Gravity-induced encapsulation of liquids by destabilization of granular rafts
Gravity-induced encapsulation of liquids by destabilization of granular rafts
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DOI：
10.1038/ncomms2869
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发表时间：
2013-05-01
影响因子：
16.6
通讯作者：
Stone, Howard A.
中科院分区：
文献类型：
--
作者：
Abkarian, Manouk;Protiere, Suzie;Stone, Howard A.
包裹着一层保护性颗粒盔甲的液滴和气泡在封装、稳定乳液和泡沫以及浮选技术中有许多应用。在这里，我们研究体力的作用，例如在浮选中，作为粒子连续包裹的一种手段。我们使用稠密的颗粒，它们在油-水界面上自组装成木筏。我们表明，这些木筏可以自发地或可控制地破坏稳定，形成装甲水包油液滴，这突出了普通颗粒材料在环境修复中的可能作用。我们进一步提出了一种连续生产的方法，并讨论了我们的方法对胶体尺度的推广。
Droplets and bubbles coated by a protective armour of particles find numerous applications in encapsulation, stabilization of emulsions and foams, and flotation techniques. Here we study the role of a body force, such as in flotation, as a means of continuous encapsulation by particles. We use dense particles, which self-assemble into rafts, at oil-water interfaces. We show that these rafts can be spontaneously or controllably destabilized into armoured oil-in-water droplets, which highlights a possible role for common granular materials in environmental remediation. We further present a method for continuous production and discuss the generalization of our approach towards colloidal scales.