Abstract
The interface between the particles and the carrier fluids has an important influence on the performance of magnetorheological fluid (MRF). In this study, ionic liquids and silicone oils with the same viscosity and different surface tensions were used as carrier fluids to prepare two different carbonyl iron powder (CIP) magnetorheological fluids. The rheological properties of the two magnetorheological fluids were evaluated by the MCR301 rotating rheometer. The experimental results indicate that ionic liquid-based MRF showed higher shear yield strength and more significant MR effect than silicone oil-based ones in higher magnetic field strength. A possible explanation was proposed and proved through experimental data analysis.
Highlights
Magnetorheological fluid (MRF) is an intelligent suspension that responds to a magnetic field (de Vicente et al, 2011; Xu et al, 2011; Ahamed et al, 2018)
The shear yield strength of magnetorheological fluid (MRF) is an important criterion for evaluating its performance
For MRF, the high shear yield strength reflects its higher MR effect, which is very beneficial for the application of MRF
Summary
Magnetorheological fluid (MRF) is an intelligent suspension that responds to a magnetic field (de Vicente et al, 2011; Xu et al, 2011; Ahamed et al, 2018). Its special feature is that under an external magnetic field, the originally flowing liquid can be transformed into a solid-like state, and when the magnetic field is removed, the original flow state can be restored (Carlson and Jolly, 2000). Ionic liquids have been used as carrier fluids for MRF (Guerrero-Sanchez et al, 2007; Gómez-Ramírez et al, 2011; Jönkkäri et al, 2014; Bombard et al, 2015), few people have noticed that its viscosity is similar to that of silicone oil, its surface tension is higher than that of silicone oil We will use ionic liquid as the carrier fluid of MRF to test the performance of ionic liquid-based MRF, and analyze the influence of interfacial on MRF performance by comparing with silicone oil-based MRF
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