Effect of pH on the rheological behavior of pure and interstratified smectite clays
Laribi, Saqussen (Institut National de la Recherche Scientifique et Technique)
Fleureau, Jean Marie (Ecole Centrale Paris. Laboratoire de Mécanique. CNRS UMR 8579)
Grossiord, Jean Louis (Université Paris Sud. Laboratoire de Physique Pharmaceutique. Faculté de Pharmacie)
Kbir-Ariguib, Nejia (Institut National de la Recherche Scientifique et Technique)

Data:	2006
Resum:	The effects of pH and ionic strength on the rheological behavior of aqueous suspensions of both crude and purified Wyoming bentonite and natural interstratified illite-smectite from Tunisia were investigated. Flow tests were performed on the four clay suspensions at a 10% clay concentration at different pH values. They showed that the rheological properties were highly sensitive to pH and the nature of the clay. The evolution of the yield stress as a function of pH is characterized by the presence of maxima and minima attributed to changes in the mode of association of the particles. The effect of pH on the behavior of clay suspended in NaCl solutions was also studied. The results show that the presence of NaCl has very little effect on the pH and yield stress values of the four materials.
Drets:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Aqueous Clay Suspensions ; Flow Properties ; Ionic Strength ; PH ; Yield Stress
Publicat a:	Clays and Clay Minerals, Vol. 54, Núm. 1 (2006) , p. 29-37, ISSN 1552-8367

DOI: 10.1346/CCMN.2006.0540104

9 p, 1.5 MB  Accés restringit a la UAB

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