| Autor: |
Masato Nakade, Kosuke Ichihashi, Makoto Ogawa |
| Zdroj: |
Journal of Sol-Gel Science & Technology; Dec2005, Vol. 36 Issue 3, p257-264, 8p |
| Abstrakt: |
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 400C 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 400C 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 400C and transformed to anatase after the heat treatment at 1,000C. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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