Production and Properties of Highly Concentrated CNT Dispersions

Procedures for the production of highly concentrated carbon nanotube (CNT) dispersions were evaluated and developed. In this context, the effect of the dispersion agent was determined. Polyvinyl pyrrolidone, lignin sulfonic acid and polystyrene sulfonic acid have shown the best dispersion properties. The dispersion agents strongly influence the conductivity as well as the viscosity. The dispersions can be used as base systems for formulating screen printing pastes or inkjet printing inks showing very good performance in industrial applications.