Ultrathin MXene/Calcium Alginate Aerogel Film for High‐Performance Electromagnetic Interference Shielding

Advanced Materials Interfaces - Tập 6 Số 6 - 2019
Zehang Zhou1, Jize Liu1, Xinxing Zhang1, Dong Tian2, Zeying Zhan1, Canhui Lu1
1State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, 610065 P. R. China
2Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, 611130 P. R. China

Tóm tắt

AbstractUltrathin and high‐performance electromagnetic interference (EMI) shielding materials are urgently demanded for modern microelectronic devices. 2D metal carbides (MXenes) are considered as a promising EMI shielding material due to its metallic conductivity. In this study, sodium alginate is applied as interlayer spacer for Ti3C2Tx nanosheets, which not only prevents the restacking of lamella structure but also serves as building blocks for the sponge‐like structure. Ultrathin Ti3C2Tx/calcium alginate (CA) aerogel films with sponge‐like structure and only tens of microns thickness are prepared through divalent metal ion induced crosslinking, vacuum‐assisted‐filtration induced self‐assembly, and freeze‐drying. Taking advantage of its sponge‐like structure, which facilitates the dissipation of incident electromagnetic waves through multireflection and scattering Ti3C2Tx/CA aerogel film, presents excellent EMI shielding effectiveness (54.3 dB) at a very low thickness of 26 µm. Furthermore, Ti3C2Tx/CA aerogel film shows an outstanding specific EMI shielding efficiency (17586 dB cm2 g−1), which is superior to most reported synthetic materials. The preparation of ultrathin Ti3C2Tx/CA aerogel film provides facile strategy for designing and fabricating high‐performance MXene‐based EMI‐shielding materials, which is highly desirable for various applications including aerospace and smart electronic devices.

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Advanced Materials Interfaces

Tập 6 Số 6

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