Preparation of Titania/PDMS Hybrid Films and the Conversion to Porous Materials |
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Authors: | Masato?Nakade Kosuke?Ichihashi Email author" target="_blank">Makoto?OgawaEmail author |
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Institution: | (1) Research and Development Division, KOSé Corporation, Azusawa 1-18-4, Itabashi-ku, Tokyo 174-0051, Japan;(2) School of Science and Engineering, Waseda University, Nishi-waseda 1-6-1, Shinjuku-ku, Tokyo 169-8050, Japan;(3) School of Science and Engineering, Waseda University, Nishi-waseda 1-6-1, Shinjuku-ku, Tokyo 169-8050, Japan |
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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. |
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Keywords: | titania silicone hybrid thermal decomposition microporous |
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