Highly Sensitive Piezo-Resistive Graphite Nanoplatelet-Carbon Nanotube Hybrids/Polydimethylsilicone Composites with Improved Conductive Network Construction

The constructions of internal conductive network are dependent on microstructures of conductive fillers, determining various electrical performances of composites. Here, we present the advanced graphite nanoplatelet-carbon nanotube hylirids/polydimethylsilicone (GCHs/PDMS) composites with high piezo-resistive petformance. GCH particles were synthesized by the catalyst chemical:Vapor deposition approach. The synthesized GCHs can be well dispersed. in the matrix through the mechanical blending process. Due to the exfoliated GNP and aligned,CNTs coupling structure, the flexible composite shows an ultralow percolation threshold (0.64-,Vol %) and high piezo-resistive sensitivity (gauge factor similar to 10(3) and pressure sensitivity similar to 0.6 kPa(-1)). Slight motions of finger can be detected and distinguished accurately using the composite film as a typical wearable sensor. These results indicate that designing the internal conductive network could be a reasonable strategy to improve the piezo-resistive performance of composites.