Hybrids of perfluorosulfonic acid ionomer and silicon oxide by sol-gel reaction from solution: Morphology and thermal analysis

R. A. Zoppi, I. V.P. Yoshida, Suzana Nunes*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

79 Scopus citations

Abstract

NAFION®/silicon oxide hybrids were prepared from solution by hydrolysis/polycondensation of alkoxy silanes. Transparent, but brittle films were obtained when TEOS was used as the inorganic polymer precursor, showing a lamellar structure by transmission electron microscopy. Part of the TEOS was substituted by TMDES to increase the film flexibility. For substitution higher than 10% phase separation was clearly observed by scanning and transmission electron microscopy. The thermal analysis of NATION® and hybrids with different inorganic contents showed two main endothermic transitions, one assigned to the NAFION® ionic clusters and the other to the melting of the perfluorinated matrix. The cluster transition temperature decreases as the TEOS content increases up to 50 wt%, but than increases as the TEOS content reaches 80 wt%.

Original languageEnglish (US)
Pages (from-to)1309-1315
Number of pages7
JournalPolymer
Volume39
Issue number6-7
DOIs
StatePublished - Jan 1 1998

Keywords

  • NAFION®
  • Polymer hybrids
  • Sol-gel

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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