The title organic -inorganic composite paint was prepared by blending epoxy resin and silica sol, which was modified with amino group by sol -gel process. Paints with different ratio of modified silica sol were analyzed by FT - IR, contact angel, TGA and so on. It was found that the properties of coating,such as adhesion, hardness, impact resistance, flexibility were the best when the content of modified silica sol was 2％ ～5％. In addition, the properties of acid resistance, alkali resistance, gasoline resistance, distilled water resistance, and salt water resistance of the coatings reached the requirement for actual use. FTIR analysis indicated that hydrogen bonds existed between the matrix and silica phase. Chemical bonds and hydrogen bonds existed between the epoxy matrix and silica phase, along with the effect of crosslinking between organic and inorganic phases, could enhance the properties of heat stability and corrosion resistance.%通过溶胶-凝胶法制备氨基改性硅溶胶,并将其掺混改性E-44环氧树脂以得到硅溶胶改性环氧复合涂料.利用红外光谱(FT-IR)、接触角、热重(TGA)等对所得涂层进行分析测试.结果表明:当加人的改性SiO2硅溶胶占环氧树脂含量为2%-5%时,涂层的附着力、硬度、耐冲击性、柔韧性等较好,同时涂层的耐酸、耐碱、耐汽油、耐蒸馏水、耐盐水效果也达到实际使用标准.杂化涂层中SiO2与环氧树脂两相间存在化学键及氢键作用,有机-无机杂化交联的结果,可提高涂层的耐高温及防腐蚀性能.
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