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采用溶胶-凝胶法,以正硅酸乙酯(TEOS)为无机相前驱体,甲基三乙氧基硅烷(MTES)和二苯基二甲氧基硅烷(DDS)为有机相前驱体,盐酸和水为催化剂,通过水解-缩聚反应制备了不同SiO_2含量有机硅/SiO_2有机-无机杂化溶胶.经100℃烘干12 h得到有机硅/SiO_2杂化涂层.红外光谱研究表明不同TEOS含量制备的杂化材料有机、无机两相组成了强相互作用的杂化体系.采用热重分析(TGA)和耐热性试验研究不同TEOS含量有机硅/SiO_2有机-无机杂化涂层的耐热性能;采用电化学阻抗(EIS)、浸泡试验和盐雾试验研究其耐蚀性能,结果表明与未加TEOS的有机硅涂层相比,加入适量TEOS使得杂化涂层的热分解温度提高67℃,并且其耐蚀性能也得到明显提高.
Sol-gel method was used to synthesize tetraethyl orthosilicate (TEOS) as an inorganic phase precursor, methyltriethoxysilane (MTES) and diphenyldimethoxysilane (DDS) as organic phase precursors, Hydrochloric acid and water were used as catalysts to prepare organosilicone / SiO 2 organic-inorganic hybrid sols with different SiO 2 content by hydrolysis-polycondensation reaction. After drying at 100 ℃ for 12 h, organosilicon / SiO 2 hybrid coatings were obtained. Infrared spectra showed that different TEOS (TGA) and heat resistance test of organic / inorganic hybrid coatings with different content of TEOS on organic / inorganic hybrid coatings The results of electrochemical corrosion (EIS), immersion test and salt spray test show that compared with the non-TEOS-coated silicone coating, the addition of the appropriate amount of TEOS increases the thermal decomposition temperature of the hybrid coating 67 ℃, and its corrosion resistance has also been significantly improved.