Multifunctional Wearable Device Based on an Antibacterial and Hydrophobic Silver Nanoparticles/Ti3C2Tx MXene/Thermoplastic Polyurethane Fibrous Membrane for Electromagnetic Shielding and Strain Sensing

Although flexible wearable devices have received wide attention in various application scenarios, it is still a challenge to integrate multiple functions on a single flexible wearable equipment. Here, an electrospun thermoplastic polyurethane (TPU) fibrous membrane is selected as the flexible substrate, and Ti3C2Tx MXene is modified on the fibrous membrane by ultrasonic coating, followed by the loading of silver nanoparticles (AgNPs) by chemical deposition to successfully prepare a AgNPs/Ti3C2Tx/TPU fibrous membrane. The electromagnetic interference (EMI) shielding performance of the fibrous membrane is up to 87.31 dB in a microwave frequency range of 8–12 GHz. As a strain sensor, the AgNPs/Ti3C2Tx/TPU fibrous membrane has a strain of 90%, a low detection limit of 0.5%, and a sensitivity up to a gauge factor (GF) of 157. The AgNPs/Ti3C2Tx/TPU fibrous membrane also has antibacterial and hydrophobic properties, showing the potential for application in complex environments.