Multifunctional Wearable Conductive Nanofiber Membrane with Antibacterial and Breathable Ability for Superior Sensing, Electromagnetic Interference Shielding, and Thermal Management

Abstract With the rapid development of bioscience and technology, wearable electronic devices are developing toward advanced trends such as flexibility, convenience, multifunctionality, and user‐friendliness. Herein, polystyrene‐block‐poly(ethylene‐co‐butylene)‐block‐polystyrene (SEBS) is employed for assisting the strong binding of silver nanoparticles (AgNPs) with polyimide nanofiber (PIF) to obtain the durable PIAgS conductive nanofiber membrane with antibacterial and hydrophobic ability. Owing to the porous fiber skeleton of nanofiber membrane and good interface adhesion, AgNPs can be homogeneously anchored onto fiber surface to construct stable and perfect 3D conductive network with an ultrahigh conductivity of up to 2102.7 S/m, enabling multifunctionality of the resultant conductive nanofiber membrane with superior bioelectric signal (EMG/ECG) sensing, pressure sensing (S = 1.45 kPa −1 , 100 kPa) for deep learning assisted gesture recognition, electromagnetic interference (EMI) shielding (18757.8 dB·cm 2 ·g −1 ), and electric heating (12.2 °C/V 2 ) performances. Furthermore, as a multifunctional wearable electronic device, the antimicrobial ability of AgNPs and breathability of nanofiber membrane can ensure its sufficient wearing safety and comfort. Importantly, the inherent weathering resistance of PINF and SEBS also endows it with excellent stability and broad service life. Taken together, the designed conductive nanofiber membrane possesses great application potential for next‐generation multifunctional wearable electronic device with excellent stability and wide applicability.