Preparation of titania/PDMS hybrid films and the conversion to porous materials

Masato Nakade, Kosuke Ichihashi, Makoto Ogawa

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Transparent films of titania/poly(dimethylsiloxane) (PDMS) hybrids were prepared by the solvent evaporation from the precursor solution prepared by the co-hydrolysis and co-condensation of titanium tetraisopropoxide and a methoxy-functionalized PDMS. The hybrid films were flexible and had high homogeneity of the composition. The organic groups of PDMS were decomposed at 400°C in air to form porous films. Though the heated films were rather brittle compared to the as-synthesized films, they were still transparent and homogeneous. The BET surface areas of the films after the heat treatment at 400°C were over 300 m2/g, while the as-synthesized hybrid films were non porous. According to the BDDT classification, the nitrogen adsorption/desorption isotherms of the calcined films were Type I, showing that the films were microporous. The titania domains were still amorphous after the heat treatment at 400°C and transformed to anatase after the heat treatment at 1,000°C.

Original languageEnglish
Pages (from-to)257-264
Number of pages8
JournalJournal of Sol-Gel Science and Technology
Volume36
Issue number3
DOIs
Publication statusPublished - 2005 Dec

Keywords

  • Hybrid
  • Microporous
  • Silicone
  • Thermal decomposition
  • Titania

ASJC Scopus subject areas

  • Ceramics and Composites

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