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arXiv 1205.0141cond-mat.soft
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表面活性剂二元混合物的结构形成:囊泡向双胞和章鱼状胶束的开放

Structure formation in binary mixtures of surfactants: vesicle opening-up to bicelles and octopus-like micelles

Hiroshi Noguchi

摘要:

用粗粒化分子模拟方法研究了表面活性剂二元混合物中胶束的形成。当由脂质和去污剂类型的分子组成的囊泡破裂时,通常形成盘状胶束,即双胞。结果表明,随着表面活性剂配比和临界胶束浓度的变化,也可形成杯状囊泡和与蠕虫状胶束相连的双胞。所得胶束的章鱼形状与[S. Jain和F. S. Bates,Macromol. 37,1511(2004).]。蠕虫状胶束和双胞之间的两种类型的连接结构被揭示。

英文摘要:

Micelle formation in binary mixtures of surfactants is studied using a coarse-grained molecular simulation. When a vesicle composed of lipid and detergent types of molecules is ruptured, a disk-shaped micelle, the bicelle, is typically formed. It is found that cup-shaped vesicles and bicelles connected with worm-like micelles are also formed depending on the surfactant ratio and critical micelle concentration. The obtained octopus shape of micelles agree with those observed in the cryo-TEM images reported in [S. Jain and F. S. Bates, Macromol. 37, 1511 (2004).]. Two types of connection structures between the worm-like micelles and the bicelles are revealed.

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