Cwalina, Colin D.Harrison, Kelsey J.Wagner, Norman J.2018-08-152018-08-15Copyright2016-08-02Cwalina, Colin D., Kelsey J. Harrison, and Norman J. Wagner. "Rheology of cubic particles in a concentrated colloidal dispersion suspending medium." AIChE Journal 63.3 (2017): 1091-1101.1547-5905http://udspace.udel.edu/handle/19716/23673Author's manuscriptThe flow behavior of mixtures of micron‐sized cubic particles suspended in a concentrated colloidal dispersion is investigated across a broad range of cubic particle concentrations. In the semi‐dilute regime, the qualitative shape of the dynamic moduli and flow curves reflect those of the underlying colloidal dispersion medium. These curves are superimposed with the underlying colloidal dispersion using shift factors that are found to be larger than those obtained in a recent study of suspensions of non‐colloidal spherical particles in the same colloidal dispersion medium. At higher concentrations of cubic particles, deviations from this shifting procedure are apparent. Scaling calculations suggest depletion interactions are responsible for the increase in the low shear viscosity and confinement of the underlying colloidal dispersion can be expected to enhance the shear thickening behavior at high shear stresses. The results of this study provide guidance for formulating suspensions through control of particle shape and mixture concentration.en-USArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Article10.1002/aic.15443