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Multifunctional tubular carbon nanofibers/polyurethane electromagnetic wave absorber with room-temperature self-healing and recyclable performance

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Abstract

Incorporating self-healing and recyclable capabilities into microwave absorbing materials is expected to facilitate the life extension, cost reduction, and performance stability, thereby meeting the practical applications. In this research, a recycling and room-temperature self-healing electromagnetic wave (EMW) absorber is designed, in which linear polyurethane cross-linked by aromatic disulfide bonds is used as healable matrix, and tubular carbon nanofibers (TCNFs) are employed to attenuate microwave. The resultant composites with a TCNFs content of 7 wt.% harvest a minimum reflection loss (RLmin) of −39.0 dB and an effective absorption bandwidth (EAB) of 2.9 GHz at a matching thickness of 4.0 mm. Driven by the reversible dynamic bonds including hydrogen bonds and aromatic disulfide bonds, the high healing efficiency of 88.7% at 25 °C and 93.2% at 60 °C is presented. Impressively, even after three repairing cycles at room temperature, a healable efficiency of 86.4% is acquired, and RLmin can still reach −39.1 dB at the same thickness, together with an EAB of 3.0 GHz. Additionally, the results of solvent recycling experiment manifest that the recycled specimen achieves the almost similar mechanical and microwave dissipation properties as original one. These attractive characteristics make the designed self-healing and recyclable composites promising for next-generation EMW consumption devices.

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Acknowledgements

This work was financially supported by the National Key Research and Development Program of China (No. 2021YFB3700101).

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Authors and Affiliations

  1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, 201620, China

    Zuming Hu & Junrong Yu

  2. College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China

    Shuai Kang, Zuming Hu, Na Li, Junrong Yu & Yan Wang

  3. Shanghai Collaborative Innovation Center for High Performance Fiber Composites, Donghua University, Shanghai, 201620, China

    Shiya Qiao

  4. Sinochem International Corporation, Shanghai, 200126, China

    Yutong Cao

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  1. Shuai Kang
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  2. Shiya Qiao
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  4. Zuming Hu
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Correspondence to Zuming Hu or Na Li.

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Multifunctional tubular carbon nanofibers/polyurethane electromagnetic wave absorber with room-temperature self-healing and recyclable performance

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Kang, S., Qiao, S., Cao, Y. et al. Multifunctional tubular carbon nanofibers/polyurethane electromagnetic wave absorber with room-temperature self-healing and recyclable performance. Nano Res. 16, 33–44 (2023). https://doi.org/10.1007/s12274-022-4743-2

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