Microfluidic generation of monodisperse ultra-low interfacial tension oil droplets in water
Microfluidic generation of monodisperse ultra-low interfacial tension oil droplets in water
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DOI：
10.1039/c4ra14967j
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发表时间：
2015-01-01
期刊：
影响因子：
3.9
通讯作者：
Ces, Oscar
中科院分区：
文献类型：
--
作者：
Bolognesi, Guido;Hargreaves, Alex;Ces, Oscar
我们提出了一种新的微流控方法，用于在界面张力为1mU N m(-1)的水中生成单分散油滴。在接近微乳液相变的条件下，使用含有表面活性剂气溶胶OT、庚烷、水和氯化钠的水包油乳状液，主动控制微流控装置内液-液界面处的表面张力，以产生单分散液滴。这些液滴在破裂和聚结率方面表现出很高的稳定性。通过对液滴界面上的热诱导毛细波的真实空间检测，确定所生成的乳状液处于超低张力区域。
We present a novel microfluidic approach for the generation of monodisperse oil droplets in water with interfacial tensions of the order of 1 mu N m(-1). Using an oil-in- water emulsion containing the surfactant aerosol OT, heptane, water and sodium chloride under conditions close to the microemulsion phase transition, we actively controlled the surface tension at the liquid-liquid interface within the microfluidic device in order to produce monodisperse droplets. These droplets exhibited high levels of stability with respect to rupture and coalescence rates. Confirmation that the resultant emulsions were in the ultralow tension regime was determined using real space detection of thermally-induced capillary waves at the droplet interface.