微流控
分散性
水溶液
瑞利散射
材料科学
双水相体系
纳米技术
摄动(天文学)
不稳定性
机械
瑞利-泰勒不稳定性
化学物理
化学工程
化学
光学
物理
高分子化学
物理化学
工程类
量子力学
作者
Alban Sauret,Ho Cheung Shum
摘要
We report an easy-to-implement method that allows the direct generation of water-in-water (w/w) single emulsions. The method relies on direct perturbation of the pressure that drives the flow of the dispersed phase of the emulsions. The resultant inner jet is induced to break up into droplets due to the growth of the perturbation through Rayleigh-Plateau instability [L. Rayleigh, Proc. R. Soc. London 29, 71–97 (1879)]; this leads to the formation of monodisperse droplets. By implementing this method on a modified microfluidic device, we directly generate water-in-water-in-water (w/w/w) double emulsions with good control over the size and the number of encapsulated droplets. Our approach suggests a route to apply droplet-based microfluidics to completely water-based systems.
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