Effect of Magnetic Nanoparticle Additive on Characteristics of Magnetorheological Fluid

Abstract

Magnetorheological (MR) fluids, suspension of magnetic pure carbonyl iron (CI) in non magnetic carrier, were prepared with and without magnetic CI nanoparticle additive in this study. Initially, the magnetic CI nanoparticle additive was synthesized in a rather simple process of decomposition of penta carbonyl iron (Fe(CO) 5 ) using oleyl amine and kerosene. Magnetic property and morphology of the synthesized magnetic CI nanoparticles were confirmed via vibration sample magnetometer (VSM) and transmission electron microscopy (TEM), respectively. MR fluids, prepared as a mixture of pure CI and CI nanoparticle additive of different weight ratio in carrier fluid, was investigated under different external magnetic field strengths via a rotational rheometer. Sedimentation of the MR fluid was characterized by an optical analyzer, Turbiscan. Their flow behaviors at a steady shear mode were examined with and without magnetic CI nanoparticle additive under magnetic field strength. The MR fluids with magnetic CI nanoparticles added demonstrated slightly higher yield behaviors, suggesting that pure CI and CI nanoparticle additive were being oriented in the magnetic field direction under an applied magnetic field and with much strengthened structure.Index Terms-Additive, carbonyl iron, magnetorheological fluid, nanoparticle.

The Effect of Particle Shapes on the Field-Dependent Rheological Properties of Magnetorheological Greases

“…It has been demonstrated from these works that MRGs can produce very high yield stress without any sedimentation behaviour. In addition, it has been shown that the field-dependent rheological properties of MRGs can be enhanced by adding certain additives, such as nanosized carbon [31]. Besides works on the field-dependent properties, the controllability of the initial viscosity of MRGs by addition of small amounts (5 wt%) of kerosene has been examined [32].…”

Graphene oxide added carbonyl iron microsphere system and its magnetorheology under applied magnetic fields

“…21 The shear stress increases with the higher magnetic field strength as a typical feature of the MR fluid with the formation of robust chain structure. 22 The GO/CI mixture fluid shows similar, even a little higher, shear stress at the same magnetic field compared with CI fluid which may be due to the magnetic response of GO additives. 23 We can, however, make sure that the addition of GO did not affect the MR properties of CI particles.…”

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

“…To increase the stability of MRF also the following thixotropic agents can be added to the MR suspension (de Vicente et al, 2003; Kang et al, 2015): ferrous oleate, lithium stearate, Aerosil 200, Arsil 1 100 (Xu et al, 2018), ferrous naphthalate or ferrous oleate, fumed silica (Aruna et al, 2021), wormlike surfactant micelles (Wu et al, 2006), polystyrene (Dorosti et al, 2020; Kumbhar and Patil, 2014; Quan et al, 2014), microcrystalline cellulose (Chuah et al, 2015), nanowires (Pu and Jiang, 2005), silica nanoparticles (Bae et al, 2017) fullerene powder, carbon nanotubes, graphene nanoplatelets, and others (Cvek et al, 2018). Another way to enhance MRFs stability is applied as a media poly(vinyl pyrrolidone) and carbon nanotubes (Ngatu et al, 2008), ionic liquids (Pu and Jiang, 2005) compounds like aluminum stearate (López-López et al, 2005) tetramethylammonium hydroxide (Fonseca et al, 2016), soy lecithin (Kolekar et al, 2019), N-glucose ethylenediamine triacetic acid (GED3A) stearate and oleate (Chin et al, 2001; Kolekar et al, 2019), emulsifiers like Tween-60, Span-60, OP emulsifier, Tween-80, and Span-80 (Zhang et al, 2009), n-tetradecyltri-ethoxysilane, diethyl-n-octyl-, and n-tetradecylphos-phonates (Belyavskii et al, 2006), oleylamine (Fei et al, 2020; Lu et al, 2016; Song et al, 2009), hydrophilic carbon shell (Lu et al, 2016).…”