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Updated: May 25, 2026

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
Published on: May 20, 2014
Modeling the viscosity and aggregation of suspensions of highly anisotropic nanoparticles
A Puisto1, X Illa, M Mohtaschemi
1Aalto University, School of Science, Department of Applied Physics, P.O. Box 14100, FI-00076 Aalto, Finland. Antti.Puisto@aalto.fi
Abstract:
The rheology of nanofiber suspensions is studied solving numerically the Population Balance Equations (PBE). To account for the anisotropic nature of nanofibers, a relation is proposed for their hydrodynamic volume. The suspension viscosity is calculated using the computed aggregate size distributions together with the Krieger-Dougherty constitutive equation. The model is fitted to experimental flow curves for Carbon NanoFibers (CNF) and for NanoFibrillated Cellulose (NFC), giving a first estimation of the microscopic anisotropy parameter, and yielding information on the structural properties and rheology of each system.
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