Amino Termination of Ti₃C₂ MXene Induces its Graphene Hybridized Film with Enhanced Ordered Nanostructure and Excellent Multiperformance

Abstract

Abstract The strategy of nacre‐inspired structures or the introduction of polymers can only strengthen and toughen 2D inorganic nanosheets‐based flexible films while mitigating their other properties. Herein, based on bending rigidity discrepancy of reduced graphene oxides (rGO) and Ti 3 C 2 nanosheets, the introduction of amino termination on Ti 3 C 2 (Ti 3 C 2 ‐NH 2 ) endows 3rGO/7Ti 3 C 2 ‐NH 2 films with enhanced ordered nanostructure and excellent multiperformance. Its interlayer‐ordered nanostructures are consistently confirmed by both wide‐angle X‐ray scattering and polarized Raman spectroscopy. The tensile strength and fracture energy increase by 84.7% and 156.3% compared with those of traditional 3rGO/7Ti 3 C 2 film, respectively. The higher remained stress (81%) after relaxation agrees well with its better nanosheet orientation. The average fatigue cycles to failure approach 16 951 times under 150 MPa maximum tensile loading. Due to a large decrease in the interface thermal resistance, its thermal conductivity approaches ≈ 48.9 W m −1 K −1 . The results also show that the absorbance of Ti 3 C 2 ‐NH 2 based films greatly surpass the maximum of the components in both X‐band frequency and middle infrared range. Particularly, 3rGO/7Ti 3 C 2 ‐NH 2 films exhibit anomalously high absorbance in the middle infrared range (55% for 22 µm thickness). It suggests that this film has good promise as flexible electronic devices with excellent mechanical, EMI shielding, heat dissipation, and thermal accumulation monitoring capabilities.