Proton exchange in hybrid sulfonated poly(ether ether ketone)-silica membranes by 1H solid-state NMR

Maria Baias, Dan E. Demco, Irene Colicchio, Bernhard Blümich, Martin Möller

Research output: Contribution to journalArticle

Abstract

Enthalpy of activation for proton exchange processes in fully hydrated hybrid sulfonated poly(ether ether ketone)-silica (SPEEK/SiO2) membranes were measured from the 1H NMR spectra under magic angle sample spinning (MAS). For the first time Eyring function is used for this purpose. Two exchange processes between different water pools were detected. The isotropic chemical shift of the 1H spectrum allows us to obtain information about the normalized enthalpy of activation characterizing the water exchange. These results show that the proton exchange membranes performances could be improved by addition of small concentrations of silica in the range of 5-10 wt.%.

Original languageEnglish (US)
Pages (from-to)227-230
Number of pages4
JournalChemical Physics Letters
Volume456
Issue number4-6
DOIs
StatePublished - May 5 2008

Fingerprint

Polyether ether ketones
ketones
Silicon Dioxide
Protons
Enthalpy
ethers
Ion exchange
enthalpy
Chemical activation
Nuclear magnetic resonance
activation
silicon dioxide
membranes
solid state
Membranes
nuclear magnetic resonance
protons
Water
Chemical shift
metal spinning

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces
  • Condensed Matter Physics

Cite this

Proton exchange in hybrid sulfonated poly(ether ether ketone)-silica membranes by 1H solid-state NMR. / Baias, Maria; Demco, Dan E.; Colicchio, Irene; Blümich, Bernhard; Möller, Martin.

In: Chemical Physics Letters, Vol. 456, No. 4-6, 05.05.2008, p. 227-230.

Research output: Contribution to journalArticle

Baias, Maria ; Demco, Dan E. ; Colicchio, Irene ; Blümich, Bernhard ; Möller, Martin. / Proton exchange in hybrid sulfonated poly(ether ether ketone)-silica membranes by 1H solid-state NMR. In: Chemical Physics Letters. 2008 ; Vol. 456, No. 4-6. pp. 227-230.
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