Multifunctional and flexible CNTs@MXene/cellulose films for wearable personal thermal management

Abstract MXene‐based high‐performance electronic films possess multifunctional capabilities, particularly in personal physical therapy and health management, thereby positioning them as optimal components for integrated intelligent wearable electronic devices. In this study, we establish a conductive network by harnessing the synergistic effects of one‐dimensional carbon nanotubes (CNTs) and two‐dimensional MXene. We fabricate a multifunctional flexible CNTs@MXene/Cellulose Films (CM/CFs) employing a dip‐coating method, resulting in an interconnected conductive network. The combined effects of the 2D MXene and 1D CNTs endow the resulting films with remarkable electrothermal and photothermal conversion capabilities. Under an external voltage of 1.5 V, the surface temperature of the film reaches to 51.5°C, whereas exposure to one sun yields a surface temperature of 63.1°C. When both the external voltage is sustained at 1.5 V and the light intensity is maintained at one sun, the film's surface temperature attains an impressive 83.6°C, attributable to the photoelectric synergistic effect. This research establishes a theoretical foundation for the advancement of high‐performance multifunctional thin films and provides technical support for the design of highly integrated multifunctional devices within the electronic domain in the future. Highlights An interconnected conductive network of CNTs and MXene has been constructed. The film exhibits excellent thermal performances. This work offers a feasible avenue to fabricate multifunctional fabrics.