Peristome-Mimetic Curved Surface for Spontaneous and Directional Separation of Micro Water-in-Oil Drops
Peristome-Mimetic Curved Surface for Spontaneous and Directional Separation of Micro Water-in-Oil Drops
复制标题
用于自发和定向分离微小油包水滴的仿口曲面
DOI：
10.1002/anie.201706665
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发表时间：
2017-10-23
影响因子：
16.6
通讯作者：
Jiang, Lei
中科院分区：
文献类型：
--
作者：
Li, Chuxin;Wu, Lei;Jiang, Lei
微尺度油包水液滴的分离在环境保护、生物检测和节约功能性油墨方面具有重要意义。目前，大体积油水分离主要通过膜分离和海绵吸附实现，但微滴分离仍是一个难题。在这里，我们报告说，而不是“即插即用”的分离模型，微小的油包水液滴可以分离成纯水和油滴通过“去相反的方式”在弯曲的peristome-mimetic表面，在毫秒，没有能量输入。更重要的是，这种溢流控制方法可以应用于处理表面张力差低至14.7 mN m（-1）的油包油液滴和粘度高达数百厘泊的粘性液体，这显著增加了微尺度分离的适用液体范围。此外，弯曲的拟孔口表面以高效率在不同方向上引导分离的液滴。
Separation of micro-scaled water-in-oil droplets is important in environmental protection, bioassays, and saving functional inks. So far, bulk oil-water separation has been achieved by membrane separation and sponge absorption, but micro-drop separation still remains a challenge. Herein we report that instead of the "plug-and-go" separation model, tiny water-in-oil droplets can be separated into pure water and oil droplets through "go-in-opposite ways" on curved peristome-mimetic surfaces, in milliseconds, without energy input. More importantly, this overflow controlled method can be applied to handle oil-in-oil droplets with surface tension differences as low as 14.7 mN m(-1) and viscous liquids with viscosities as high as hundreds centipoises, which markedly increases the range of applicable liquids for micro-scaled separation. Furthermore, the curved peristome-mimetic surface guides the separated drops in different directions with high efficiency.