Discontinuous shear thickening in the presence of polymers adsorbed on the surface of calcium carbonate particles / Bossis Georges,Boustingorry Pascal,Grasselli Yan,Meunier Alain,Morini Romain,Zubarev Audrey,Volkova Olga // RHEOLOGICA ACTA. - 2017. - V. 56, l. 5. - P. 415-430.

ISSN/EISSN:

0035-4511 / 1435-1528

Type:

Article

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.

Author keywords:

Discontinuous shear thickening; Superplasticizer; Stick-slip; Calcium carbonate suspension DENSE SUSPENSIONS; WALL SLIP; COLLOIDAL SUSPENSIONS; BROWNIAN SUSPENSIONS; RHEOLOGY; FLOW; DISPERSIONS; DILATANCY; FORCES; STRESSES

DOI:

10.1007/s00397-017-1005-4

Web of Science ID:

ISI:000399884300001

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	MAY
Publisher	SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013 USA
Language	English
EISSN	1435-1528
Keywords-Plus	DENSE SUSPENSIONS; WALL SLIP; COLLOIDAL SUSPENSIONS; BROWNIAN SUSPENSIONS; RHEOLOGY; FLOW; DISPERSIONS; DILATANCY; FORCES; STRESSES
Research-Areas	Mechanics
Web-of-Science-Categories	Mechanics
Author-Email	bossis@unice.fr
Funding-Acknowledgement	Centre National d'Etudes Spatiales CNES
Funding-Text	This work was supported by the Centre National d'Etudes Spatiales CNES. We also thank the center of electronic microscopy, CCMA, of the University of Nice-Sophia Antipolis.
Number-of-Cited-References	55
Usage-Count-Last-180-days	10
Usage-Count-Since-2013	10
Journal-ISO	Rheol. Acta
Doc-Delivery-Number	ES9MX