Ultrastrong and Hydrophobic Sandwich-Structured MXene-Based Composite Films for High-Efficiency Electromagnetic Interference Shielding

被引:45
作者
Hu, Jiana [1 ,2 ]
Liang, Caiyun [1 ]
Li, Jiadong [1 ,2 ]
Lin, Chuanwei [1 ,2 ]
Liang, Yongjiu [1 ]
Dong, Dewen [1 ,2 ]
机构
[1] Chinese Acad Sci, Changchun Inst Appl Chem, CAS Key Lab High Performance Synthet Rubber & Comp, Changchun 130022, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Peoples R China
基金
中国博士后科学基金;
关键词
MXene; aramid nanofiber; sandwich structure; hydrophobicity; mechanical property; electromagnetic interference shielding; PERFORMANCE; ABSORPTION; ULTRATHIN; SURFACE;
D O I
10.1021/acsami.2c07741
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Electromagnetic interference (EMI) shielding materials are highly necessary to solve the problem of electromagnetic radiation. Transition-metal carbide/nitride (MXene) materials offer great potential for the construction of high-performance EMI shields because of their high electrical conductivity and versatile surface chemistry. However, MXene generally suffers from poor mechanical and oxidation-resistant properties, which hinders its practical applications. Herein, flexible, strong, and hydrophobic sandwich-structured composite films (H-S-MXene), consisting of a conductive MXene layer and supporting aramid nanofiber layer, were fabricated using step-by-step vacuum-assisted filtration and dip coating. Given the unique sandwich structure, hydrogen bonding interactions, and covalent cross-linking of the MXene sheets, the H-S-MXene composite films demonstrated simultaneously excellent EMI shielding and mechanical properties. The EMI HAI SE (ES) shielding effectiveness of the H-S-MXene composite film with 20 wt % MXene content reached 46.1 dB at thickness of 23.2 +/- 0.5 mu m, and the tensile strength of the film reached 302.1 MPa, which outperformed other reported EMI shielding materials. The excellent mechanical flexibility and hydrophobicity of the H-S-MXene composite films ensured a stable EMI shielding performance, which could withstand cycled bending, torsion, and exposure to aqueous environments. These impressive features made the H-S-MXene composite films promising candidates for electronic devices and aerospace. This study provides important guidance for the rational design of stable MXene-based composites with advanced properties.
引用
收藏
页码:33817 / 33828
页数:12
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