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Journal of Dispersion Science and Technology Volume 26, 2005 - Issue 6
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Original Articles

Rheological Properties of Silica Particle Suspensions in Mineral Oil

Shukun Chen Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim, Norway
,
Gisle Øye Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim, NorwayCorrespondence[email protected]
&
Johan Sjöblom Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim, Norway
Pages 791-798 | Received 01 Feb 2005, Accepted 12 Mar 2005, Published online: 06 Feb 2007
 
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Abstract

The rheological properties of particles suspended in a non‐polar mineral oil have been investigated as a function of volume fraction of particles, particle size, surface properties and shear rate. Three different types of particles were investigated; glass microspheres, monodisperse silica particles and fumed silica. The suspensions showed shear thinning behavior at higher volume fractions, and the viscosity increased with decreasing particle size. The hydrophobic particles display lass shear thinning effects. The relative viscosity of all the suspensions was well fitted to the Krieger and Dougherty model.

Acknowledgments

Shukun Chen acknowledges JIP 1, an industrial consortium (ABB, AkzoNobel, AkerKvaerner, BP, ChampionTechnologies, ChevronTexaco, Norsk Hydro, Petrobras, Statoil ASA, and TOTAL) at Ugelstad Laboratory for financial support.

Degussa is acknowledged for generously supplying us with the Aerosil samples.

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