Smart-fabric sensor composed of single-walled carbon nanotubes containing binary polymer composites for health monitoring

A smart-fabric sensor for health monitoring has been fabricated using composite of single-walled carbon nanotubes (SWCNTs)-filled binary polymer of poly vinylidene fluoride/poly (3,4-ethylenedioxythiophene)-poly (styrenesulfonate) (PVDF/PEDOT:PSS). The response curves and working principle were investigated, and sensors were fabricated to achieve a highly linear and stable response for a wide range of temperatures (25-100 °C) and bending angles. The sensors show a stable and nearly linear response of impedance change by varying temperatures in the range of 25-100 °C. The impedance of the sensors changed from 5.8 MΩ to 2.95 MΩ for temperature change in the range of 25-100 °C with a sensitivity of 38 kΩ/°C. The bending movement sensitivity of the sensors was found to be 90 kΩ per degree angle, and the response of the sensor was very stable in the range of 0-120°.