title: Modeling the viscosity and aggregation of suspensions of highly anisotropic nanoparticles.
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.
authors.affiliation: Aalto University, School of Science, Department of Applied Physics, P.O. Box 14100, FI-00076 Aalto, Finland. Antti.Puisto@aalto.fi
authors.forename: A
authors.initials: A
authors.lastname: Puisto
authors.forename: X
authors.initials: X
authors.lastname: Illa
authors.forename: M
authors.initials: M
authors.lastname: Mohtaschemi
authors.forename: M J
authors.initials: MJ
authors.lastname: Alava
mesh_terms: D016880:Anisotropy; D002244:Carbon / Q000737:chemistry; D002482:Cellulose / Q000737:chemistry; D003198:Computer Simulation; D057446:Hydrodynamics; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry*; D012212:Rheology; D013535:Suspensions / Q000737:chemistry*; D014783:Viscosity
chemical_list: D013535:Suspensions; D002244:Carbon; D002482:Cellulose