溶胶-凝胶法制备青铜表面有机改性硅酸盐复合涂层  

PREPARATION OF ORGANICALLY MODIFIED SILICATE HYBRID COATINGS ON BRONZE SUBSTRATES BY SOL-GEL METHOD

作　　者：吴杰[1] 陈善华[1] 余萍[1] 王方 陈显丹 宋艳[3] 

机构地区：[1]成都理工大学材料与化学化工学院,成都610059 [2]成都市文物考古研究所,成都610072 [3]四川文物考古研究所,成都610041

出　　处：《硅酸盐学报》2006年第6期689-694,共6页Journal of The Chinese Ceramic Society

基　　金："十五"国家科技攻关计划重点(2004BA810802)资助项目

摘　　要：以异丙醇为溶剂,γ-缩水甘油醚基丙基三甲氧基硅(γ-glycidoxypropyltrimethoxysilane,GPTS)和甲氧基三甲氧基硅烷(methyltrimethoxysilane,MTNS) 为原料,用溶胶-凝胶法在青铜基体上制备了有机改性硅酸盐复合保护涂层。通过调节反应温度、溶液pH值、水引入量以及GPTS与MTMS摩尔比等,详细研究了各参数对溶胶-凝胶转变的影响,并研究了成膜热处理对涂层性能的影响。利用红外光谱、扫描电镜对有机改性硅酸盐涂层材料的结构和性能进行了分析。结果表明:水解温度为80℃时,当溶液初始pH值为4,GPTS与MTMS的摩尔比为1:2,引入水量满足(GPTS+MTMS)与H2O 的摩尔比为1:3时,制备的溶胶体系最优;溶胶的烘干温度宜在80-100℃范围内选取。For the purpose of protection of archaeological bronzes, γ-glycidoxypropyltrimethoxysilane （GPTS）/methyltrimethoxysilane （MTMS） hybrid coatings were prepared by a sol-gel method and using isopropanol as the solvent. The effect of the hydrolysis temperature, initial pH value, water content, GPTS and MTMS on the sol-gel transformation of the GPTS/MTMS system were investigated. The structure and morphologies of the GPTS/MTMS system were analyzed by Fourier transform infrared spectroscopy and scanning electron microscopy. The performance of both the synthesized and subsequent heat-treated coatings, such as their adherence to the bronze substrates and corrosion resistance to a solution of H2SO4, NaOH and NaC1, were determined. The results show that the optimal sol system can be prepared at 80℃, if the initial pH value, the molar ratio of n （GPTS＋MTMS）^＋n H2O are controlled at 4 and 1：3 （nGPTS：^nMTMS = 1：2）, respectively, and after subsequent heat treatment at 80-100℃, the GPTS/MTMS hybrid coatings can provide proper protection of bronze substrates.

关 键 词：缩水甘油醚基丙基三甲氧基硅 甲氧基三甲氧基硅烷 溶胶-凝胶法 保护涂层 

分 类 号：TQ264.17[化学工程—有机化工]