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 nanotubes@MXene/cellulose film (CNTs@MXene/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) shield-ing performance were realized due to the synergetic effect of MXene and CNTs, delivering an intriguing Joule heating performance (154 ? at an applied voltage of 4 V), an outstanding photothermal conversion efficiency (105 ? 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.