聚钛硅氧烷底涂液是用N-[3-(三乙氧基硅烷)两基]-4,5二羟咪唑(TSPI)和钛烷氧化物在甲醇、水溶液中以酸和碱两步催化水解、缩聚而成.该底涂液涂复在铝基材上经热解、脱碳化物转化成准无机耐蚀涂膜.下述因素对涂膜的耐蚀性起了重要作用:(1)涂膜的厚度与热解温度;(2)膜与基材之间的界面结合;(3)介质对涂膜的润湿性.
Polytitanosiloxane (PTS) coating was prepared by hydrolysis-polymerizat ion synthesis from precursor sol-solutions consisting of N-[3(triethoxysilyl) propy]4,5 dihydroimidazole, Ti(OC2H5)4, methanol and water by means of twrvstep acid-base catalysis. These solutions were spreed over aluminium substrate, then the quasi-inorganic coatings of different thickness were formed by Pyrolysis-release of carbonaceous species. The following faCtors were considered as playing important roles for corrosion resistance of the coatings:1. film thickness and pyrolysis temperature:2. interface between film and substrate;3. wettability of the coatings.
参考文献
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