Measurements of the Surface Elasticity in Medium Frequency Range Using the Oscillating Bubble Method.
Measurements of the Surface Elasticity in Medium Frequency Range Using the Oscillating Bubble Method.
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使用振荡气泡法测量中频范围内的表面弹性。
DOI：
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发表时间：
1998
影响因子：
9.9
通讯作者：
K. Lunkenheimer
中科院分区：
文献类型：
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作者：
K. Wantke;H. Fruhner;Jiping Fang;K. Lunkenheimer
各种实验技术可用于研究动态表面张力，并且已经建立了普遍接受的这些动力学理论模型。然而，可靠的流体表面流变参数非常稀缺。因此，需要对慢速和快速过程或理论计算产生的流变参数进行比较。特别是，需要对复表面弹性模量进行全面的实验验证，该模量以适当的方式表征流体表面的动态行为。为此，开发了一种新版本的振荡气泡法，可以精确测量 3-500 Hz 频率范围内的复弹性模量。通过这种方法，可以在中频下验证动态表面张力理论的假设。新的实验结果，特别是吉布斯弹性的实验测定表明，这些假设仅对更快的过程近似有效。然而，通过对已建立的模型进行轻微修改，可以解释实验结果。这些实验是使用不同表面活性剂浓度的十三烷基二甲基氧化膦、脂肪酸、正烷醇和 Triton X-100 的溶液进行的。 Copyright 1998 Academic Press.
Various experimental techniques are available for the investigation of dynamic surface tension, and a generally accepted theoretical model of these dynamics has been established. However, reliable rheological parameters of a fluid surface are very scarce. Therefore, comparisons of rheological parameters resulting from slow and faster processes or from theoretical calculations are required. In particular, a comprehensive experimental verification of the complex surface elasticity modulus which characterizes the dynamic behavior of a fluid surface in an appropriate manner is desirable. For this reason a new version of oscillating bubble method was developed which allows exact measurements of the complex elasticity modulus in the frequency range 3-500 Hz. With this method the assumptions of the theory of dynamic surface tension can be verified for medium frequencies. The new experimental results, in particular the experimental determination of the Gibbs elasticity, reveal that these assumptions are only approximately valid for faster processes. However, with a slight modification of the established model the experimental results can be explained. These experiments were carried out with solutions of tridecyl dimethyl phosphine oxide, fatty acids, n-alkanols, and triton X-100 at different surfactant concentrations. Copyright 1998 Academic Press.
肺表面活性剂磷脂、疏水蛋白和中性脂质膜的动态表面活性。
影响因子：
6.5
作者：
Wang,Z;Hall,SB;Notter,RH
通讯作者：
Notter,RH