论文部分内容阅读
从水玻璃合成了纳米硅溶胶,并以它为起始原核,通过水解钛酸正丁酯沉积二氧化钛,制得了稳定的二氧化钛复合二氧化硅纳米悬浮液,研究了添加的高分子两亲分散剂聚醚多胺在硅胶粒上的吸附和二氧化钛沉积过程中的贡献.研究结果表明,添加的聚醚多胺吸附在硅胶粒表面,有利于硅溶胶的稳定;钛酸正丁酯-丁醇-硫酸水解反应是可逆的,二氧化钛向硅胶粒定向沉积,这些沉积物呈无定形态,在沉积过程中,吸附的这些添加剂发生离子化,其阳离子端基形成的离子氛有利于二氧化钛沉积,并能减少胶粒粘接或团聚.
Nanosilica sol was synthesized from water glass. With it as the starting proanthocyanidin, titanium dioxide was hydrolyzed by n-butyl titanate to prepare a stable titania-silica composite nanoparticle suspension. The effects of the addition of amphiphilic polymer Polyether polyamine adsorption on silica particles and the contribution of titanium dioxide deposition process.The results show that the polyether polyamine adsorbed on the surface of the silica gel particles is conducive to the stability of the silica sol; n-butyl titanate - butanol - Sulfuric acid hydrolysis reaction is reversible, titanium dioxide to the silica particles oriented deposition, these deposits were amorphous state, in the deposition process, the adsorption of these additives ionization, the cation end of the formation of ionic atmosphere is conducive to the deposition of titanium dioxide, and can Reduce glue sticking or agglomeration.