| Flexible mechanical sensor has great application potential in wearable electronics,service robots and other new fields because of its shape following and extensibility,so it has become one of the current research hotspots.Carbon based conductive polymer composites meet the requirements of good conformal surface of flexible mechanical sensors,and have been widely used with cost advantages.It is difficult to reveal the physical law of their behavior by using experimental methods to explore the improvement of electrical properties of carbon nanotubes and graphene blend sensors.Only by establishing a numerical model or an analytical model can we accurately explore the relationship between the microscopic parameters of particles and the macroscopic parameters of materials.In this paper,the relationship among geometric synergy,electrical synergy and piezoresistive behavior is studied by establishing the numerical model of percolation threshold,the analytical model of conductivity and the analytical model of piezoresistive effect,which are suitable for conducting polymer composites of ternary system(especially carbon nanotubes / graphene conducting polymer),It is speculated that the electrical enhancement effect in the electrical synergistic effect can coexist with the higher strain sensitivity coefficient in the ternary conductive polymer complex.The research results of this paper provide important theoretical support and research means for further improving the electrical and sensing properties of flexible piezoresistive pressure sensor based on ternary conductive polymer composites. |
PDF Full Text Request