On the Dispersion of Carbon Nanofibre-Based Suspensions in Simple Shear: An Experimental Study

Carla Leer; Ferrie W.J. van Hattum; Olga S. Carneiro; Senentxu Lanceros-Méndez

doi:10.4028/www.scientific.net/MSF.587-588.192

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On the Dispersion of Carbon Nanofibre-Based Suspensions in Simple Shear: An Experimental Study
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On the Dispersion of Carbon Nanofibre-Based Suspensions in Simple Shear: An Experimental Study

Abstract:

The effect of different dispersion states on the rheological and AC conductivity properties of carbon nanofibre/epoxy suspensions was investigated. Both rheological and electrical properties revealed to be good indicators of the fillers’ dispersion state, as confirmed by optical microscopy. It was shown that imposing a low shear deformation to poorly dispersed suspensions leads to agglomerate rearrangement resulting in a worse dispersion quality and, consequently, lower electrical conductivity. On the other hand, the imposition of a high shear deformation improves the original dispersion, resulting in better electrical conductivity. Rheological observations confirm the trends observed.