Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102143
Title: Discontinuous shear thickening in the presence of polymers adsorbed on the surface of calcium carbonate particles
Authors: Bossis, G.
Boustingorry, P.
Grasselli, Y.
Meunier, A.
Morini, R.
Zubarev, A.
Volkova, O.
Issue Date: 2017
Publisher: Springer Verlag
Citation: Discontinuous shear thickening in the presence of polymers adsorbed on the surface of calcium carbonate particles / G. Bossis, P. Boustingorry, Y. Grasselli, et al. — DOI 10.1007/s00397-017-1005-4 // Rheologica Acta. — 2017. — Vol. 56. — Iss. 5. — P. 415-430.
Abstract: In the presence of dispersant molecules currently used in cement industry and based on polyethylene oxide (PEO), we found a strong discontinuous shear thickening (DST) at high volume fraction in suspensions of calcium carbonate particles. The transition was reversible and the critical shear rate and shear stress for which this instability appears are reported versus the volume fraction of particles. A model of repulsive forces between polymers, taking into account the thickness of the polymer layer and the density of adsorption on the surface of the particles, can explain the differences of critical stresses observed between these three dispersant molecules. In particular, it explains why a small polymer densely adsorbed can be more efficient to repel the transition at higher stress than a larger molecule less densely adsorbed. Above the transition, we find that the suspension presents a special kind of stick-slip instability with even the presence of a negative shear rate under constant applied stress. A model is proposed which well predicts this regime by taking into account both the inertia of the apparatus and the viscoelasticity of the suspension. © 2017, Springer-Verlag Berlin Heidelberg.
Keywords: CALCIUM CARBONATE SUSPENSION
DISCONTINUOUS SHEAR THICKENING
STICK-SLIP
SUPERPLASTICIZER
URI: http://hdl.handle.net/10995/102143
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85015170167
PURE ID: 1815651
ISSN: 354511
DOI: 10.1007/s00397-017-1005-4
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

Files in This Item:
File Description SizeFormat 
2-s2.0-85015170167.pdf1,08 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.