Influence of Oleic and Lauric Acid on the Stability of Magnetorheological Fluids

Huang, Yuehua; Jiang, Yulin; Yang, Xiya; Ren-ping, XU

doi:10.4283/jmag.2015.20.3.317

Cited by 9 publications

(2 citation statements)

References 14 publications

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“…The sedimentation rate reduces remarkably as a result of decreased mismatch in the carrier medium and magnetic particle density. Huang et al [21] prepare MR fluids based on micron-sized iron particles diffused into the silicone oil. The oleic acid along with lauric acid has been added to modify the iron particles.…”

Section: Surface Modifications In Mr Fluidsmentioning

confidence: 99%

Magnetorheological fluids: A comprehensive review

Chauhan,

Kumar,

Sham

2024

Manufacturing Rev.

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The magnetorheological (MR) fluids contain magnetic micro-sized iron particles, non-magnetic-based fluid, and some additives in order to mitigate sedimentation and agglomeration. The various carrier fluids used in the preparation of MR fluids are mineral oil, silicon oil, castor oil, soybean oil, kerosene, synthetic oils, honge oil, organic oil, water-based oils, etc. However, for obtaining better vibration control, silicone oil is the most preferred one due to its higher viscosity index, lower friction characteristics, higher flash point, and higher shear strength. The MR fluids have various application areas such as dampers, prosthetic knees, valves, brakes, clutches, finishing processes etc. The dampers containing MR fluids are used in automobile cushioning for enhancing passenger comfort and MR suspensions significantly improve steering stability in vehicles. In case of MR brakes, the braking torque on the rotating disks is controlled using the generated shear stress. The carbonyl iron (CI) particles exhibit better rheological characteristics as compared to electrolytic iron (EI) particles. The use of MR fluids produces stable and natural limb movement in orthoses, lower limb prostheses, and exoskeletons. The MR fluids also prove to be very significant in polishing applications. There are various issues with preparation methods and difficulties in the storage of MR fluids. The problems encountered in the synthesis of MR fluids include sedimentation, agglomeration, in-use thickening, corrosion, erosion, etc. The impact of particle proportion, particle shapes, and size has been influential in evaluating MR characteristics. The viscosity and shear stress of MR fluid have been mitigated at higher values of temperature and even CI particles get oxidized at higher temperatures. The CI particles as compared to EI particles are the majority favourable particles used for dispersing state within the MR fluids due to their higher value of saturation magnetization, more availability, and lesser cost. The small-sized particles led to lower wettability, whereas larger-sized particles accounted for an increased sedimentation rate. The currently available MR fluids cost is still on the higher side and the preparation of economical MR fluid is still a big challenge for the researchers. The MR fluids storage is also a big concern. The future scope of MR fluid may be in heavy industries such as nuclear, shipbuilding, oil and gas, space and aviation, etc. to achieve the desired damping response.

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Section: Surface Modifications In Mr Fluidsmentioning

confidence: 99%

Magnetorheological fluids: A comprehensive review

Chauhan,

Kumar,

Sham

2024

Manufacturing Rev.

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“…The addition of surfactants reduces the interfacial tension at the magnetic particle-liquid medium surface and increases wettability, where the surfactant contains both, the polar and nonpolar groups (Lijesh et al, 2016;Son, 2018;Wu et al, 2016). Besides many compounds as surfactants mainly organic acids are used having carboxyl group but different carbon chain lengths like citric acid, stearic acid (Yagnasri et al, 2021), oleic acid (Charles, 2002;Lo´pez-Lo´pez et al, 2005;Sarkar and Hirani, 2015), palmitic acid (Ashtiani and Hashemabadi, 2015;Fonseca et al, 2016;Rabbani et al, 2015), myristic (Ashtiani and Hashemabadi, 2015;Carlson and Jolly, 2000), and lauric acid (Ashtiani and Hashemabadi, 2015;Bica et al, 2007;Carlson and Jolly, 2000;Huang et al, 2015). Surfactants improve the interfacial activity of magnetic particles and their dispersion.…”

Section: Stabilization and Tribological Propertiesmentioning

confidence: 99%

Magnetorheological fluids: A concise review of composition, physicochemical properties, and models

Osial

Pręgowska

Warczak

et al. 2023

Journal of Intelligent Material Systems and Structures

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Magnetorheological fluids (MRFs) are classified as intelligent materials whose rheological and mechanical properties can be modified by interaction with an external magnetic field. These unique features allow for a controlled change of their viscosity, which is applied in technology to build adaptive devices and effectively suppress vibrations in various mechanical systems. In this paper, we overview and discuss our previous results regarding advances and physicochemical MRF properties in the context of broader literature. We concentrated on such properties as flow, yield strength, and viscoelastic behavior under shearing flows. We briefly discussed continuum and discrete MRFs modeling. Since the magnetic core is mainly based on iron or its compounds, depending on its chemical composition, morphology, stabilizing agents, and the liquid medium’s viscosity, its rheological and micromechanical properties can be moderated. To predict the behavior of such a fluid, it is necessary to propose and implement an appropriate model. Simple models like Bingham can consider the quasi-static and dynamic behavior of the MRFs, while discrete models are applied to the development and implementation of the MRF control algorithms. Thus, analytical and numerical simulation compromise the accuracy, quantity of considered phenomena, and computational cost.

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