Assembling titanium carbide (Ti 3 C 2 T x ) MXene nanosheets into macroscopic films presents challenges, including voids, low orientation degree, and weak interfacial interactions, which reduce mechanical performance. We demonstrate an ultrastrong macroscopic MXene film using liquid metal (LM) and bacterial cellulose (BC) to sequentially bridge MXene nanosheets (an LBM film), achieving a tensile strength of 908.4 megapascals. A layer-by-layer approach using repeated cycles of blade coating improves the orientation degree to 0.935 in the LBM film, while a LM with good deformability reduces voids into porosity of 5.4%. The interfacial interactions are enhanced by the hydrogen bonding from BC and the coordination bonding with LM, which improves the stress-transfer efficiency. Sequential bridging provides an avenue for assembling other two-dimensional nanosheets into high-performance materials.

中文翻译：

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液态金属连续桥联诱导的超强 MXene 薄膜


组装碳化钛（Ti 3 C 2时间x ) 将 MXene 纳米片加工成宏观薄膜面临着挑战，包括空隙、低取向度和弱界面相互作用，这些都会降低机械性能。我们展示了一种超强宏观 MXene 薄膜，使用液态金属 (LM) 和细菌纤维素 (BC) 依次桥接 MXene 纳米片（LBM 薄膜），实现了 908.4 兆帕的拉伸强度。使用重复刮刀涂层循环的逐层方法将LBM薄膜的取向度提高到0.935，而具有良好变形能力的LM将空隙减少到5.4%的孔隙率。 BC 的氢键和 LM 的配位键增强了界面相互作用，从而提高了应力传递效率。顺序桥接提供了将其他二维纳米片组装成高性能材料的途径。