Preparation of Flexible Wearable Temperature Sensors Using Electrofluidic Jet Printing Manufacturing Technology and Composite Material PEDOT:PSS/PANI/PDMS

In this study, high-performance flexible wearable temperature sensors are developed based on innovative material system design combined with electrofluidic jet printing fabrication technology. In terms of core material innovation, the PEDOT:PSS/PANI/PDMS multiresponsive thermosensitive material system was constructed through a molecular-level synergistic composite strategy, and the synergistic effect between the conductive network, temperature response, and mechanical flexibility is far superior to that of the traditional single-component-sensitive materials. In addition, electrohydrodynamic jet printing (EHD printing) is only used as a precision manufacturing platform to realize the precise deposition of microstructured electrodes, and the microstructural integration of copper paste electrodes and composite-sensitive materials on 0.025 mm PET substrate, which is advantageous in precisely controlling the deposition morphology of functional materials. The optimized sensor shows breakthrough performance indexes: −0.867% °C⁻¹ resistance temperature coefficient and 0.997 linearity over a wide range of 25– $80~^{\circ }$ C, 0.19 s ultra-fast response combined with $0.1~^{\circ }$ C high resolution, and the performance parameters are significantly better than those of similar flexible sensors. This study opens up a new path of flexible sensing through material system innovation, providing innovative solutions for smart electronic skin and precision medical monitoring.