Piezoresistive Elastomer Composites Used for Pressure Sensing

Pressure sensors with capability to detect small physical movements and mechanical deformations have been widely used in wearable medical applications. However, devices that are commercially available currently require complex designs fabrication present only a limited force-range sensitivity. To simplify the design, thermoplastic polyurethane (TPU)/ carbon nanotubes (CNTs) composite film has developed using melt extrusion technique followed by compression moulding. were made from these films, whose piezoresistive response analysed as function of concentrations CNTs, around percolation threshold. The changes voltage device applied pressure was continuously measured divider system coupled an electromechanical test machine dynamically loaded under compression. tuned obtain best sensitivity signal/noise (S/N) ratio for each tested. results showed containing target 2.5 wt.% CNTs had market leading repeatability during long-term stability testing high durability underwater indicating such can be promising robust sensitive sensor devices.