Double Emulsion Droplets as Microreactors for Synthesis of Mesoporous Hydroxyapatite
Double Emulsion Droplets as Microreactors for Synthesis of Mesoporous Hydroxyapatite
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DOI：
10.1021/cm9028935
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发表时间：
2009-11-24
影响因子：
8.6
通讯作者：
Weitz, David A.
中科院分区：
文献类型：
--
作者：
Shum, Ho Cheung;Bandyopadhyay, Amit;Weitz, David A.
介绍了一种利用复乳液滴作为微反应器合成介孔羟基磷灰石(HAP，(Ca)(10)，(PO4)(6)(OH)(2))的新方法。利用毛细管微流控技术，可以很容易地调节液滴微反应器的尺寸和几何形状。双乳液滴兼具屏蔽反应物和按需添加反应物的优点，这使它们成为用途广泛的微反应器。这种液滴微反应器还可以简单地可视化HAP的形成过程，以及控制合成的HAP中的孔隙率。用我们的技术制备的粉末具有显著的微观结构，并显著提高了比表面积和纳米孔隙率。我们的结果为利用复乳液滴控制无机粒子的纳米孔隙率和形貌提供了一种新的合成方法。
We introduce a novel approach for synthesizing mesoporous hydroxyapatite (HAp, (Ca)(10), (PO4)(6)(OH)(2)) using double emulsion droplets as microreactors. By using capillary microfluidic techniques, the size and the geometry of the droplet microreactors can be tuned easily. Double emulsion droplets offer the combined advantages of both shielding the reactants and on-demand addition of reactants; this makes them highly versatile microreactors. Such droplet microreactors also enable simple visualization of the HAp formation process as well as control over the porosity in the HAp that is synthesized. Powder formed with our technique demonstrates a remarkable microstructure, as well as significantly enhanced BET specific average surface area and nanoscale porosity. Our results present a novel synthesis approach for controlling the nanoscale porosity and the morphology of inorganic particles using double emulsion droplets.