| Effect of Variant Counterions on Stability and Particle Size of Silica Sol |
| |
| 作者姓名： | 潘明初 杨宇翔 应海平 贾祥臣 陈娅如 唐岳 |
| |
| 作者单位： | [1]College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China [2]Department of Chemistry, East China University of Science ＆ Technology, Shanghai 200237, China [3]State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, Jiangsu 210093, China |
| |
| 基金项目： | Project supported by the National Natural Science Foundation of China （No. 20577010）. |
| |
| 摘 要： | The effects of variant counterions with ionic strength of 0.05, 0.10, 0.20 and 0.25 mol·kg^-1 on the stability and particle size of silica sols have been studied using the traditional methods of Ubbelohde viscosity measurement, TEM and titration respectively, finding that the stability and particle size of the silica sols are all concerned with the acidic, positively electric properties and the sizes of the counterions, as well as the attraction between the counterions and surface silicon hydroxyl groups of the silica sols. The small positively charged counterions lead to the decrease in particle sizes, making the silica sol the most stable. But the larger weakly acidic counterions can restrict the particle sizes of the silica sols and easily make the sols coagulate. It was also found that there existed a linear relationship between log r and log η, which has not ever been reported. The effect of temperature on the stability and particle sizes was also discussed.
|
| 关 键 词： | 硅溶胶 补偿离子 稳定性 粒子尺寸 |
| 修稿时间： | 2006-08-22 |
Effect of Variant Counterions on Stability and Particle Size of Silica Sol |
| |
| PAN, Ming-Chu YANG, Yu-Xiang YING, Hai-Ping JIA, Xiang-Chen CHEN, Ya-Ru TANG, Yue.Effect of Variant Counterions on Stability and Particle Size of Silica Sol[J].Chinese Journal of Chemistry,2007,25(10):1514-1521. |
| |
| Authors: | PAN Ming-Chu YANG Yu-Xiang YING Hai-Ping JIA Xiang-Chen CHEN Ya-Ru TANG Yue |
| |
| Institution: | 1. College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China;2. Department of Chemistry, East China University of Science & Technology, Shanghai 200237, China;3. State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, Jiangsu 210093, China |
| |
| Abstract: | The effects of variant counterions with ionic strength of 0.05, 0.10, 0.20 and 0.25 mol·kg?1 on the stability and particle size of silica sols have been studied using the traditional methods of Ubbelohde viscosity measurement, TEM and titration respectively, finding that the stability and particle size of the silica sols are all concerned with the acidic, positively electric properties and the sizes of the counterions, as well as the attraction between the counterions and surface silicon hydroxyl groups of the silica sols. The small positively charged counterions lead to the decrease in particle sizes, making the silica sol the most stable. But the larger weakly acidic counterions can restrict the particle sizes of the silica sols and easily make the sols coagulate. It was also found that there existed a linear relationship between log r and log η, which has not ever been reported. The effect of temperature on the stability and particle sizes was also discussed. |
| |
| Keywords: | silica sol counterion stability particle size temperature |
| 本文献已被 维普 等数据库收录！ |
|
