Spontaneous deformation and fission of oil droplets on an aqueous surfactant solution
Spontaneous deformation and fission of oil droplets on an aqueous surfactant solution
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DOI：
10.1103/physreve.102.042603
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发表时间：
2020-10-06
影响因子：
2.4
通讯作者：
Kitahata, Hiroyuki
中科院分区：
文献类型：
--
作者：
Okada, Masahide;Sumino, Yutaka;Kitahata, Hiroyuki
研究了含棕榈酸十四烷液滴在硬脂基三甲基氯化铵（STAC）水溶液中的自发形变和分裂。在该体系中，由PA和STAC组成的凝胶层的生成和破裂导致液滴变形和分裂。为了研究液滴裂变动力学的特征，我们得到了裂变产生的液滴数量的时间序列，并证实了该数量在一定的STAC浓度有一个峰值。由于变形是导致液滴裂变的主要原因，本文从液滴-边界速度的时空相关性出发，分析了可能与裂变动力学有关的四个参数。发现与膨胀速度对应的参数与裂变动力学参数之间的正相关性最强，从而得出结论：膨胀速度越快，裂变动力学参数越大。
We investigated the spontaneous deformation and fission of a tetradecane droplet containing palmitic acid (PA) on a stearyltrimethylammonium chloride (STAC) aqueous solution. In this system, the generation and rupture of the gel layer composed of PA and STAC induce the droplet deformation and fission. To investigate the characteristics of the droplet-fission dynamics, we obtained the time series of the number of the droplets produced by fission and confirmed that the number has a peak at a certain STAC concentration. Since the fission of the droplet should be led by the deformation, we analyzed four parameters which may relate to the fission dynamics from the spatiotemporal correlation of the droplet-boundary velocity. We found that the parameter which corresponds to the expansion speed had the strongest positive correlation among them, and thus we concluded that the faster deformation would be the key factor for the fission dynamics.