Performance and Stability of Magnetorheological Fluids—A Detailed Review of the State of the Art,Advanced Engineering Materials

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Performance and Stability of Magnetorheological Fluids—A Detailed Review of the State of the Art
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2021-03-16 , DOI: 10.1002/adem.202001458
Sandhiya Thiagarajan ₁ , Amanda S. Koh ₁

Affiliation

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.

中文翻译：

磁流变流体的性能和稳定性——最新技术的详细回顾

磁流变流体 (MRF) 是一种功能性材料，通过将磁性粒子分散在非磁性载流体中而制备，当受到磁场时，其机械性能会发生变化（例如，粘度和屈服应力的增加）。机械性能的变化通过从液态到类固态的快速（即几分之一毫秒）和可逆转变来证明。由于载液中磁性粒子的结构重组，这种转变使 MRF 成为阻尼、破坏系统、医疗和假肢以及机器人技术的宝贵材料。自 1948 年发现 MRF 以来，开发 MRF 制备方法以提高性能和无氧化和沉降的储存至关重要。本文综述了 MRF 制备过程的最新进展，特别强调了用于增强 MRF 化学、胶体和热稳定性的添加剂和涂料的最新技术。讨论了增加屈服应力和磁性的 MRF 材料和配方的最新进展。最后，这篇综述分析了当前 MRF 研究中的挑战，并在借鉴以前的 MRF 工作和该领域以外的工作的基础上，对该领域提出建议，以提高 MRF 的稳定性和性能。

更新日期：2021-03-16

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