Skin inspired multifunctional crumpled Ti3C2Tx MXene/Tissue composite film

The excellent chemical, mechanical or physical functionalities of two-dimensional nanomaterials can be better performed by assembling two-dimensional nanosheets into crumpled structures. Herein, inspired by the wrinkles on human skin, we demonstrated a simple method to create out-of-plane crumpled surface morphology based on the expanding-shrinking process of tissue. The unique crumpled structure largely raises the fracture strain of Ti3C2Tx MXene/Tissue composite film, which reaches 30.48%, while the tensile strength also shows an increasement to 28.63 MPa. The EMI shielding performance improved by the internal scattering achieves 77.0 dB. With vertically aligned Ti3C2Tx nanosheets formed by the crumples, the through-plane thermal conductivity reached 1.12 W m-1 K-1 is obtained. Moreover, the enhanced photothermal conversion performance caused by the large specific surface area improves the solar-driven water evaporation rate to 1.85 kg m-2h- 1. This work exhibits a novel method for fabricating multifunctional crumpled Ti3C2Tx MXene composite film.