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SiO2含量有机硅/SiO2有机-无机杂化溶胶. 经100℃烘干12 h得到有机硅/SiO2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/SiO2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.
Silicone/SiO2 organic-inorganic hybrid sols with different content of SiO2 have been prepared by means of sol-gel method and through hydrolysis-polycondensation reaction from reagents: tetraethyl orthosilicate (TEOS) as inorganic precursor, methyl triethoxysilane (MTES) and diphenyl dimethoxy silane (DDS) as organic precursor and hydrochloric acid and water as catalysts. The hybrid coatings were obtained by dried sol-gel at 100℃ for 12 hours. Infrared spectrum (FT-IR) showed that two phases of organic and inorganic ones formed a strong interaction in all hybrid materials although they were prepared with different content of TEOS. Heat-resistance of the hybrid coatings was investigated by Thermo Gravimetric Analysis (TGA) and heat-resistance test. Their corrosion-resistance was studied by electrochemical impedance spectroscopy (EIS), immersion test and salt spray test. The results show that the thermal decomposition temperature (for the hybrid coatings) were increased by 67℃ and its corrosion resistance was improved obviously for with addition of a certain amount of TEOS.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%