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 Title: Rheology and Microstructure of Concentrated Suspensions of Plate-Shaped Colloidal Particles Author(s): Jogun, Suzanne Michelle Doctoral Committee Chair(s): Zukoski, Charles F. Department / Program: Chemical Engineering Discipline: Chemical Engineering Degree Granting Institution: University of Illinois at Urbana-Champaign Degree: Ph.D. Genre: Dissertation Subject(s): Engineering, Chemical Abstract: The second type of clay particles have a smaller aspect ratio approximately equal to 8. These suspensions demonstrate shear thickening at $\phi \ge$ 0.50 and also have a shear history dependent elastic modulus, G$\sp\prime.$ In the shear thinning region G$\sp\prime$ decreases with increasing shear rate. In the shear thickening region the modulus increases rapidly. Since G$\sp\prime$ is related to particle alignment, these results imply that the particle alignment increases until thickening occurs. At that point the particles become highly misaligned. These alignment changes are confirmed by conductivity measurements. Issue Date: 1998 Type: Text Language: English Description: 91 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1998. URI: http://hdl.handle.net/2142/82448 Other Identifier(s): (MiAaPQ)AAI9834695 Date Available in IDEALS: 2015-09-25 Date Deposited: 1998
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