Facile synthesis of hierarchically structured flower-like Fe3O4 microspheres for high-performance magnetorheological fluids

Wang, Guangshuo; Zhao, Dexing; Li, Nannan; Zeng, Yingzhe; Han, Shuai; Ma, Yingying; Dong, Xufeng; Yu, Rongmin

doi:10.1016/j.jiec.2019.06.040

Cited by 43 publications

(17 citation statements)

References 45 publications

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“…Varying shape has been another way to control iron oxide‐based MRF properties. Wang et al [ 154 ] prepared flower‐like Fe 3 O 4 microspheres with a hierarchical structure (F/Fe 3 O 4 ) by a one‐step solvothermal method, dissolving ferric chloride and hexamethylenetetramine in ethylene glycol and heating at 160 °C for 12 h. The uniform 3D porous flower‐like microspheres of 3.2 μm Fe 3 O 4 were composed of several dozen petal‐like intercrossed 53.6 nm thick nanosheets. The authors reported that the F/Fe 3 O 4 showed superparamagnetic behavior with an M s of 58.8 emu g −1 .…”

Section: Mrf With Different Magnetic Dispersed Phasesmentioning

confidence: 99%

Performance and Stability of Magnetorheological Fluids—A Detailed Review of the State of the Art

Thiagarajan

Koh

2021

Adv Eng Mater

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Magnetorheological fluids (MRFs) are functional materials, prepared by dispersing magnetic particles in a nonmagnetic carrier fluid, that exhibit a change in mechanical properties (e.g., increase in viscosity and yield stress) when subjected to a magnetic field. Change in mechanical properties is demonstrated by a fast (i.e., fraction of milliseconds) and reversible transition from a liquid‐ to a solid‐like state. This transition, due to a structural reorganization of magnetic particles in the carrier fluid, makes MRFs a valuable material for damping, breaking systems, medical and prosthetics, and robotics. Since the discovery of MRFs in 1948, developing MRF preparation methods that result in improved performance and the storage without oxidation and settling is paramount. This article presents a review on recent developments in the preparation process of MRFs with a special emphasis on the state of the art in additives and coatings used in enhancing MRF chemical, colloidal, and thermal stability. Recent advances in MRF materials and formulations that have increased yield stress and magnetic properties are discussed. Finally, this review analyses the present‐day challenges in MRF research and makes suggestions for the field to improve MRF stability and performance drawing on previous MRF work and work outside of the fields.

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Section: Mrf With Different Magnetic Dispersed Phasesmentioning

confidence: 99%

Performance and Stability of Magnetorheological Fluids—A Detailed Review of the State of the Art

Thiagarajan

Koh

2021

Adv Eng Mater

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“…When shear rate was increased, the shear stress increased linearly. This phenomenon shows that all MRF samples without a magnetic field tend to behave like Newtonian fluids[16]. However, when a magnetic field was applied, the MRF had a steady shear stress value in each shear rate range and behaved like a Bingham fluid[43].The viscosity of the three CIP-based MRF samples as a function of shear rate at different magnetic flux densities is shown in Figure6.…”

mentioning

confidence: 94%

“…Multiple magnetic materials, such as iron (II, III) oxide (Fe 3 O 4 ) [15,16], calcium iron oxide (CaFe 2 O 4 ) [17], manganese ferrite (MnFe 2 O 4 ) [18], cobalt ferrite (CoFe 2 O 4 ) [19], and magnesium ferrite (MgFe 2 O 4 ) [20], have been studied for use in MRF. However, of these materials, carbonyl iron particles (CIP) draw considerable attention due to their soft magnetic characteristics and high magnetic saturation [21,22].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Sr-CoFe2O4 Nanoparticles with Different Particles Sized as Additives in CIP-Based Magnetorheological Fluid

et al. 2021

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This study investigated the effect of adding strontium (Sr)-doped cobalt ferrite (CoFe2O4) nanoparticles in carbonyl iron particle (CIP)-based magnetorheological fluids (MRFs). Sr-CoFe2O4 nanoparticles were fabricated at different particle sizes using co-precipitation at calcination temperatures of 300 and 400 °C. Field emission scanning electron microscopy (FESEM) was used to evaluate the morphology of the Sr-CoFe2O4 nanoparticles, which were found to be spherical. The average grain sizes were 71–91 nm and 118–157 nm for nanoparticles that had been calcinated at 300 and 400 °C, respectively. As such, higher calcination temperatures were found to produce larger-sized Sr-CoFe2O4 nanoparticles. To investigate the rheological effects that Sr-CoFe2O4 nanoparticles have on CIP-based MRF, three MRF samples were prepared: (1) CIP-based MRF without nanoparticle additives (CIP-based MRF), (2) CIP-based MRF with Sr-CoFe2O4 nanoparticles calcinated at 300 °C (MRF CIP+Sr-CoFe2O4-T300), and (3) CIP-based MRF with Sr-CoFe2O4 nanoparticles calcinated at 400 °C (MRF CIP+Sr-CoFe2O4-T400). The rheological properties of these MRF samples were then observed at room temperature using a rheometer with a parallel plate at a gap of 1 mm. Dispersion stability tests were also performed to determine the sedimentation ratio of the three CIP-based MRF samples.

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“…Improving the shear yield strength of MRF is an important research direction for its application. Although many studies in recent years have shown that special particle morphology can improve the overall performance of MRF (Tong et al, 2017;Xia et al, 2017;Wang et al, 2019;Han et al, 2020), due to the cheap price and high saturation magnetization, CIP is still the mainstay in actual use.…”

Section: Introductionmentioning

confidence: 99%

Improved Magnetorheological Properties by Using Ionic Liquid as Carrier Liquid of Magnetorheological Fluids

Tong

Zhao

et al. 2021

Front. Mater.

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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.

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Facile synthesis of hierarchically structured flower-like Fe3O4 microspheres for high-performance magnetorheological fluids

Cited by 43 publications

References 45 publications

Performance and Stability of Magnetorheological Fluids—A Detailed Review of the State of the Art

Performance and Stability of Magnetorheological Fluids—A Detailed Review of the State of the Art

The Effect of Sr-CoFe2O4 Nanoparticles with Different Particles Sized as Additives in CIP-Based Magnetorheological Fluid

Improved Magnetorheological Properties by Using Ionic Liquid as Carrier Liquid of Magnetorheological Fluids

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