期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 18, 页码 21831-21843出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c04962
关键词
mxene; waterborne polyurethane; hybrid aerogels; electromagnetic interference shielding; mechanical properties
资金
- Fundamental Research Funds for the Central Universities of Donghua University [CUSF-DHD-2020063]
- Graduate Student Innovation Fund of Donghua University [CUSF-DHD-2020063]
- Fundamental Research Funds for the Central Universities [2232020G-04]
This study fabricates a novel waterborne polyurethane/MXene/nickel ferrite hybrid aerogel with remarkable lightweight and mechanical properties, as well as high-efficiency EMI shielding performance. The hybrid aerogels exhibit high X-band EMI shielding effectiveness of 64.7 dB and specific SE values ranging from 1694 to 3124 dB.cm(3)/g, making them promising for long-term and effective EMI shielding in various application environments.
Flexible, ultralight, and mechanically robust electromagnetic interference (EMI) shielding materials are urgently demanded to manage the increasing electromagnetic radiation pollution, but it remains a great challenge to simultaneously achieve ultralight yet mechanically robust properties while retaining high-efficiency EMI shielding performance. Herein, we fabricate a novel waterborne polyurethane/Ti3C2Tx MXene/nickel ferrite (WPU/MXene/NiFe2O4) hybrid aerogel by constructing a strong chemical bonding interaction between an NCO-terminated WPU prepolymer and hydroxyl functionalized MXene nanosheets. The resultant aerogels exhibit remarkable lightweight and mechanical properties, particularly high compressive stress far exceeding that of other MXene-based and WPU-based porous materials. Furthermore, synergistic effects of the oriented porous architecture and the multiphase skeleton endow the hybrid aerogels with a high X-band EMI shielding effectiveness (SE) of 64.7 dB at a low density of similar to 38.2 mg/cm(3). The corresponding specific SE value achieves 1694-3124 dB.cm(3)/g, and the SSE/d is up to 15,620 dB.cm(2)/g, surpassing that of most reported EMI shielding materials. Importantly, this aerogel, with excellent electromagnetic radiation protection effects and shielding reliability, is highly promising for long-term and effective EMI shielding service in various application environments.
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