Self-assembly structures of amphiphilic multiblock copolymer in dilute solution
Self-assembly structures of amphiphilic multiblock copolymer in dilute solution
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DOI：
10.1039/c2sm27092g
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发表时间：
2013-01
期刊：
影响因子：
3.4
通讯作者：
Jing Zhang;Zhong-yuan Lu;Zhao-Yan Sun
中科院分区：
文献类型：
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作者：
Jing Zhang;Zhong-yuan Lu;Zhao-Yan Sun
用布朗动力学方法研究了溶剂条件和主链刚性对两亲性多嵌段共聚物在稀溶液中自组装结构的影响。观察到各种有趣的结构，如单花胶束，多花胶束，以及单或多桥结构。一般来说，高疏水性组分有利于花状胶束结构的形成，而半柔性链易于形成桥结构。我们还研究了疏水组分和亲水组分的比例对自组装结构的影响。从我们的相图中，我们发现，一个高的组分比例的疏水性嵌段有利于形成具有各种结构模式的胶束。通过增加多嵌段共聚物的链长，观察到单花到多花的转变。定义明确的多室蠕虫状胶束可以从预组装的花胶束在溶剂中，这是穷人的两个组件。
We study the influence of solvent conditions and the chain backbone stiffness of an amphiphilic multiblock copolymer on its self-assembly structures in dilute solution with Brownian dynamics simulations. Various interesting structures, such as single-flower micelle, multi-flower micelle, and single or multi-bridge structures, are observed. In general, highly hydrophobic components benefit the formation of flower micelle structures, while semi-flexible chains are prone to forming bridge structures. We also study the influence of the ratio between hydrophobic and hydrophilic components on self-assembly structures. From our phase diagram, we find that a high component ratio for the hydrophobic blocks favors the formation of micelles with various structural patterns. A single to multi-flower transition is observed by increasing the chain length of the multiblock copolymer. Well-defined multicompartment wormlike micelles can be obtained from pre-assembled flower micelles in a solvent that is poor for both components.