工艺参数对TiO2溶胶黏度及胶凝时间的影响  

Effects of process parameters on viscosity and gel time of TiO_2

作　　者：周锋[1] 傅迎庆[1] 梁开明[2] 

机构地区：[1]大连海事大学材料科学与工程系,辽宁大连116026 [2]清华大学材料科学与工程系,北京100084

出　　处：《大连海事大学学报》2008年第4期87-90,共4页Journal of Dalian Maritime University

基　　金：国家自然科学基金资助项目(50575028);大连海事大学青年教师科研基金资助项目(DLMU-ZL-200715)

摘　　要：为获得稳定的TiO2溶胶,以钛酸四丁酯为先驱体,系统研究TiO2胶体的溶胶-凝胶转变过程,考察不同工艺条件对TiO2溶胶的黏度及胶凝时间的影响,并对其胶凝机理作了初步探讨.实验结果表明,获得稳定的TiO2溶胶的最佳工艺条件为:采用乙酰丙酮改性钛酸四丁酯,乙酰丙酮与钛酸四丁酯的摩尔比为1,水与醇盐的摩尔比为1,乙醇与醇盐的摩尔比为4,pH控制在2左右.With Ti （ OBu ）4 as alkoxide precursor, sol-gel transition of TiO2 sol was studied to obtain steady TiO2 sol. The influence of different reaction conditions on viscosity and gel time was investigated, and the mechanism of sol-gel process was also researched. Experimental results show that the acetylacetone can greatly improve the stability of the sols and prolonging the gel time. The optimum preparation conditions are as follows： the molar ratio of acetylacetone to Ti（OBu）4 is 1, Ti（OBu）4 to water is 1, and alcohol to Ti（OBu）4 is 4, and the pH value of the solution is about 2.

关 键 词：二氧化钛 溶胶-凝胶法 黏度 胶凝时间 

分 类 号：TQ174.758[化学工程—陶瓷工业]