Abstract
The rheological and electrical properties of suspensions of carbon nanotubes in an uncured epoxy resin were investigated by means of shear rheology and impedance spectroscopy. It was found that above an onset CNT weight fraction (0.1 wt%), the steady viscosity increased with CNT loading and presented a shear thinning behaviour. The concentration dependence of viscosity changed from a power law to an exponential with increasing shear rate, indicating a loss of interaction between aggregates and CNT network breakage. The fluid-to-solidlike and insulator-to-conductor transitions occurred in the same CNT weight fraction range between 0.5 and 0.6 wt %. The correspondence of these transitions was explained by the reduction of contact resistance between CNT by stiffening of the CNT network leading to improved electronic transport.
Keywords: Suspensions, carbon nanotubes, rheological properties, impedance spectroscopy, transitions
Related Books
The Art of Nanomaterials
Advanced Materials and Nano Systems: Theory and Experiment - Part 2
Advanced Materials and Nano Systems: Theory and Experiment (Part-1)
Artificial Intelligence for Smart Cities and Villages: Advanced Technologies, Development, and Challenges
SILVER NANOPARTICLES: Synthesis, Functionalization and Applications
3