| 剪切流场对ABA三嵌段共聚物囊泡形貌的影响 |
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| 引用本文： | 许江平,姜伟.剪切流场对ABA三嵌段共聚物囊泡形貌的影响[J].中国科学:化学,2011(2):385-390. |
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| 作者姓名： | 许江平 姜伟 |
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| 作者单位： | 高分子物理与化学国家重点实验室中国科学院长春应用化学研究所;中国科学院研究生院; |
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| 基金项目： | 国家自然科学基金(20874099,50930001,50921062,50725312); 国家重点基础研究项目(2007CB808000)资助 |
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| 摘 要： | 通过同轴圆筒剪切仪和磁子搅拌方式提供的剪切流场,研究了均匀和非均匀流场对ABA两亲性三嵌段共聚物囊泡的影响.研究发现,非均匀流场下囊泡尺寸及其分散度随剪切速率的增加呈现先增大后减小的规律.与搅拌形成的非均匀流场相比,在同轴剪切仪提供的均匀流场下形成的囊泡尺寸更加均匀.结果表明,剪切流场是影响囊泡形貌的重要因素,流场的不均匀性是导致组装体形貌结构多分散性的重要原因之一.
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| 关 键 词： | ABA三嵌段共聚物 自组装 囊泡 剪切流场 |
Effect of shear field to the morphology of ABA triblock copolymer vesicles |
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| XU JiangPing, & JIANG Wei State Key Laboratory of Polymer Physics , Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun ,China Graduate University of the Chinese Academy of Sciences,Beijing ,China.Effect of shear field to the morphology of ABA triblock copolymer vesicles[J].Scientia Sinica Chimica,2011(2):385-390. |
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| Authors: | XU JiangPing & JIANG Wei State Key Laboratory of Polymer Physics Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun China Graduate University of the Chinese Academy of Sciences Beijing China |
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| Institution: | XU JiangPing1,2 & JIANG Wei1 1 State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China 2 Graduate University of the Chinese Academy of Sciences,Beijing 100049,China |
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| Abstract: | ABA amphiphilic triblock copolymers self-assembling into vesicles were investigated in uniform shear field which generated in Couette flow cell,or in nonuniform shear field which produced by magnetic bar stirring.It was found that the size and size distribution of the vesicles first increased and then decreased as the shear rate increasing.In uniform shear flow,the size distribution of the vesicles was much narrower than that in nonuniform shear flow.The results indicated that shear flow was a key factor de... |
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| Keywords: | ABA triblock copolymers self-assembly vesicles shear field |
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