Viscosity of Fe₂O₃ nanoparticles dispersion in water and ethylene glycol-water mixture (nanofluids)
by S. Manikandan; N. Karthikeyan; K.S. Rajan
International Journal of Nanoparticles (IJNP), Vol. 6, No. 1, 2013

Abstract: In this paper, the use of stirred bead milling, as a top-down method for preparation of Fe₂O₃-water and Fe₂O₃-ethylene glycol-water nanofluids is reported. Phase transition from crystalline to amorphous, increased surface area and increased pore volume were observed as a result of high-energy stirred bead milling. Nanofluids were found to be stable despite the absence of any surfactant or other additives. The effect of nanoparticles concentration (< 2.06 wt%) and temperature (34-55°C) on nanofluids' viscosity has been reported. Relative viscosities of nanofluids showed linear increase with nanoparticles concentration, though independent of temperature. This is the first work wherein the preparation of Fe₂O₃-based nanofluids by stirred bead milling and their rheological characterisation are reported.

Online publication date: Mon, 31-Mar-2014

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