Flexible and conductive polyvinyl alcohol/Ti3C2Tx composite film with excellent electromagnetic interference shielding performance

Lightweight composites with flexibility and ideal electromagnetic interference (EMI) shielding performance are required for protecting electronic devices against electromagnetic wave pollution. Herein, binary flexible and conductive polyvinyl alcohol (PVA)/Ti₃C₂Tx composite film with a "brick-and-mortar" structure was prepared using a vacuum filtration self-assembly strategy. By the combination of PVA and Ti₃C₂Tx, the PVA/Ti₃C₂Tx composite films have been successfully obtained, leading to high electrical conductivity (≥12.3 S/cm) and superior EMI shielding efficiency (≥27 dB, 8.2-12.4 GHz). The preparation of PVA/Ti₃C₂Tx film offers a promising approach for designing and fabricating flexible high-performance MXene-based EMI shielding materials, which may be applied in various applications including flexible wearable electronic devices and portable equipment.