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Fusion and clustering of spherical micelles by extruding through a cylindrical channel

机译：通过圆柱通道挤出通过挤出球形胶束的融合和聚类

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Experiments have shown that worm-like cylindrical micelles can be obtained by extruding spherical micelles through a cylindrical channel. The uniaxial symmetry of the cylindrical confinement can help fuse the spherical micelles into the cylindrical phase. Here, a theoretical model is proposed to investigate this fusion transition driven by external pressure in the cylindrical channel. In this model, spherical micelles are formed by diblock copolymers dissolved in a homopolymer solvent. And the external pressure is controlled by the average center distance of the neighboring spherical micelles. In addition to the fusion transition, the addition of the homopolymers leads to a depletion effect induced by the attraction between adjacent spherical micelles. Thus, spherical micelles in the channel can correlate together and form a linear cluster. The free energy barrier of fusion and the free energy potential well of the clustering of spherical micelles are investigated by a numerical computation of the self-consistent mean field theory. We present a full phase diagram of these transitions depending on the radius of the channel and the external pressure.
机译：实验表明，蜗杆状圆柱形胶束可以通过挤出球形胶束通过圆柱通道来获得。圆柱形限制的单轴对称可以有助于使球形胶束熔化到圆柱形相中。这里，提出了理论模型来研究通过圆柱通道中的外部压力驱动的该熔化过渡。在该模型中，通过溶解在均聚物溶剂中的二嵌段共聚物形成球形胶束。外部压力由相邻球形胶束的平均中心距离控制。除了融合过渡之外，加入均聚物导致由相邻球形胶束之间的吸引引起的耗竭效果。因此，通道中的球形胶束可以将其相关联并形成线性簇。通过自洽平均场理论的数值计算研究了熔融的自由能屏障和球形胶束聚类的自由能量孔。我们呈现了这些过渡的完整相图，这取决于通道的半径和外部压力。

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    《RSC Advances》 |2019年第42期|共7页
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  • 正文语种 eng
  • 中图分类 化学;
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