Rheological performances and enhanced sedimentation stability of mesoporous Fe3O4 nanospheres in magnetorheological fluid

Wang, Guangshuo; Geng, Jiahong; Qi, Xiongwei; Du, Tianxiang; Zeng, Yingzhe; Yu, Rongmin; Yuan, Mingwei; Peng, Hesong; Li, Haibin; Chen, Chao

doi:10.1016/j.molliq.2021.116389

Cited by 21 publications

(15 citation statements)

References 43 publications

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“…Figure 4c shows the relaxation responses of the MRFs with time at different magnetic field strengths when the magnetic field was switched between on and off states. [ 37 ] When a magnetic field was applied to the MRFs, the shear stress instantaneously increased without significant hysteresis, indicating the rapid formation of solid chain‐like structures in the MRFs. When the magnetic field was switched off, the shear stress immediately reduced to its initial value because of the instantaneous collapse of the chain structure, which reverted to a disordered state without the magnetic field.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Magnetorheological Behavior of a Carbonyl‐Iron‐Based Fluid via Addition of Fe₃O₄/Halloysite‐Nanotube Composite Particles

Zhang

Yang

et al. 2022

Physica Status Solidi (a)

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Composite additives for enhancing the yield stress, sedimentation stability, and long-term reversibility of bidisperse magnetorheological fluids (MRFs) are reported herein. The design and introduction of magnetic Fe 3 O 4 /halloysitenanotube (HNT) composite additives to carbonyl-iron (CI)-based MRFs are described, and the effects of Fe 3 O 4 /HNT addition on the MRF behavior are elucidated. The rheological, viscoelastic, and cyclic reversibility analyses of the bidisperse Fe 3 O 4 /HNT-CI MRFs indicate that the MR performance increases and subsequently decreases with the increasing content of the Fe 3 O 4 /HNTs. The MRF containing 1.0 wt% Fe 3 O 4 /HNTs shows optimal MR properties and longterm reversibility. Under a magnetic field, the 1.0 wt% Fe 3 O 4 /HNTs are embedded in the interstices of the magnetic chains, enhancing the magnetic dipole-dipole interactions between the particles, strengthening the rigidity of the magnetic chains, and increasing the yield stress of the MRF. The Fe 3 O 4 /HNTs are adsorbed on the surfaces of the CI particles in the absence of a magnetic field, occupying the free space between the CI particles and forming support structures, which prevents aggregation and improves sedimentation stability. Moreover, the designed MRFs respond quickly to magnetic field switching and exhibit enhanced long-term reversibility.

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Section: Resultsmentioning

confidence: 99%

Enhanced Magnetorheological Behavior of a Carbonyl‐Iron‐Based Fluid via Addition of Fe₃O₄/Halloysite‐Nanotube Composite Particles

Zhang

Yang

et al. 2022

Physica Status Solidi (a)

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“…13,14 The fluid's poor stability due to sedimentation increases the response time of MR fluids, thereby diminishing their application value. 15 Even though researchers have made significant headway on MR fluids research in the mechanical engineering fields, enhancing the fluid's mechanical properties and improving their sedimentation stability are still key issues to study. To face this challenge, many insightful strategies have been applied to MR fluids research, such as using low-density and specially shaped magnetic particles, 16−18 modifying magnetic particles with surfactants, 19,20 and preparing core−shell magnetic particles.…”

Section: Introductionmentioning

confidence: 99%

“…However, the density of magnetic particles in these fluids is much higher than that of the carrier liquids. This large difference in density results in severe sedimentation problems. , The fluid’s poor stability due to sedimentation increases the response time of MR fluids, thereby diminishing their application value …”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulations and Experimental Studies of the Microstructure and Mechanical Properties of a Silicone Oil/Functionalized Ionic Liquid-Based Magnetorheological Fluid

Zhao

Tong

et al. 2022

ACS Appl. Mater. Interfaces

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Magnetorheological (MR) fluids are smart materials that show enormous potential in vibration control, mechanical engineering, etc. However, the effects of the solid–liquid interface strength and the interaction strength between carrier liquid molecules on the mechanical properties and sedimentation stability of MR fluids have always been unresolved issues. This work presents a new type of MR fluid that has a novel carrier liquid, i.e., silicone oil (SO) mixed with a hydroxyl-functionalized ionic liquid (IL-OH). An all-atomic Fe/SO/IL-OH interface model for studying the relationship between mechanical properties and interface strength and intermolecular interactions is established. On the basis of simulation results and theoretical analyses, the mechanical properties and sedimentation stability of the SO/IL-OH-based MR fluids are thoroughly investigated by experiments. The results show that functional ionic liquids significantly improve the mechanical properties and sedimentation stability of MR fluids. These results are essentially attributed to the stronger solid–liquid interface strength, van der Waals forces, and hydrogen bonds between the silicone oil and the functional ionic liquid. The explicit results not only help elucidate the numerous phenomena involved in the research process for MR fluids at the atomic scale but also provide insightful information on the fabrication of high-performance MR fluids.

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“…Magnetorheological polishing is based on the special rheological characteristics of magnetorheological fluids. Polishing abrasive grains (such as diamond, alumina, and ceria) are added into the magnetorheological fluids to prepare a magnetorheological polishing fluid [27][28][29][30][31][32], and the polishing fluid quickly changes from fluid to viscoelastic solid under the influence of a magnetic field in millisecond time. Its yield shear stress rapidly increases to form a polishing ribbon or polishing pad to polish the workpiece surface.…”

Section: Introductionmentioning

confidence: 99%

Evolution of material removal in the magnetorheological polishing of Ti6Al4V by laser power bed fusion

Bao

Chen

et al. 2022

Mechanics & Industry

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This study aimed to obtain super smooth surface medical implant laser power bed fusion Ti6Al4V samples. A self-modified magnetorheological polishing device and polishing fluid were used to polish the laser power bed fusion additive shaped Ti6Al4V samples to study the effect of the main factors such as abrasive grain size, polishing pressure, and polishing time on the surface roughness and material-removal efficiency of the samples. With continuously decreased Al2O3 abrasive-particle size, the surface roughness initially increased and then decreased, and the material-removal rate decreased. The polishing result of 5 µm Al2O3 was better, no new scratch damage was found after 3 µm Al2O3 polishing; With increased polishing pressure from 5 N to 25 N, the deeper the abrasive particles were pressed, the greater the cutting effect and the more obvious the scratches. Surface roughness initially decreased and then increased, and the material-removal rate increased from 1.19 nm/min to 8.68 nm/min. With continuously extended polishing time, the grinding and polishing effect continued to accumulate, and the surface quality significantly improved, decreasing from 366.33 nm to 19.77 nm. These results showed that magnetorheological polishing technology was very effective in removing LPBF forming defects; the surface roughness was reduced by 96.27% and the additive defects can be completely removed.

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Rheological performances and enhanced sedimentation stability of mesoporous Fe3O4 nanospheres in magnetorheological fluid

Cited by 21 publications

References 43 publications

Enhanced Magnetorheological Behavior of a Carbonyl‐Iron‐Based Fluid via Addition of Fe₃O₄/Halloysite‐Nanotube Composite Particles

Enhanced Magnetorheological Behavior of a Carbonyl‐Iron‐Based Fluid via Addition of Fe₃O₄/Halloysite‐Nanotube Composite Particles

Molecular Dynamics Simulations and Experimental Studies of the Microstructure and Mechanical Properties of a Silicone Oil/Functionalized Ionic Liquid-Based Magnetorheological Fluid

Evolution of material removal in the magnetorheological polishing of Ti6Al4V by laser power bed fusion

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Rheological performances and enhanced sedimentation stability of mesoporous Fe3O4 nanospheres in magnetorheological fluid

Cited by 21 publications

References 43 publications

Enhanced Magnetorheological Behavior of a Carbonyl‐Iron‐Based Fluid via Addition of Fe3O4/Halloysite‐Nanotube Composite Particles

Enhanced Magnetorheological Behavior of a Carbonyl‐Iron‐Based Fluid via Addition of Fe3O4/Halloysite‐Nanotube Composite Particles

Molecular Dynamics Simulations and Experimental Studies of the Microstructure and Mechanical Properties of a Silicone Oil/Functionalized Ionic Liquid-Based Magnetorheological Fluid

Evolution of material removal in the magnetorheological polishing of Ti6Al4V by laser power bed fusion

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Enhanced Magnetorheological Behavior of a Carbonyl‐Iron‐Based Fluid via Addition of Fe₃O₄/Halloysite‐Nanotube Composite Particles

Enhanced Magnetorheological Behavior of a Carbonyl‐Iron‐Based Fluid via Addition of Fe₃O₄/Halloysite‐Nanotube Composite Particles