气体-应变双模态柔性应变传感器的制备及其应用OA

This study presents a novel dual-modal flexible sensor that employs an optical-electrical signal decoupling strategy to achieve strain and gas detection,thereby overcoming the limitations of conventional single-modal flexible sensors.The device is constructed using a wrapped-yarn structure,in which polystyrene-butadiene-styrene(SBS)conductive fibers modified with dopamine hydrochloride and polypyrrole(SBS/PDA/PPy)function as the core strain-sensing component,wrapped with tetraphenylethylene-doped thermoplastic polyurethane(TPE-TPU)fibers serve as the gas-responsive component.Experimental results demonstrate that,for gas sensing,the sensor achieves a low detection limit of 59.4 mL/m3 for tetrahydrofuran(THF),along with a fluorescence quenching efficiency of 78.3％and excellent reversibility and stability.For strain sensing,the device exhibits a broad detection range of 0％-60％,a high gauge factor of 30.455,a rapid response time of 167 ms,and remarkable cycling durability exceeding 1000 cycles.Wearable tests further validate its reliable performance in monitoring human joint motion and respiratory activity.Overall,this work provides a robust strategy for developing multifunctional flexible sensors and demonstrates significant potential for applications in human behavior monitoring and early warning of volatile organic compound gas concentrations in high-risk environments.