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首页> 外文期刊>Langmuir: The ACS Journal of Surfaces and Colloids >Contact Mechanics Studies with the Quartz Crystal Microbalance:Origins of the Contrast Factor for Polymer Gels and Solutions
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Contact Mechanics Studies with the Quartz Crystal Microbalance:Origins of the Contrast Factor for Polymer Gels and Solutions

机译：石英晶体微天平的接触力学研究：聚合物凝胶和溶液对比因子的来源

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摘要

A contact mechanics methodology utilizing the quartz crystal microbalance (QCM) has been applied to study the spreading behavior of polymer solutions and gels.Changes in the resonant frequency and in the dissipation are monitored as these materials are brought into contact with the electrode surface of the QCM.The primary application is in studies of elastic polymer gels,where spreading over the surface of the QCM is limited by the elasticity of the gel.Simultaneous measurement of the applied loads and displacements,along with measurement of the QCM/gel contact area,the frequency shift,and the dissipation,enable us to calibrate the QCM as a contact sensor.While changes in the frequency and dissipation both depend linearly on the contact area,measurements of the dissipation provide a more reliable indicator.The relationship between the dissipation and the contact area is determined by the solvent viscosity and by the high-frequency intrinsic viscosity of the system of interest.This result is consistent with previous results on the high-frequency rheological behavior of polymer solutions.
机译：已采用利用石英晶体微量天平（QCM）的接触力学方法来研究聚合物溶液和凝胶的扩散行为。当这些材料与电极的电极表面接触时，监测共振频率和耗散的变化。 QCM。主要用途是研究弹性聚合物凝胶，其中QCM表面的扩散受到凝胶弹性的限制。同时测量施加的载荷和位移，以及测量QCM /凝胶接触面积，频率偏移和耗散使我们能够校准作为接触传感器的QCM。虽然频率​​和耗散的变化都线性地取决于接触面积，但是耗散的测量值提供了更可靠的指标。接触面积取决于溶剂粘度和目标体系的高频特性粘度。与先前关于聚合物溶液高频流变行为的结果一致。

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