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通过桥联诱导的致密化制备高强度可伸缩MXene薄膜
作者:小柯机器人 发布时间:2021/10/6 13:45:32

近日,北京航空航天大学程群峰课题组通过桥联诱导的致密化,成功实现了高强度可扩展MXene薄膜的制备。相关论文于2021年10月1日发表于国际顶尖学术期刊《科学》杂志上。

在该研究中,研究人员通过依次应用氢键和共价键桥联剂,诱导了MXene薄膜的致密化和空洞的去除,合成了高度致密的MXene薄膜。使用该方法获得的MXene薄膜具有高抗拉强度,同时具有高韧性、高导电性和高电磁干扰(EMI)屏蔽性能。这一高性能MXene薄膜是可以放大生产的,该方法为将其他二维薄片组装成高性能薄膜提供了一种途径。

据介绍,MXenes是一个不断发展的二维过渡金属碳化物和/或氮化物家族,它们紧密堆积成宏观层状薄膜,已被考虑用于柔性电磁干扰屏蔽材料等场合。然而,碳化钛MXene薄膜的机械和电气可靠性受到其结构中的空洞的影响。

附:英文原文

Title: High-strength scalable MXene films through bridging-induced densification

Author: Sijie Wan, Xiang Li, Ying Chen, Nana Liu, Yi Du, Shixue Dou, Lei Jiang, Qunfeng Cheng

Issue&Volume: 2021-10-01

Abstract: MXenes are a growing family of two-dimensional transition metal carbides and/or nitrides that are densely stacked into macroscopically layered films and have been considered for applications such as flexible electromagnetic interference (EMI) shielding materials. However, the mechanical and electrical reliabilities of titanium carbide MXene films are affected by voids in their structure. We applied sequential bridging of hydrogen and covalent bonding agents to induce the densification of MXene films and removal of the voids, leading to highly compact MXene films. The obtained MXene films show high tensile strength, in combination with high toughness, electrical conductivity, and EMI shielding capability. Our high-performance MXene films are scalable, providing an avenue for assembling other two-dimensional platelets into high-performance films.

DOI: abg2026

Source: https://www.science.org/doi/10.1126/science.abg2026#con8

 

期刊信息

Science:《科学》,创刊于1880年。隶属于美国科学促进会,最新IF:41.845
官方网址:https://www.sciencemag.org/
投稿链接:https://cts.sciencemag.org/scc/#/login