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中文摘要：
以聚合氯化铝（PAC）、氧氯化锆和己二酸等为原料合成了带有羧基功能基的铝锆偶联剂．借助傅里叶红外光谱、热重分析、X射线衍射、扫描电镜和粒度分布等测试方法对铝锆偶联剂及改性前后的纳米TiO2进行表征．对铝锆偶联剂袁征的结果表明：已二酸分子中的一个羧基同时与铝和锆原子中心相连，另一羧基则作为偶联剂的功能基得以保留；铝锆偶联剂分子中无机部分所占比例高达71％．对利用铝锆偶联剂进行表面改性得到的纳米TiO2表征发现：铝锆偶联剂在纳米TiO2表面形成化学吸附，但此吸附并未对纳米TiO2的晶型产生影响；改性后的纳米TiO2在水中的分散性显著提高．
英文摘要：
Zircoaluminate coupling agent with carboxy groups was synthesized, with polyaluminium chloride, zirconium oxychloride and adipic acid, etc. , as the materials. The product and the nano-sized TiO2 before and after the surface modification were then characterized by means of FT-IR, TG-DTG, XRD, TEM and by measuring the size distribution. It is found that one carboxy group in adipic acid forms a complex bridge between the aluminum and the zirconium centers, while the other remains unchanged as the functional group of the coupling agent; and that the proportion of inorganic parts in the coupling agent is up to 71%. Moreover, as for the nano-sized ZiO2 surface-modified with the coupling agent, there exists a chemical adsorption of the coupling agent on TiO2 surface, which has no effect on the crystalline form of nano-sized TiO2, and, the dispersion of the modified nano-sized TiO2 in water improves remarkably.
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