Smart and flexible CNTs@MXene heterostructure-decorated cellulose films with excellent electrothermal/photothermal conversion and EMI shielding performances

High-performance electronic films with multifunctional properties for personal therapy and health management are highly desirable for integrated smart wearable electronic devices. By utilizing a double-layer coating strategy and the synergistic effect of heterostructures, a carboxylated carbon [email protected]/cellulose film ([email protected]/CFs) with interconnected conductive network was prepared via a facile dip-coating and spray-coating approach. The Joule heating, photothermal conversion and electromagnetic interference (EMI) shielding performance were realized due to the synergetic effect of MXene and CNTs, delivering an intriguing Joule heating performance (154 °C at an applied voltage of 4 V), an outstanding photothermal conversion efficiency (105 °C at 4 suns) and a remarkable EMI shielding effectiveness of 32.62 dB. This work provides a feasible pathway to fabricate high-performance versatile films and offers insights into the design of highly integrated multifunctional devices for personal medical therapy application in future therapy electronic fields.