SPEEK-TiO2 nanocomposite hybrid proton conductive membranes via in situ mixed sol-gel process

M. Luisa Di Vona*, Zakarya Ahmed, Serafina Bellitto, Alessandro Lenci, Enrico Traversa, Silvia Licoccia

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

128 Scopus citations


Hybrid membranes based on highly sulfonated poly(ether ether ketone) (SPEEK, DS = 0.9) where titania network was dispersed by in situ sol-gel reactions were prepared and characterized. The syntheses were carried out using either a basic catalyst (pyridine) or a chelating agent (2,4-pentandione) to control the features of the inorganic network in the polymeric matrix. Membranes were characterized by thermogravimetric analysis (TG), field emission scanning electron microscopy (FE-SEM), and electrochemical impedance spectroscopy (EIS). The formation of the inorganic component did not introduce any porosity in the final material and both syntheses led to membranes with enhanced thermal stability, reduced water uptake and good proton conductivity (σ = 5.8 × 10-2 S cm-1) up to 120 °C, thus making the samples suitable for application as polymeric electrolytes at intermediate temperature.

Original languageEnglish (US)
Pages (from-to)156-161
Number of pages6
JournalJournal of Membrane Science
Issue number1-2
StatePublished - Jun 15 2007
Externally publishedYes


  • Nanocomposite hybrid polymer
  • Poly(ether ether ketone) (PEEK)
  • Proton exchange membrane
  • Sol-gel reactions
  • Titanium alkoxide

ASJC Scopus subject areas

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


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