The Influence of Low Molecular Weight Polymer on the Rheological Behavior of Bentonite Suspensions |
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| Authors: | M Gareche N Zeraibi A Allal M Amoura |
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| Affiliation: | 1. FHC, Laboratory of Physical Engineering of Hydrocarbons , Université Boumerdès , Algiers , Algeria;2. IPREM-EPCP, University of Pau and Pays de l'Adour , Helioparc , Pau , France;3. Laboratory of Energy, Faculty of Physics , University Houari Boumediene , Bab-Ezzouar , Algeria |
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| Abstract: | Abstract The authors showed the influence of the polyethylene oxide (PEO) of molecular weight 6 × 103 g/mol. on the rheological properties of the bentonite suspension (6%). The PEO presents an affinity for the bentonite particles and gradually coated the clay particles, slowing down their kinetic aggregation. The reduction of particle-particle interaction took place until steady values of the yield stress. The stability of the suspension was enhanced with increasing polymer adsorption. The Herschel-Bulkley model is used for the correlation of our experimental results. The analysis by X-ray diffraction also allowed understanding the rheological behavior of the bentonite-PEO mixture. Indeed, the PEO can adopt diverse possible mechanisms: adsorption on the surface of particles, intercalation between the platelets of clay or favoring flocculation by forming bridges between particles. |
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| Keywords: | bentonite non-Newtonian fluids polyethylene oxide rheology suspension |
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