MXenes公司
材料科学
气凝胶
聚酰亚胺
涂层
复合材料
假弹性
纳米技术
图层(电子)
马氏体
微观结构
作者
Ji Liu,Haobin Zhang,Xi Xie,Rui Yang,Zhangshuo Liu,Ya‐Feng Liu,Zhong‐Zhen Yu
出处
期刊:Small
[Wiley]
日期:2018-10-07
卷期号:14 (45)
被引量:420
标识
DOI:10.1002/smll.201802479
摘要
2D transition metal carbides and nitrides (MXenes) have gained extensive attention recently due to their versatile surface chemistry, layered structure, and intriguing properties. The assembly of MXene sheets into macroscopic architectures is an important approach to harness their extraordinary properties. However, it is difficult to construct a freestanding, mechanically flexible, and 3D framework of MXene sheets owing to their weak intersheet interactions. Herein, an interfacial enhancement strategy to construct multifunctional, superelastic, and lightweight 3D MXene architectures by bridging individual MXene sheets with polyimide macromolecules is developed. The resulting lightweight aerogel exhibits superelasticity with large reversible compressibility, excellent fatigue resistance (1000 cycles at 50% strain), 20% reversible stretchability, and high electrical conductivity of ≈4.0 S m-1 . The outstanding mechanical flexibility and electrical conductivity make the aerogel promising for damping, microwave absorption coating, and flexible strain sensor. More interestingly, an exceptional microwave absorption performance with a maximum reflection loss of -45.4 dB at 9.59 GHz and a wide effective absorption bandwidth of 5.1 GHz are achieved.
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