Robust MXene‑Based Electromagnetic Shielding Textiles Integrated Smart Switching and Tri‑Mode Thermal Conversion

To meet the growing need for high-performance textiles in wearable electronics, fiber materials integrating mechanical, electrical, and magnetic functionalities are highly desirable. However, achieving a synergistic combination of mechanical robustness, environmental stability, and controllable performance remains challenging. Here, we report continuously wet-spun composite fibers composed of transition metal carbides/nitrides (MXenes), sodium alginate, and metal-organic framework derivatives. Through the cooperative effects of hydrogen-bonding, ionic, and covalent crosslinking, the fibers exhibit high mechanical strength, flexibility, and structural integrity, together with remarkable hydrophobicity, chemical resistance, and antioxidant capacity. Benefiting from magnetic loss and conductive attenuation mechanisms, the assembled magnetic conductive textile exhibits outstanding electromagnetic interference shielding performance with an ultrahigh shielding effectiveness (SE) of up to 61 dB across the ultrabroadband frequency range of 8.2-12.4 GHz. Notably, by simply altering the weaving orientation, the textile enables a smart and reversible "ON/OFF" electromagnetic interference shielding switch, with the SE tunable between 3.04 and 30.3 dB. Moreover, the textile displays efficient magneto-, electro-, and photo-thermal conversion capabilities, enabling applications in intelligent regulation, antibacterial treatments, surface deicing, and thermal management. This scalable and efficient fabrication strategy provides a versatile material platform for MXene-based textiles in wearable electronics, electromagnetic compatibility, and aerospace fields.