title: Highly sensitive piezo-resistive graphite nanoplatelet-carbon nanotube hybrids/polydimethylsilicone composites with improved conductive network construction.
abstract: 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 hybrids/polydimethylsilicone (GCHs/PDMS) composites with high piezo-resistive performance. 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 ∼ 10(3) and pressure sensitivity ∼ 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.
authors.affiliation: Laboratoire de Mécanique des Sols, Structures et Matériaux, Ecole Centrale Paris, CNRS UMR8579, PRES UniverSud, Grande Voie des Vignes, 92295 Châtenay-Malabry Cedex, France.
authors.forename: Hang
authors.initials: H
authors.lastname: Zhao
authors.affiliation: Laboratoire de Mécanique des Sols, Structures et Matériaux, Ecole Centrale Paris, CNRS UMR8579, PRES UniverSud, Grande Voie des Vignes, 92295 Châtenay-Malabry Cedex, France.
authors.forename: Jinbo
authors.initials: J
authors.lastname: Bai
mesh_terms: D004553:Electric Conductivity; D005385:Fingers; D006108:Graphite; D006801:Humans; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D011312:Pressure; D012828:Silicones / Q000737:chemistry*; D013997:Time Factors; D014961:X-Ray Diffraction
chemical_list: D037742:Nanotubes, Carbon; D012828:Silicones; D006108:Graphite
keywords: conducting composites; dielectric percolation; piezo-resistive pressure sensor; polydimethylsilicone