Deformation and bursting of nonspherical polysiloxane microcapsules in a spinning-drop apparatus
Deformation and bursting of nonspherical polysiloxane microcapsules in a spinning-drop apparatus
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DOI：
10.1016/j.jcis.2004.08.129
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发表时间：
2005-02-01
影响因子：
9.9
通讯作者：
Barthès-Biesel, D
中科院分区：
文献类型：
--
作者：
Husmann, M;Rehage, H;Barthès-Biesel, D
我们分析了非球形有机硅氧烷胶囊在离心场中的变形和破裂过程。在商业旋转滴张力计中以不同的管旋转值进行测量。对受到离心力作用的初始椭球弹性壳的力学进行了理论分析，其中胶囊的变形被预测为初始几何形状和膜弹性特性的函数。对于不同类型的有机硅氧烷膜，泊松数在 0 到 0.9 之间变化。这种现象表明在机械应力开始时膜厚度显着减小。破膜过程总是在胶囊的极端之一开始。这种破裂过程可以用推导的理论模型来解释。 (C) 2004 Elsevier Inc. 保留所有权利。
We analyze the deformation and bursting process of nonspherical organosiloxane capsules in centrifugal fields. Measurements were performed in a commercial spinning-drop tensiometer at different values of tube rotation. A theoretical analysis of the mechanics of initially ellipsoidal elastic shells subjected to centrifugal forces is developed where the deformation of the capsule is predicted as a function of the initial geometry and membrane elastic properties. For different types of organosiloxane membranes the Poisson number varies between 0 and 0.9. This phenomenon points to a considerable reduction of the membrane thickness at the onset of mechanical stress. Membrane-breaking processes always initiated at one of the pole ends of the capsules. Such rupture processes can be interpreted in terms of the derived theoretical model. (C) 2004 Elsevier Inc. All rights reserved.