Fabrication of Magnetite Nanoparticle-embedded Polystyrene Composites and Their Additive Role on the Dynamic Properties of Carbonyl Iron-based Magneto-rheological Fluids

Abstract

Magnetic Fe 3 O 4 @polystyrene (PS) nanoscale composite particles were fabricated using a unique Shirasu porous-glass membrane technique and used as additives to a magnetorheological (MR) suspension with magnetic carbonyl-iron (CI) particles. The morphology of the fabricated Fe 3 O 4 @PS composites was characterized by transmission electron microscopy. The effects of the Fe 3 O 4 @PS composite particle additive on its MR behavior was examined using a rotation rheometer under an applied magnetic field. The results revealed improved MR behavior, such as higher storage and loss moduli, and elastic yield stress compared to those of the pure CIbased MR suspension under an external magnetic field.

Effects of ZnO nanoparticles on the antifungal performance of Fe3O4/ZnO nanocomposites prepared from natural sand

“…Here, λ is the wavelength of the x-ray source used, θ is the diffraction angle, and β is the full width at half maximum of the peak [23]. The diffraction pattern of the FZ1 sample included the Fe 3 O 4 diffraction peaks at 2θ=30.3°, 35.6°, 43.3°, 53.7°, 57.3°, 62.9°, and 74.2°, representing the Bragg peaks (022), ( 113), (004), ( 224), (115), (044), and (355), respectively [24]. The diffraction peaks for the FZ5 sample were detected at 2θ=31.7°, 34.4°, 36.2°, 47.5°, 56.6°, 62.8°, 66.3°, 67.9°, 69.1°, 72.5°, and 76.9°; representing the ZnO phase with the respective Bragg peaks (100), (002), (101), (102), (110), (103), ( 200), (112), (201), (004), and (022) [25,26].…”

Fabrication of liquid crystal Fe3O4 composites and their magnetorheological properties

“…It has promising applications in mechanical engineering, biomedicine, anticancer materials, magnetic resonance imaging, and drug-releasing agents. [1][2][3][4][5][6] Due to the advantages of magnetic Fe 3 O 4 nanoparticles, such as higher saturation magnetization strength, superparamagnetism, catalytic, conductive, and biocompatible properties, MRFs with different applications are often prepared by using Fe 3 O 4 nanoparticles as the dispersed phase, and nonmagnetic fluids (biocompatible and non-biocompatible fluids such as silicone oils, water, mineral oils, vegetable oils, paraffin waxes, hydrocarbons, and silicone-based fluids) as the carrier fluid. 7,8 Although the density of Fe 3 O 4 is relatively small (e.g., carbonyl iron) among a variety of magnetic materials, it is still mismatched compared to the carrier fluid (e.g., silicone oil).…”

“…MRFs have attracted great interest, and their favorite properties have led to their use in many industrial applications. It has promising applications in mechanical engineering, biomedicine, anticancer materials, magnetic resonance imaging, and drug‐releasing agents 1–6 . Due to the advantages of magnetic Fe 3 O 4 nanoparticles, such as higher saturation magnetization strength, superparamagnetism, catalytic, conductive, and biocompatible properties, MRFs with different applications are often prepared by using Fe 3 O 4 nanoparticles as the dispersed phase, and nonmagnetic fluids (biocompatible and non‐biocompatible fluids such as silicone oils, water, mineral oils, vegetable oils, paraffin waxes, hydrocarbons, and silicone‐based fluids) as the carrier fluid 7,8 .…”