通过与液态金属的连续桥接诱导出超强 MXene 薄膜。

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2024-07-04 DOI:10.1126/science.ado4257

Wei Li, Tianzhu Zhou, Zejun Zhang, Lei Li, Wangwei Lian, Yanlei Wang, Junfeng Lu, Jia Yan, Huagao Wang, Lei Wei, Qunfeng Cheng

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引用次数: 0

摘要

将碳化钛（Ti3C2Tx）MXene 纳米片组装成宏观薄膜是一项挑战，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。我们利用液态金属（LM）和细菌纤维素（BC）依次桥接 MXene 纳米片（LBM 薄膜），展示了一种超强宏观 MXene 薄膜，其拉伸强度达到 908.4 兆帕。使用重复循环刀片涂层的逐层方法将 LBM 薄膜的取向度提高到了 0.935，而具有良好变形能力的 LM 则将空隙减少到了 5.4%。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。顺序桥接为将其他二维纳米片组装成高性能材料提供了一条途径。

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Ultrastrong MXene film induced by sequential bridging with liquid metal

Assembling titanium carbide (Ti₃C₂T_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.

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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