Preparation of magnetorheological fluid with excellent sedimentation stability

Fei, Chen; Li, Haopeng; Han, Mangui; Tian, Zhen; Li, Aimin

doi:10.1080/10426914.2020.1765250

Cited by 48 publications

(20 citation statements)

References 19 publications

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“…Surfactants, as a means of improving dispersion stability in general, are another common target for improving MRF stability. Based on previously observed sedimentation ratios, Fei et al [ 117 ] used a blend of anionic surfactants, nonionic surfactants, and a thixotropic agent (fumed silica) for orthogonal analysis of MRF stability. It was observed that the thixotropic agent had the greatest influence on sedimentation rate, whereas the optimum formulation was able to achieve a sedimentation ratio of 1.61% after 1 week and an off‐state viscosity of 1.09 Pa s. Jinaga and Jagadeesha [ 118 ] studied the effect of the nonionic surfactant Triton‐X (TX) and reported a sedimentation ratio of roughly 0.9 at 7 days, suggesting that the effect of TX on stability was negligible compared with the volume fraction of CI.…”

Section: With Additives‐based Mrfsmentioning

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: With Additives‐based Mrfsmentioning

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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“…Today, high purity (99%) iron powder (also known as carbonyl iron) is the most widely used material in this subject [5,34,35,80,149]. In practice, the properties of carbonyl iron are impressive compare to others.…”

Section: The Dispersed Particlesmentioning

confidence: 99%

A Brief Review of Preparation Method and Challenges of Magnetorheological Fluids

Unuh¹,

Muhamad²

2020

ARMS

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In recent years, there has been an increased interest in the application of smart material technologies. The primary features of smart materials are the ability to provide multifunctional behaviour. Among smart materials technologies, magnetorheological fluids (MRFs) have been efficiently utilised in a variety of applications, especially in mechanical vibration engineering. In this paper, a brief review of past studies on the preparation methods, MRFs contents that contribute to the performance of MRFs as a smart material is conducted. The effect of particle size, shapes and also volume concentration is also discussed. This papers concludes with discussion on some current challenges and future prospect of MRFs.

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“…Magnetic liquids (MLs) [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 ], magnetorheological suspensions (MRSs) [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ] and magnetorheological elastomers (MREs) [ 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ] are characterized by the fact that they possess a magnetizable phase (ferri-ferromagnetic particles) and additives (fibers of natural and/or artificial polymers, nanotubes, graphene nanopallets, etc.) undissolved in the base matrix, which can be either liquid in the case of MLs and MRSs or typically a silicone rubber in the case of MREs.…”

Section: Introductionmentioning

confidence: 99%

“…When applying a magnetic field, the thermodynamic and transport characteristics of MACs change drastically, a useful property in medical diagnoses and therapies [ 4 , 5 , 6 , 7 , 8 , 9 ], vibration dampers and seismic shocks [ 20 , 43 ], medical devices [ 21 , 22 , 24 ], magnetic field sensors and mechanical deformations [ 23 , 25 , 37 , 38 ]. In order to achieve high-performance devices with MACs, the scientific community is preoccupied with improving their physical characteristics by finding new ways of preparation and characterization [ 1 , 2 , 3 , 6 , 7 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 23 , 25 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 39 , 40 , 41 , 42 ]. In these circumstances, we consider that research towards the assembly of MACs, using a magnetizable phase and additives in the form of nano/microparticles, would generate composite materials with physical characteristics suitable for various applications.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Field Effects Induced in Electrical Devices Based on Cotton Fiber Composites, Carbonyl Iron Microparticles and Barium Titanate Nanoparticles

2022

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This work consists in the process of preparing magnetic active composite materials based on cotton fibers, iron carbonyl microparticles and barium titanate nanoparticles, and the electrical devices manufactured with them. For different compositions of the aforementioned ingredients, three such composites are manufactured and compacted at constant pressure between two electrodes. In the absence and in the presence of a magnetic field, using an RLC bridge, magnetocapacitive, magnetoresistive and magnetopiezoelectric effects are highlighted in the custom fabricated devices. It is shown that these effects are significantly influenced by the composition of the materials. Based on the model elaborated in this paper, the mechanisms that contribute to the observed effects are described and the theoretical predictions are shown to agree with the experimental data. The obtained results can be used in the assembly of hybrid magnetic active composites, which are low cost, ecological and have other useful physical characteristics for applications.

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Preparation of magnetorheological fluid with excellent sedimentation stability

Cited by 48 publications

References 19 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

A Brief Review of Preparation Method and Challenges of Magnetorheological Fluids

Magnetic Field Effects Induced in Electrical Devices Based on Cotton Fiber Composites, Carbonyl Iron Microparticles and Barium Titanate Nanoparticles

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