Multifunctional Ultrathin Recycled PET-Based Membrane for Electromagnetic Interference Shielding, Antibacterial and Thermal Management

With the advent of 5G and the Internet of Things (IoT), there is a high demand for lightweight and flexible electromagnetic interference (EMI) shielding membranes with multifunctional capabilities. However, the rapid advancement of technology has led to environmental deterioration, emphasizing the significance of eco-friendly and sustainable materials for EMI shielding. In this study, a novel environment-friendly EMI shielding membrane with electric thermotherapy function and antibacterial properties is developed. The membrane substrate utilizes recycled polyethylene terephthalate (rPET) and is sequentially coated with synthesized FeCo@C nanoparticles (NPs) and silver nanowires (Ag NWs). The membrane is then dip-coated with PDMS to modify the surface superhydrophobicity. Experimental results affirm that the developed environment-friendly EMI shielding membrane possesses exceptional shielding efficiency (68 dB) and can be effectively utilized for safe and low-voltage thermotherapy (137 C-degrees by 2 V) while exhibiting antibacterial properties.