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用石英晶体微天平研究磁流变液的胶体稳定性和磁场诱导有序化

Colloidal Stability and Magnetic Field-Induced Ordering of Magnetorheological Fluids Studied with a Quartz Crystal Microbalance.

作者信息

Rodriguez-López Jaime, Castro Pedro, de Vicente Juan, Johannsmann Diethelm, Elvira Luis, Morillas Jose R, Montero de Espinosa Francisco

机构信息

Institute of Physical and Information Technologies, CSIC, C/Serrano, 144, Madrid 28006, Spain.

Department of Applied Physics, Faculty of Sciences, University of Granada, c/Fuentenueva s/n, Granada 18071, Spain.

出版信息

Sensors (Basel). 2015 Dec 4;15(12):30443-56. doi: 10.3390/s151229808.

DOI:10.3390/s151229808
PMID:26690152
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4721728/
Abstract

This work proposes the use of quartz crystal microbalances (QCMs) as a method to analyze and characterize magnetorheological (MR) fluids. QCM devices are sensitive to changes in mass, surface interactions, and viscoelastic properties of the medium contacting its surface. These features make the QCM suitable to study MR fluids and their response to variable environmental conditions. MR fluids change their structure and viscoelastic properties under the action of an external magnetic field, this change being determined by the particle volume fraction, the magnetic field strength, and the presence of thixotropic agents among other factors. In this work, the measurement of the resonance parameters (resonance frequency and dissipation factor) of a QCM are used to analyze the behavior of MR fluids in static conditions (that is, in the absence of external mechanical stresses). The influence of sedimentation under gravity and the application of magnetic fields on the shifts of resonance frequency and dissipation factor were measured and discussed in the frame of the coupled resonance produced by particles touching the QCM surface. Furthermore, the MR-fluid/QCM system has a great potential for the study of high-frequency contact mechanics because the translational and rotational stiffness of the link between the surface and the particles can be tuned by the magnetic field.

摘要

这项工作提出使用石英晶体微天平（QCM）作为一种分析和表征磁流变（MR）流体的方法。QCM设备对其表面接触介质的质量、表面相互作用和粘弹性特性的变化敏感。这些特性使QCM适用于研究MR流体及其对可变环境条件的响应。MR流体在外部磁场作用下会改变其结构和粘弹性特性，这种变化由颗粒体积分数、磁场强度以及触变剂的存在等因素决定。在这项工作中，QCM共振参数（共振频率和耗散因子）的测量用于分析MR流体在静态条件下（即无外部机械应力时）的行为。在由颗粒接触QCM表面产生的耦合共振框架内，测量并讨论了重力作用下的沉降以及磁场施加对共振频率和耗散因子变化的影响。此外，MR流体/QCM系统在高频接触力学研究方面具有巨大潜力，因为表面与颗粒之间连接的平移和旋转刚度可通过磁场进行调节。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e25/4721728/1879c6f7c51a/sensors-15-29808-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e25/4721728/51e93375b9a3/sensors-15-29808-g005.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e25/4721728/9b8665318503/sensors-15-29808-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e25/4721728/1879c6f7c51a/sensors-15-29808-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e25/4721728/c1b0152994a8/sensors-15-29808-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e25/4721728/85a18acd39fd/sensors-15-29808-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e25/4721728/51e93375b9a3/sensors-15-29808-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e25/4721728/083d46c03429/sensors-15-29808-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e25/4721728/687e90e919c9/sensors-15-29808-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e25/4721728/9945ed3541d1/sensors-15-29808-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e25/4721728/bf17ef754ad3/sensors-15-29808-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e25/4721728/9b8665318503/sensors-15-29808-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4e25/4721728/1879c6f7c51a/sensors-15-29808-g011.jpg

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