Deformation of a Capsule in a Spinning Drop Apparatus
Deformation of a Capsule in a Spinning Drop Apparatus
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旋转滴落装置中胶囊的变形
DOI：
10.1006/jcis.1998.5438
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发表时间：
1998
影响因子：
3.6
通讯作者：
D. Barthès
中科院分区：
文献类型：
--
作者：
G. Pieper;H. Rehage;D. Barthès
摘要 本文研究了在油水界面合成的超薄氨基甲基丙烯酸酯膜的流变特性。我们测量了这些二维网络的交联反应动力学、零剪切模量和非线性流变特性。使用特殊的表面流变仪在平面界面上进行测量。一旦稳定，膜就会表现出橡胶弹性。此外，我们还使用相同类型的界面聚合形成了小乳液滴。为了获得有关所得微胶囊机械性能的更多信息，我们开发了一种新的实验技术，该技术包括在旋转滴落装置中测量胶囊的变形。变形过程的理论分析允许计算界面表观弹性杨氏模量。通过表面剪切模量与杨氏模量的比较，可以估计表面泊松比，此处该比大约为零。这些结果表明区域可压缩各向异性膜的存在。
Abstract This paper studies the rheological properties of ultrathin aminomethacrylate membranes that are synthesized at the interface between oil and water. We have measured the kinetics of the cross-linking reactions, the zero shear modulus, and the nonlinear rheological properties of those two-dimensional networks. The measurements were performed at a planar interface using a special surface rheometer. Once stabilized, the membranes exhibit rubber-elastic properties. In addition, we have formed small emulsion droplets using the same type of interfacial polymerization. In order to get more information on the mechanical properties of the resulting microcapsules, we have developed a new experimental technique that consists in measuring the deformation of a capsule in a spinning drop apparatus. A theoretical analysis of the deformation process allows an interface apparent elastic Young modulus to be calculated. From a comparison of the surface shear modulus with the Young modulus, it is then possible to estimate the surface Poisson ratio, which is here approximately zero. These results point to the existence of area compressible anisotropic membranes.
DOI：
10.1115/1.3138452
发表时间：
1984
期刊：
Journal of biomechanical engineering
影响因子：
--
作者：
Hochmuth,RM;Berk,DA
通讯作者：
Berk,DA