| 分散聚合法制备二氧化硅/ 聚苯乙烯单分散复合微球 |
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| 引用本文： | 李永超,张毅,金日光.分散聚合法制备二氧化硅/ 聚苯乙烯单分散复合微球[J].复合材料学报,2005,22(2):21-26. |
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| 作者姓名： | 李永超 张毅 金日光 |
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| 作者单位： | 北京化工大学材料科学与工程学院, 北京 100029 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 在醇/ 水混合介质中用分散聚合方法制备二氧化硅/ 聚苯乙烯单分散复合微球。探讨了分散聚合法制备无机/ 有机复合微球的过程, 考察了分散聚合反应的动力学过程。SEM 和TEM 观察结果表明: 在醇/ 水混合介质中, 用PVP K-30 作为稳定剂, 用分散聚合法制备了单分散的以二氧化硅为核、聚苯乙烯为壳的复合微球,成功实现了聚苯乙烯对二氧化硅的包覆, 复合微球的平均粒径为1.25μm , 分散系数ε为0.035 , 达到了单分散水平。还考察了稳定剂的浓度对复合微球粒径的影响, 当稳定剂PVP K-30 浓度增加时, 发现微球的粒径有所减小, 而微球的单分散性提高。
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| 关 键 词： | 分散聚合 二氧化硅 聚苯乙烯 复合微球 单分散性 包覆 |
| 文章编号： | 1000-3851(2005)02-0021-06 |
| 收稿时间： | 2004-03-31 |
| 修稿时间： | 2004-07-09 |
SILICON DIOXIDE/ POLYSTYRENE MONODISPERSE COMPOSITE MICROSPHEREBY DISPERSION POLYMERIZATION |
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| LI Yongchao,ZHANG Yi,JIN Riguang.SILICON DIOXIDE/ POLYSTYRENE MONODISPERSE COMPOSITE MICROSPHEREBY DISPERSION POLYMERIZATION[J].Acta Materiae Compositae Sinica,2005,22(2):21-26. |
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| Authors: | LI Yongchao ZHANG Yi JIN Riguang |
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| Affiliation: | College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China |
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| Abstract: | The silicon dioxide (SiO2 ) / polystyrene ( PS) composite microspheres were prepared by dispersion polymerization in ethanol/ water medium. The process of dispersion polymerization was investigated , and the kinetics ofdispersion polymersion with nano-SiO2 in the reaction system was studied. The samples were characterized by microscopy techniques (SEM ,TEM) . It is shown that nano-SiO2 particles are encapsulated by PS af ter dispersion polymerization in ethanol/ water medium using polyvinylpyrrolidone ( PVP K-30) as stabilizer. The average size of thecomposite microsphere is 1.25μm and the dispersion coefficientεis 0.035. The effect s of stabilizer concent ration onthe size of the microspheres were studied. |
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| Keywords: | dispersion polymerization silicon dioxide polystyrene composite microsphere monodisperse encapsulation |
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