| 中间嵌段为亲水性的BAB型三嵌段共聚物水溶液中初级聚集体的二次聚集行为研究 |
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| 引用本文： | 袁建军,杨子刚,程时远,江雷,封麟先,范志强.中间嵌段为亲水性的BAB型三嵌段共聚物水溶液中初级聚集体的二次聚集行为研究[J].高等学校化学学报,2004,25(1):166-169. |
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| 作者姓名： | 袁建军 杨子刚 程时远 江雷 封麟先 范志强 |
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| 作者单位： | 1. 湖北大学化学与材料科学学院, 武汉 430062;
2. 中国科学院化学研究所, 北京 100080;
3. 浙江大学高分子科学研究所, 杭州 310027 |
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| 基金项目： | 中国科学院有机固体重点实验室开放基金，国家“九七三”计划项目 (批准号 :G19990 6450 5)资助 |
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| 摘 要： | 采用TEM和AFM研究了PS(聚苯乙烯)43-b-PEO(聚氧乙烯)45-b-PS43和PS39-b-P4VP(聚4-乙烯基吡啶)98-b-PS39三嵌段共聚物在水介质中的球形胶束、囊泡和蠕虫状胶束之间的二次聚集行为.实验发现,初级聚集体的二次聚集具有不同的复杂程度.对称性的初级聚集体,如球形胶束和囊泡,其二次聚集表现出球形对称性;而非对称性初级聚集体(如蠕虫状胶束)二次聚集开始倾向于非对称性.BAB型的嵌段设计有利于初级聚集体的二次聚集发生.
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| 关 键 词： | 嵌段共聚物 自组装 二次聚集 囊泡 |
| 文章编号： | 0251-0790(2004)01-0166-04 |
| 收稿时间： | 2002-12-30 |
Studies on the Second Aggregation Behavior of Primary Aggregates from BAB Triblock Copolymers with a Hydrophilic Middle Block A in Aqueous Media |
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| YUAN Jian-Jun ,YANG Zi-Gang,CHENG Shi-Yuan,JIANG Lei,FENG Lin-Xian,FAN Zhi-Qiang.Studies on the Second Aggregation Behavior of Primary Aggregates from BAB Triblock Copolymers with a Hydrophilic Middle Block A in Aqueous Media[J].Chemical Research In Chinese Universities,2004,25(1):166-169. |
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| Authors: | YUAN Jian-Jun YANG Zi-Gang CHENG Shi-Yuan JIANG Lei FENG Lin-Xian FAN Zhi-Qiang |
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| Institution: | 1. College of Chemistry and Materials Science, Hubei University, Wuhan 430062, China;
2. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China;
3. Institute of Polymer Science, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | The second aggregation behavior of spherical micelles, spherical vesicles and worm-like micelles made from PS 43-b-PEO 45-b-PS 43 and PS 39-b-P4VP 98-b-PS 39 triblock copolymers was investigated by conventional Transmission Electron Microscope(TEM) and Atomic Force Microscope(AFM) techniques. It was observed that the second aggregation behaved the different complexity for different primary aggregates. For the symmetrical primary aggregates, such as spherical micelles and vesicles, the second aggregates displayed a symmetrical sphere. In contrast, for the unsymmerical worm-like primary micelles, the second aggregation tended to have an unsymmetrical shape. The BAB chain architecture was molecularly suggested to be responsible for the second aggregation. |
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| Keywords: | Block copolymer Self-assembly Second aggregation Vesicle |
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