Shear-thinning behaviour of dense, stabilised suspensions of plate-like particles. Proposed structural model.
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Other documents of the author: José Luis, Amorós Albaro; Blasco Roca, Encarna; Beltrán Porcar, Vicente
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Title
Shear-thinning behaviour of dense, stabilised suspensions of plate-like particles. Proposed structural model.Date
2015-09xmlui.dri2xhtml.METS-1.0.item-edition
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ElsevierBibliographic citation
AMORÓS ALBARO, José Luis; BLASCO ROCA, Encarna; BELTRÁN PORCAR, Vicente. Shear-thinning behaviour of dense, stabilised suspensions of plate-like particles. Proposed structural model. Applied Clay Science (2015), v. 114, pp. 297-302Type
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http://www.sciencedirect.com/science/article/pii/S0169131715002239?np=yVersion
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Abstract
A structural model was developed to describe the shear-thinning behaviour of dense, stabilised suspensions of plate-like particles. The model is based on the following main assumptions: the particles are distributed ... [+]
A structural model was developed to describe the shear-thinning behaviour of dense, stabilised suspensions of plate-like particles. The model is based on the following main assumptions: the particles are distributed in more or less compact layers, oriented parallel to the flow; the particles are assumed to behave as hard disks, disk thickness being the sum of crystal thickness plus twice the Debye length; when the shear stress increases, the orientation of the plate-like particles in the flow direction also increases, thus increasing layer compactness. In order to test the proposed model, a kaolin was selected and characterised. The kaolin was used to prepare more than 40 aqueous suspensions, modifying the solids volume fraction between ϕ = 0.20 and ϕ = 0.475 and the dispersant (sodium silicate) content between Xs = 0.075 and Xs = 0.225 mg dispersant/m2 solid. The flow curves of all suspensions were determined in the quasi-steady state. The results confirmed the validity of the model to satisfactorily describe the combined effect of ϕ and XS on the flow curves in the shear-thinning range. [-]
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Applied Clay Science (2015), v. 114Rights
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