Comparison of the carbon additives on the conductivity, thermomechanical, and corrosion properties for TEOS oligomer modified epoxy-amine coating systems

Four types of carbon filler, carbon black, mixture of carbon black and non-fullerene carbon nanotubes, non-fullerene carbon nanotubes, and purified fullerene carbon nanotubes were compared in a 2-K BPA-Epoxide-Amidoamne. The effect of carbon filler type and loading on the viscosity of coatings as well as mechanical, thermal, electrical, and general coating properties of the cured films were evaluated. General coating properties including pencil hardness, impact resistance, cross-hatch, and pull-off adhesion. Aggregation of carbon fillers at 1.0 wt% resulted in a decrease in film properties. Scanning electron microscope (SEM) was used to observe the surface morphology of a fracture film surface. The storage modulus and crosslink density increased and the maximum tan delta decreased with the increase of filler content. It was found that the most efficient material to enhance the electrical conductivity and anticorrosive properties of nanocomposite coating systems was fullerene CNT.