Study of Dynamic Viscoelasticity of a Mineral Oil-Based Magnetic Fluid

Zhanxian Li; Yifei Guo; Hujun Wang; Chengyao Deng; Jiahao Dong; Zhongru Song; Zhenkun Li

doi:10.3390/magnetochemistry9060143

Magnetochemistry (May 2023)

Study of Dynamic Viscoelasticity of a Mineral Oil-Based Magnetic Fluid

Zhanxian Li,
Yifei Guo,
Hujun Wang,
Chengyao Deng,
Jiahao Dong,
Zhongru Song,
Zhenkun Li

Affiliations

Zhanxian Li: Department of Mechanical Engineering, North China University of Science and Technology, Tangshan 063210, China
Yifei Guo: Department of Mechanical Engineering, North China University of Science and Technology, Tangshan 063210, China
Hujun Wang: School of Applied, China University of Labor Relation, Beijing 100048, China
Chengyao Deng: School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Jiahao Dong: School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Zhongru Song: Hebei Industrial Robot Industry Technology Research Institute, Tangshan 063000, China
Zhenkun Li: School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China

DOI: https://doi.org/10.3390/magnetochemistry9060143
Journal volume & issue: Vol. 9, no. 6
p. 143

Abstract

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Magnetic fluid is a field-responsive intelligent fluid, which has the flow characteristics of liquid and the elastic properties of solid. Because of its unique properties, it has a strong application prospect in the fields of magnetic soft robot, intelligent sensor, and so on. Dynamic viscoelasticity is a significant index to investigate the performance of magnetic fluid in the application process. In this paper, the dynamic viscoelasticity of a homemade mineral oil-based magnetic fluid was investigated under oscillatory shear experimental conditions using an MCR302 rheometer, and the effects of different temperatures and magnetic fields on the dynamic viscoelasticity were examined. Amplitude sweeps tests showed that the value of the storage modulus remained constant within the linear viscoelastic region (LVE) and the stable structure was not destroyed. As the magnetic field strength increased or the temperature increased, the range of the linear viscoelastic zone decreased. At large amplitude, the loss modulus will first appear as a peak and then decrease. The frequency sweep experiment showed that the storage modulus and loss modulus increased with the increase in angular frequency, and the greater the magnetic field intensity, the longer the internal structure relaxation time. When the magnetic field was constant, the higher the temperature, the smaller the storage modulus and loss modulus of the magnetic fluid. At high temperature, the loss coefficient of mesmeric fluid was large, and the magnetic fluid was more viscous. The lower the temperature is, the smaller the loss coefficient of the magnetic fluid is, and the magnetic fluid is more pliant. The study of dynamic viscoelasticity of magnetic fluids lays the foundation for establishing the complete structure intrinsic relationship of magnetic fluids and provides guidance for the application of magnetic fluids in magnetic 3D printing, droplet robot, and smart wear.

Published in Magnetochemistry

ISSN: 2312-7481 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: http://www.mdpi.com/journal/magnetochemistry

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