Dynamic Stratification in Drying Films of Colloidal Mixtures
Dynamic Stratification in Drying Films of Colloidal Mixtures
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DOI：
10.1103/physrevlett.116.118301
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发表时间：
2016-03-18
影响因子：
8.6
通讯作者：
Sear, Richard P.
中科院分区：
文献类型：
--
作者：
Fortini, Andrea;Martin-Fabiani, Ignacio;Sear, Richard P.
在模拟和实验中，我们研究了含有大小胶粒混合物的薄膜在水中的干燥。在干燥过程中，混合物在底部形成一层较大的颗粒层，在顶部形成一层较小的颗粒层。我们开发了一个模型来说明在干燥过程中动态发展的渗透压梯度是分层背后的分离机制的原因。
In simulations and experiments, we study the drying of films containing mixtures of large and small colloidal particles in water. During drying, the mixture stratifies into a layer of the larger particles at the bottom with a layer of the smaller particles on top. We developed a model to show that a gradient in osmotic pressure, which develops dynamically during drying, is responsible for the segregation mechanism behind stratification.