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MXene (Ti3C2Tx) film produced through regular vacuum-assisted filtration have advantages of high conductivity, excellent mechanical performance, good surface wettability and others. However, the production method costs a large amount of time and energy, greatly limiting large-scale application of such film. Inspired by filtration of silt, we reveal and verify the feasibility of fast film forming through vacuum-assisted filtration of two-dimensional (2D) materials by using ions to induce MXene colloidal dispersion to transform into three-dimensional (3D) microgel in this work. A suitable gap between MXene microgel is the premise of sustainable fast water molecule filtration; the strong gelation and internal riveting effect inside the microgel ensure the formability of MXene film. Therefore, the production of MXene film is dramatically shortened from a few hours to just dozens of seconds. More importantly, MXene film prepared in this way can be folded and rubbed, and presents more excellent mechanical property, high electrochemical performance, and good electromagnetic interference shielding effective. This work provides theoretical and technical support for effective production of MXene film with excellent comprehensive properties and is of great significance to large-scale MXene film preparation and application.

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Water is a significant and abundant resource as well as a pure natural energy source. Many researchers have been reported on humidity-responsive actuators that mimick the humidity responsive behavior that widely exists in nature. Benefiting from advantages such as hydrophilicity, high electrical conductivity, and good dispersibility, MXenes (Ti 3 C 2 T x) show promising performance when applied to humidity-responsive actuators. This Minireview describes the preparation methods and structural characteristics of MXenes, and the mechanism of humidity responsive actuators. Recent important advances of MXene materials in actuators are objectively reviewed and evaluated, and existing issues are discussed. In addition, the development of these systems is outlined from the aspects of MXene preparation, structure control, design and assembly, and applications, and provides new ideas and guidance for the development of the next generation of high-performance MXene-based humidity-responsive actuators. 1 X n T x , where M is a transition metal (e. g. Ti, V, Nb, Mo, etc.), X is C or N element, and T represents chemical groups such as À OH, À O and À F. [31] Different from other two-dimensional materials, [a