The Rheology and Microstructure of Dense Bimodal Mixtures of Colloidal Particles With Long-Range, Soft Interactions
Hunt, William John
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https://hdl.handle.net/2142/82442
Description
Title
The Rheology and Microstructure of Dense Bimodal Mixtures of Colloidal Particles With Long-Range, Soft Interactions
Author(s)
Hunt, William John
Issue Date
1997
Doctoral Committee Chair(s)
Zukoski, Charles F.
Department of Study
Chemical Engineering
Discipline
Chemical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Chemistry, Physical
Language
eng
Abstract
The rheology of the mixtures is remarkably similar to the monodisperse suspensions for most applied shear stresses. Yield stresses and the general flow curves for all mixtures studied followed the same scaling on the elastic modulus as the monodisperse suspensions. The mixtures display substantial differences in the shear thickening regime. Catastrophic shear thickening is observed, however, the mixtures shear thicken at much lower reduced shear stresses compared to monodisperse suspensions, sharply diminishing the processing window of these suspensions.
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