poly(acrylic acid-co-4-vinylimidazole)/Sulfonated poly(ether ether ketone) blend membranes: A role of polymer chain with proton acceptor and donor for enhancing proton transfer in anhydrous system

Manita Jithunsa, Kohji Tashiro, Suzana Nunes, Suwabun Chirachanchai*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


The sulfonated polyether ether ketone (SPEEK) membranes containing poly(acrylic acid-co-4-vinylimidazole) (poly(AA-co-4VIm)) for low humidity operations in polymer electrolyte membrane fuel cells are focused. The blend membranes with homogeneous morphologies between SPEEK and copolymers are successful based on the hydrogen bond between SO 3 H or COOH groups and imidazole group observed by FTIR and SEM. The blend membranes also show an improvement in thermal stability as compared with SPEEK. IEC and proton conductivity of the blend membranes are increased with an increase of the acrylic acid content in poly(AA-co-4VIm). The dimensional stability of the blend membranes is significantly improved as evaluated by the swelling ratio. The present work shows how polymer chain with proton donor and acceptor functional groups plays an important role in enhancing proton conductivity together with other membrane properties.

Original languageEnglish (US)
Pages (from-to)10384-10391
Number of pages8
JournalInternational Journal of Hydrogen Energy
Issue number16
StatePublished - Aug 1 2011


  • 4-Vinylimidazole
  • Acrylic acid
  • Polymer electrolyte membrane
  • Proton conductivity
  • Sulfonated (polyether ether ketone)

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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