Elastic conductive CNT/Ecoflex nanocomposites for tactile sensing

This study presents fabrication and analysis of carbon nanotube (CNT)/Ecoflex composites with characteristics of balanced conductivity, flexibility and mechanical robustness. We developed uniform composites using a low-viscosity CNT/Ecoflex suspension combined with a solvent evaporation technique. The electrical resistance and strain characteristics of the composites were analyzed, followed by further examination of their stress-strain behaviors. The 8.5 wt.% and 9.1 wt.% composites demonstrated higher elastic properties without compromising their conductivity. Furthermore, our exploration into tactile sensing characteristics revealed that the 2 wt.% CNT/Ecoflex composites responded optimally at a voltage of 20 V. Finally, the 1.5 wt.% CNT/Ecoflex composites were implemented in a hand motion sensor, showcasing its ability to accurately track and differentiate complex hand gestures. This work provides crucial insights into the potential of CNT/Ecoflex composites in fields requiring mechanical strength, flexibility, and consistent conductivity.