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

Jie Cheng Tsai, Chien-Kung Lin

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

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
Volume42
Issue number2
DOIs
Publication statusPublished - 2011 Mar 1

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Methanol
Membranes
Acids
Polymers
Polyether ether ketones
Proton conductivity
Direct methanol fuel cells (DMFC)
Composite membranes
Open circuit voltage
Crosslinking
Protons
Ion exchange
perfluorosulfonic acid
Water

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

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abstract = "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{\circledR} to create composite membranes. The acid-base blend membranes containing ionic crosslinking exhibited lower water uptake than recast Nafion{\circledR}, 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{\circledR} 115 and recast Nafion{\circledR}. The acid-base blend membranes satisfy the requirements for proton exchange membranes in the context of direct methanol fuel cell (DMFC) applications.",
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Acid-base blend membranes based on Nafion®/aminated SPEEK for reducing methanol permeability. / Tsai, Jie Cheng; Lin, Chien-Kung.

In: Journal of the Taiwan Institute of Chemical Engineers, Vol. 42, No. 2, 01.03.2011, p. 281-285.

Research output: Contribution to journalArticle

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