Acid-base blend membranes based on Nafion®/aminated SPEEK for reducing methanol permeability

Jie Cheng Tsai, Chien Kung Lin

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Sulfonated poly(ether ether ketone)s (SPEEKs) were further substituted on the polymer main chain by amino groups to form an acid-basic polymer, and blended with acid polymeric Nafion® to create composite membranes. The acid-base blend membranes containing ionic crosslinking exhibited lower water uptake than recast Nafion®, and the methanol permeability was reduced significantly for various contents of aminated SPEEK, with a maximum proton conductivity of ~0.063Scm-1 at 30°C. The single-cell performance of the blend membranes with various contents of aminated SPEEK showed 20-26mWcm-2 for S45A47 at 80°C. Both the power density and open circuit voltage were higher than those of Nafion® 115 and recast Nafion®. The acid-base blend membranes satisfy the requirements for proton exchange membranes in the context of direct methanol fuel cell (DMFC) applications.

Original languageEnglish
Pages (from-to)281-285
Number of pages5
JournalJournal of the Taiwan Institute of Chemical Engineers
Issue number2
Publication statusPublished - 2011 Mar

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)


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