期刊
ACS NANO
卷 15, 期 1, 页码 1465-1474出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c08830
关键词
MXene; composite; multifunctional hydrogel; electromagnetic interference shielding; terahertz absorption
类别
资金
- National Natural Science Foundation of China [51703248]
- Natural Science Foundation of Hunan Province [2019JJ50033]
- Fundamental Research Funds for the Central Universities
- Science Foundation Ireland (SFI) AMBER Centre
- European Research Council (ERC) CoG 3D2DPrint
- European Research Council (ERC) PoC eTextiles
In this study, a hydrogel-type shielding material incorporating MXene and poly(acrylic acid) was successfully fabricated through a biomineralization-inspired assembly route. The composite hydrogel exhibits excellent stretchability, recyclability, high shielding performance, and fast self-healing capability, making it suitable for electromagnetic interference shielding in terahertz technologies. The sensitive deformation responses of the hydrogel also allow for its use as an on-skin sensor. This work provides an alternative strategy for designing next-generation EMI shielding materials and a highly efficient method for fabricating MXene composites on a macroscopic scale.
The fast development of terahertz technologies demands high-performance electromagnetic interference (EMI) shielding materials to create safe electromagnetic environments. Despite tremendous breakthroughs in achieving superb shielding efficiency (SE), conventional shielding materials have high reflectivity and cannot be re-edited or recycled once formed, resulting in detrimental secondary electromagnetic pollution and poor adaptability. Herein, a hydrogel-type shielding material incorporating MXene and poly(acrylic acid) is fabricated through a biomineralization-inspired assembly route. The composite hydrogel exhibits excellent stretchability and recyclability, favorable shape adaptability and adhesiveness, and fast self-healing capability, demonstrating great application flexibility and reliability. More interestingly, the shielding performance of the hydrogel shows absorption-dominated feature due to the combination of the porous structure, moderate conductivity, and internal water-rich environment. High EMI SE of 45.3 dB and broad effective absorption bandwidth (0.2-2.0 THz) with excellent refection loss of 23.2 dB can be simultaneously achieved in an extremely thin hydrogel (0.13 mm). Furthermore, such hydrogel demonstrates sensitive deformation responses and can be used as an on-skin sensor. This work provides not only an alternative strategy for designing next-generation EMI shielding material but also a highly efficient and convenient method for fabricating MXene composite on macroscopic scales.
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