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| CaCl2电解质对制备二氧化硅微球的影响 | |
| 引用本文： | 张琳,翟江,李克训,赵君华,李洪亮,万勇,赵修松. CaCl2电解质对制备二氧化硅微球的影响[J]. 功能材料, 2009, 40(10) |
| 作者姓名： | 张琳 翟江 李克训 赵君华 李洪亮 万勇 赵修松 |
| 作者单位： | 青岛大学,纤维新材料与现代纺织国家重点实验室培育基地多功能材料研究所,化学化工与环境学院,山东,青岛,266071;潍坊教育学院,化学工程系,山东,潍坊,262500 |
| 基金项目： | 国家自然科学基金资助项目(50602028,20803037); 山东省博士基金资助项目(2008BS06006); |
| 摘 要： | 对比研究了微量CaCl2电解质对直接法生长和以种子法生长制备二氧化硅微球的影响.随着CaCl2加入量的增加,两种制备途径所得球体粒径的大小和分散度都出现明显变化,当Ca2+的浓度达到3.3mmol/L时,颗粒已不能保持球体形状,开始成絮状物.通过对结果的对比分析,为理解二氧化硅球体生长机理提供了帮助. |
| 关 键 词： | 电解质 成核 二氧化硅 微球体 |
Electrolyte effect of CaCl_2 in the preparation of silica spheres |
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| ZHANG Lin,ZHAI Jiang,LI Ke-xun,ZHAO Jun-hua,LI Hong-liang,WAN Yong,ZHAO Xiu-song. Electrolyte effect of CaCl_2 in the preparation of silica spheres[J]. Journal of Functional Materials, 2009, 40(10) | |
| Authors: | ZHANG Lin ZHAI Jiang LI Ke-xun ZHAO Jun-hua LI Hong-liang WAN Yong ZHAO Xiu-song |
| Affiliation: | ZHANG Lin1,ZHAI Jiang2,LI Ke-xun1,ZHAO Jun-hua1,LI Hong-liang1,WAN Yong1,ZHAO Xiu-song1(1.Laboratory of New Fiber Materials and Modern Textile,The Growing Base for State Key Laboratory,College of Chemistry,Chemical Engineering and Environment,Qingdao University,Qingdao 266071,China,2 Department of Chemical Engineering,Weifang College of Education,Weifang 262500,China) |
| Abstract: | Electrolyte CaCl_2 was added to the reaction system during the formation of silica spheres in order to study the electrolyte effect.It has been shown that the addation of a trace of CaCl_2 can modify the growth mechanism of the spheres.The high concentration electrolyte reduced the value of Ck(critical nucleation concentration),which makes the creation of nuclei easier and provokes the competition between the nuclei formation and the sphere growth.When the concentration of the Ca2+ reached to a value of 3.3... |
| Keywords: | electrolyte microsphere crystal nucleus silica |
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