Study of reological properties of ferrofluid

Asnaashari Eivari, Hossein (2018) Study of reological properties of ferrofluid. Technical Report. University of Zabol.

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Introduction Colloidal dispersions of nanomagnetic particles in a passive liquid matrix are known as ferrofluids or FF. Magnetic drug targeting (MDT) and magnetic cell separation (MCS) sealing application and magnetic fluid separation technique in diamond mining are the current applications of FF. Iron oxide (usually magnetite and maghemite) nanoparticles are mostly used as magnetic particles in ferrofluids due to their high saturation magnetization and high magnetic susceptibility. The stability of the colloid can be achieved through competitions between attractions due to magnetic and Van der Waals forces which naturally exist between nanoparticles and repulsive interactions in the system. The latter can be controlled by steric repulsion (surfactant-coated FFs and polymer-coated FFs), electrostatic repulsion (ionic FFs), or combination of these mechanisms (double-layer surfactant-coated FFs). The zero field viscosity of a suspension of magnetic particles, η0, is mainly determined by the viscosity of the carrier liquid ηc and the total volume concentration of suspended material C. For a ferrofluid C accounts at least for the particles including their surfactant layer, so for a given fraction of magnetic material in the suspension the viscosity of ion stable ferrofluid is very different to the viscosity of surfactant stable ferrofluid.In this work iron oxide nanoparticles have ben synthesized and their physical properties have been studied. A ionic ferrofluid, have been fabricated using this nanoparticles and its properties have been studied.

Item Type: Monograph (Technical Report)
Subjects: Q Science > QC Physics
Depositing User: Mrs najmeh khajeh
Date Deposited: 30 Nov 2021 04:22
Last Modified: 30 Nov 2021 04:22

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