摘要
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.
Silicone/SiO_2 organic-inorganic hybrid sols with different content of SiO_2 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.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2010年第5期418-422,共5页
Corrosion Science and Protection Technology
基金
航空科学基金项目资助(2007ZE56009)
