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学科主题: 高分子化学
题名: Smectic polymer micellar aggregates with temperature-controlled morphologies
其他题名: 碟状聚合物微囊泡聚集体形貌的温度调控
作者: Jia L(贾林) ; Daniel Levy ; Dominique Durand ; Marianne Imperor-Clerc ; Cao AM(曹阿民) ; Li MH(李敏慧)
通讯作者: 曹阿民 ; 李敏慧
刊名: Soft Matter
发表日期: 2011
卷: 7, 期:16, 页:7395-7403
收录类别: SCI
部门归属: 法国巴黎第六大学居里研究所; 法国巴黎第十一大学; 中科院上海有机化学研究所
英文摘要: The morphological control of polymer micellar aggregates is a very important issue in applications such as drug delivery and material science. We report the temperature-controlled formation of nanotubes, nanofibers, ellipsoidal and faceted vesicles, and spherical aggregates by nanoprecipitation of amphiphilic diblock copolymers in dioxane/water mixture. The copolymers used are composed of a cholesterol-based smectic liquid crystal core-forming block and a PEG hydrophilic block. The morphology of the micellar self-assemblies was studied by transmission electron microscopy (TEM), cryo-electron microscopy (cryo-TEM) and atomic force microscopy (AFM). In all these aggregates smectic organization is clearly present in the hydrophobic cores. We propose a smectic "liquid crystallization"-driven self-assembly process for the formation of nanofibers and nanotubes on the basis of small angle X-ray scattering (SAXS) studies during the nanoprecipitation. The temperature dependence of the morphology (from T = 5-55 degrees C) is explained by the free energy consideration. The different aggregates finally dispersed in water after the removal of dioxane are thermally stable at temperature <= 55 degrees C and can be preserved for years at room temperature without structural change.
语种: 英语
相关网址: 查看原文
WOS记录号: WOS:000293412900035
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/22968
Appears in Collections:高分子材料研究室_期刊论文

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Recommended Citation:
Jia L,Daniel Levy,Dominique Durand,et al. Smectic polymer micellar aggregates with temperature-controlled morphologies[J]. Soft Matter,2011,7(16):7395-7403.
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