Synthesis of composite emulsions and complex foams with the use of microfluidic flow-focusing devices
Synthesis of composite emulsions and complex foams with the use of microfluidic flow-focusing devices
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DOI：
10.1002/smll.200700238
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发表时间：
2007-10-01
期刊：
影响因子：
13.3
通讯作者：
Whitesides, George M.
中科院分区：
文献类型：
--
作者：
Hashimoto, Michinao;Garstecki, Piotr;Whitesides, George M.
描述了一种形成稳定的复合水乳液的方法：1)不同家族的氮气气泡的组合，2)有机流体（全氟（甲基）十烷或十六烷）不同家族的液滴的组合，以及3)气泡和液滴的组合。由两个或三个微流体聚焦单元组成的系统耦合到单个出口通道。复合乳剂的组成和不同类型的成分（气泡或液滴）的数量都可以精确地调整。微流体技术的使用，与紧密耦合的流动聚焦单元，保证了乳剂在受控的局部化学计量下进行局部混合。乳剂在非平衡过程中自组装，形成各种高度组织的周期性晶格。
A method is described for the formation of stable, composite aqueous emulsions of 1) combinations of distinct families of bubbles of nitrogen, 2) combinations of distinct families of droplets of an organic fluid (either perfluoro(methyl)decalin or hexadecane), and 3) combinations of bubbles and droplets. A system of two or three microfluidic flow-focusing units is coupled to a single outlet channel. The composite emulsions can be precisely tuned, both in their composition and in the number fraction of components - either bubbles or droplets - of different types. The use of microfluidic technology, with closely coupled flow-focusing units, guarantees that the emulsions are mixed locally at a controlled local stoichiometry. The emulsions self-assemble in a nonequilibrium process to form a wide variety of highly organized periodic lattices.