Formation of alkali resistant PDMS–TiO2–SiO2 hybrid coatings

Abstract PDMS–TiO 2 –SiO 2 hybrid coatings have been prepared on glass substrates via sol–gel method. The structural evolution of the coatings containing different PDMS amounts was examined by TG–DTA and FTIR. It was found that the hybrid character of coatings can be reserved after heating at 200 °C. The alkali resistance of hybrid coatings in 1 N NaOH solution at 50 °C was investigated by X-ray fluorescence analysis, weight loss and scanning electron microscopy. The results showed that the coating could resist effectively the alkali attack for 24 h. Such alkali resistance depended on the added amount of PDMS and the coating with 20 wt.% PDMS showed a better alkali resistance.

[1]  E. Mäder,et al.  Coatings for glass fibers in a cementitious matrix , 2004 .

[2]  G. H. Frischat,et al.  Sol-gel coatings of BaO-TiO2-SiO2 compositions , 1994 .

[3]  N. Miyata,et al.  Bioactivity and Mechanical Properties of Poly(dimethylsiloxane)‐Modified Calcia–Silica Hybrids with Added Titania , 2003 .

[4]  G. H. Frischat,et al.  Thin SiO2TiO2ZrO2 films from alkoxide solutions , 1988 .

[5]  G. H. Frischat,et al.  Development of a New Alkali Resistant Coating , 2003 .

[6]  Preparation and characterization of photocatalytical TiO2–SiO2–PDMS layers on glass , 2006 .

[7]  C. Toh,et al.  Recent advances in analytical chemistry--a material approach. , 2006, Analytica chimica acta.

[8]  Y. Liu,et al.  Preparation and characteristics of high pH-resistant sol-gel alumina-based hybrid organic-inorganic coating for solid-phase microextraction of polar compounds. , 2006, Journal of chromatography. A.

[9]  N. Miyata,et al.  Bioactivity and mechanical properties of PDMS-modified CaO-SiO(2)-TiO(2) hybrids prepared by sol-gel process. , 2000, Journal of biomedical materials research.

[10]  L. Wen,et al.  Chemical Interactions Between Cement and E‐Glass Fibers with a CaO–BaO–SiO2–TiO2 Coating , 2005 .

[11]  V. Castaño,et al.  Organic–inorganic hybrid coating (poly(methyl methacrylate)/monodisperse silica) , 2005 .

[12]  K. Alhooshani,et al.  Sol-gel approach to in situ creation of high pH-resistant surface-bonded organic-inorganic hybrid zirconia coating for capillary microextraction (in-tube SPME). , 2005, Journal of chromatography. A.

[13]  E. Passalacqua,et al.  Alkali resistance of tape-cast SiC porous ceramic membranes , 1998 .

[14]  E. Morales,et al.  Synthesis of inorganic-organic hybrid materials from TEOS, TBT and PDMS , 2003 .