Nanostructure of PDMS-TEOS-PrZr hybrids prepared by direct deposition of gamma radiation energy

Joana J.H. Lancastre, António N. Falcão, Fernanda M.A. Margaça, Luís M. Ferreira, Isabel M. Miranda Salvado, László Almásy, Maria H. Casimiro, Anikó Meiszterics

Research output: Contribution to journalArticle

Abstract

Organic-inorganic materials have been the object of intense research due to their wide range of properties and therefore innumerous applications. We prepared organic-inorganic hybrid materials by direct energy deposition on a mixture of polydimethylsiloxane silanol terminated (33 wt% fixed content), tetraethylorthosilicate and a minor content of zirconium propoxide that varied from 1 to 5 wt% using gamma radiation from a Co-60 source. The samples, dried in air at room temperature, are bulk, flexible and transparent. Their nanostructure was investigated by small angle neutron scattering. It was found that the inorganic oxide network has fractal structure, which becomes denser as the zirconium propoxide content decreases. The results suggest that oxide nanosized regions grow from the OH terminal group of PDMS which are the condensation seeds. Their number and position remains unaltered with the variation of zirconium propoxide content that only affects their microstructure. A model is proposed for the nanostructure of the oxide network that develops in the irradiation processed hybrid materials.

Original languageEnglish
Pages (from-to)91-94
Number of pages4
JournalApplied Surface Science
Volume352
DOIs
Publication statusPublished - Oct 15 2015

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Keywords

  • Gamma irradiation
  • Hybrid materials
  • Microstructure
  • Neutron scattering
  • PrZr effect

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

Lancastre, J. J. H., Falcão, A. N., Margaça, F. M. A., Ferreira, L. M., Miranda Salvado, I. M., Almásy, L., Casimiro, M. H., & Meiszterics, A. (2015). Nanostructure of PDMS-TEOS-PrZr hybrids prepared by direct deposition of gamma radiation energy. Applied Surface Science, 352, 91-94. https://doi.org/10.1016/j.apsusc.2015.01.224