Performance Tests and Microchain Model Validation of a Novel Kind of MR Fluid with GO-Coated Iron Particles
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 5
Abstract
Magnetorheological (MR) fluids are suspensions of microparticles or nanoparticles dispersed in carrier fluids, which contain iron particles, carrier fluids and additives. In this study, a novel kind of composite iron particle—graphene oxide (GO)-coated magnetic particles was adopted to prepare MR fluids together with surfactants-modified iron particles. The influence of dosage proportions of the two composite iron particles, volume fraction of iron particles, and the dosage of liquid paraffin on the performances of MR fluids was investigated through sedimentation stability, viscosity, and shear yield stress tests. The test results presented that GO-coated iron particles with low density and high-saturation magnetization were beneficial to the improvement of stability and adjustability. Additionally, dosage proportions of the two composite iron particles, volume fraction of iron particles, and the dosage of liquid paraffin all had significant influence on the performances of MR fluids. Finally, the mathematical model of shear yield stress of the MR fluid was deduced, and the calculated results were compared with the tested data, which had verified the correctness of the mathematical model.
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Acknowledgments
This study was financially supported by National Science Foundation for Distinguished Young Scholars of China (51625803), the Program for Changjiang Scholar Distinguished Professor of Education Ministry, Ten Thousand Talent Program (Innovation Leading Talents), the Program for Jiangsu Province 333 Talents, and the Priority Academic Program Development of Jiangsu Higher Education Institutions. These supports are gratefully acknowledged.
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 5 • May 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jul 15, 2017
Accepted: Oct 25, 2017
Published online: Mar 8, 2018
Published in print: May 1, 2018
Discussion open until: Aug 8, 2018
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