Direct Observation of Splitting in Oil-In-Water-In-Oil Emulsion Droplets via a Microchannel Mimicking Membrane Pores
Direct Observation of Splitting in Oil-In-Water-In-Oil Emulsion Droplets via a Microchannel Mimicking Membrane Pores
复制标题
DOI：
10.1021/acs.langmuir.7b03331
复制
发表时间：
2017-12-12
期刊：
影响因子：
3.9
通讯作者：
Nakao, Shin-ichi
中科院分区：
文献类型：
--
作者：
Akamatsu, Kazuki;Minezaki, Koki;Nakao, Shin-ichi
直接观察双乳液液滴渗透通过微通道，模仿100个有趣的膜孔的孔隙率为66.7%，提供了关于多孔膜中的分裂机制的见解。微通道采用标准软光刻法制备，油包水包油双乳液液滴采用玻璃毛细管装置制备。通过将流速从0.5改变到5.0 × 10（-2）m/s（-1），观察到三种特征行为：（a）进入一个通道而不分裂;（B）分成两个较小的组分;和（c）双重乳液液滴的中间水相汽提成较小的双重乳液液滴和较小的油包水单一乳液液滴。讨论的机制相对于粘性力和界面张力的平衡，与通道的尖端的接触点，和中间液滴内的最里面的液滴的相对位置。
Direct observation of double emulsion droplet permeation through a microchannel that mimicked 100 fun membrane pores with a porosity of 66.7% provided insights regarding splitting mechanisms in porous membranes. The microchannel was fabricated by standard soft lithography, and the oil-in-water-in-oil double emulsion droplets were prepared with a glass capillary device. By changing the flow rate from 0.5 to 5.0 X 10(-2) m s(-1), three characteristic behaviors were observed: (a) passage into one channel without splitting; (b) division into two smaller components; and (c) stripping of the middle water phase of the double emulsion droplets into a smaller double emulsion droplet and a smaller water-in-oil single emulsion droplet. The mechanisms are discussed with respect to the balance of viscous forces and interfacial tension, the contact point with the tip of the channel, and the relative position of the innermost droplet within the middle droplet.