Mechanically strong and folding?endurance Ti ₃ C ₂ T _<i>x</i> MXene/PBO nanofiber films for efficient electromagnetic interference shielding and thermal management

Electromagnetic interference (EMI) shielding materials with excellent flexibility and mechanical properties outstanding thermal conductivity have become a hot topic of research in functional composites. In this study, the “sol–gel-film conversion technique” is used to assemble polyetherimide-functionalized Ti3C2Tx nanosheets (f-Ti3C2Tx) poly(p-phenylene-2,6-benzobisoxazole) (PBO) nanofibers (PNFs), followed by dialysis vacuum drying prepare f-Ti3C2Tx/PNF films lamellar structures. When loading f-Ti3C2Tx 70 wt%, film presents optimal comprehensive properties, an EMI effectiveness (SE) 35 dB specific SE/thickness ((SSE, SE/density)/t) 8211 cm2/g, tensile strength 125.1 MPa, in-plane coefficient (?) 5.82 W/(m K), electrical 1943 S/m. After repeated folding for 10,000 cycles, SE f-Ti3C2Tx/PNFs still remain 33.4 116.1 respectively. Additionally, also shows stability, flame retardancy, structural stability. This would provide novel method design fabrication multifunctional composite considerably expand applications MXene- PNF-based composites fields management.