文献类型：期刊文献

中文题名：两亲性/双疏性嵌段共聚物共混体系的自组装行为研究

英文题名：Self-assembly Behavior of Mixtures of Amphiphilic AB Block Copolymers and Solvophobic BC Block Copolymers

作者：曹旭光[1];蒋涛[1];王立权[1];张良顺[1];林嘉平[1];蔡春华[1]

机构：[1]华东理工大学上海市先进聚合物材料重点实验室材料科学与工程学院,上海200237

年份：2015

卷号：25

期号：4

起止页码：475

中文期刊名：高分子学报

外文期刊名：Acta Polymerica Sinica

收录：CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000353937300015)】；北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家自然科学基金(基金号21234002;21304035);中央高校基本科研业务费专项资金(项目号222201314024;WD1214008)资助项目

语种：中文

中文关键词：嵌段共聚物;共混;自组装;聚集体;耗散粒子动力学

外文关键词：Block copolymer, Mixture, Self-assembly, Muhicompartment micelle, Dissipative particle dynamics

摘要：采用耗散粒子动力学方法,研究了两亲性嵌段共聚物和双疏性嵌段共聚物共混体系的自组装行为,探讨了双疏性嵌段共聚物的浓度以及双疏性嵌段共聚物的嵌段体积分数对聚集体结构的影响.结果表明,随着双疏性嵌段共聚物浓度的增加,聚集体发生自囊泡到棒状胶束再到同心圆多舱胶束的转变,且当浓度较高时,同心圆多舱胶束的同心圆层数量与浓度密切相关.当双疏性嵌段共聚物中的嵌段体积分数降低时,球形胶束由同心圆结构转变为非同心圆结构.此外,利用Minkowski泛函方法表征了多舱胶束的形成过程,发现这是一个先形成大尺度球形结构、再形成小尺度内核结构的分级组装过程.
Self-assembly of mixtures of amphiphilic AB diblock copolymers and solvophobic BC diblock copolymers in selective solvents was investigated by dissipative particle dynamics simulations. A series of aggregates such as multicompartment micelles were observed. Density profiles of the aggregates were plotted to gain insight into the details of the aggregates. It was found that the BC block copolymers mainly occupy the cores of the aggregates to increase the hierarchy of the structures. Effects of eopolymer concentration and block length on the aggregates were studied. As the concentration of BC diblock copolymers increases, a morphological transformation from vesicles to cylindrical micelles and then to spherical multicompartment micelles occurs. At high concentration of BC diblock copolymers, the number of concentric layers within spherical micelles was found to be significantly dependent on the concentration of BC copolymers. By tuning the block length of C block length, both the concentric and nonconcentric multicompartment micelles were found. In addition to the morphological studies, the dynamic process was further analyzed with Minkowski functionals. The results show that the formation of muhieompartment micelles is a hierarchical process of selfassembly. During the self-assembly, the large-length-scale structures are first formed, and then the small-lengthscale structures within the cores gradually appears. The present simulation resuhs could provide in-depth information about the mechanism behind the formation of muhicompartment micelles from mixtures of amphiphilic and solvophobic copolymers, and also could provide guide for preparation of controllable structures for advanced functional nano-devices.