Rheological properties of magnetic and electro-active nanoparticles in non-polar liquids

• Published in: Journal of materials science Vol. 46; no. 16; pp. 5385 - 5393
• Main Authors: Libor, Z., Wilson, S. A., Zhang, Q.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.08.2011; Springer; Springer Nature B.V
• Subjects: Barium titanates; Characterization and Evaluation of Materials; Classical Mechanics; Crystallography and Scattering Methods; Ferric oxide; Iron compounds; Iron oxides; Liquids; Magnetic properties; Materials Science; Nanofluids; Nanoparticles; Nanostructure; Nickel; Particle size; Polymer Sciences; Rheological properties; Rheology; Shear rate; Shear thinning (liquids); Silicones; Solid Mechanics; Viscosity; Solid Loading; Rheological Behaviour; Base Fluid; Shear Rate; Barium Titanate
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-011-5477-9

The rheological properties of two non-polar liquids [silicone oil or perfluorinated oil (FC70)] containing various types of particles, barium titanate, nickel and iron oxide, were investigated as functions of solid loading, particle size and shear rate. All the particles were synthesised in-house. The viscosities of either silicone oil or FC70 containing different solid loadings (10, 20 and 30 g/L) were measured over the shear rate range of 0.10–10 s −1 . All the nanofluids showed shear-thinning behaviour within this range and the viscosities increased with the increase of concentrations of nanoparticle and with the decrease of particle size. The highest increase of viscosity was found to be caused by nickel particles in silicone oil due to the formation of Ni network.