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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Nakade, M., Ichihashi, K. & Ogawa, M. Preparation of Titania/PDMS Hybrid Films and the Conversion to Porous Materials. J Sol-Gel Sci Technol 36, 257–264 (2005). https://doi.org/10.1007/s10971-005-4510-3
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DOI: https://doi.org/10.1007/s10971-005-4510-3