Concentration dependence of yield stress and dynamic moduli of kaolinite suspensions.

Lin, Yuan; Phan-Thien, Nhan; Lee, Jason Boon Ping; Khoo, Boo Cheong

Lin, Yuan; Phan-Thien, Nhan; Lee, Jason Boon Ping; Khoo, Boo Cheong.

Afiliación

Lin Y; Department of Mechanical Engineering, National University of Singapore, Singapore 117576.
Phan-Thien N; NUS-Keppel Corporate Laboratory, National University of Singapore, Singapore 117576.
Lee JB; Department of Mechanical Engineering, National University of Singapore, Singapore 117576.
Khoo BC; NUS-Keppel Corporate Laboratory, National University of Singapore, Singapore 117576.

Langmuir ; 31(16): 4791-7, 2015 Apr 28.

Article en En | MEDLINE | ID: mdl-25865871

RESUMEN

The concentration dependence of yield stress and dynamic moduli of kaolinite suspensions is studied. Complex electrostatic interactions between kaolinite platelets promote a more liquid-like behavior, with clay particles changing from attractive interactions to a face-face repulsive interaction as the mass fraction of clay particles increases. A yield stress model is developed based on the repulsive interaction between disk-shaped particles, which yields a good prediction of experimental observations when repulsive face-face interaction is dominant. The critical concentration when attractive interaction changes completely to face-face repulsive interaction is estimated from the theory. Four regions are identified in the variation of yield stress as a function of the concentration.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Langmuir Asunto de la revista: QUIMICA Año: 2015 Tipo del documento: Article Pais de publicación: Estados Unidos

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