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<p>The development of high-performance functional composites has become a research hotspot in response to the hazards of overheating and electromagnetic radiation in modern electronic devices. Herein, we grew magnetic Fe<sub>3</sub>O<sub>4</sub> particles <i>in situ</i> on the MXene layer to obtain an MXene@Fe<sub>3</sub>O<sub>4</sub> composite with rich heterogeneous interfaces. Owing to the unique heterostructure and the synergistic effects of multiple electromagnetic wave absorption mechanisms, the composite achieved a minimum reflection loss of −27.14 dB and an effective absorption bandwidth of 2.05 GHz at an absorption thickness of 2 mm. Moreover, the MXene@Fe<sub>3</sub>O<sub>4</sub> composite could be encapsulated in thermoplastic polyurethane (TPU) via thermal curing. The obtained composite elastomer exhibited a strong tensile strength, and its thermal diffusivity was 113% higher than that of pure TPU. Such additional mechanical properties and thermal conduction features render this composite elastomer an advanced electromagnetic absorber to adapt to the ever-changing environment for expanding practical applications.</p>

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Heterogeneous interface enhanced polyurethane/MXene@Fe3O4 composite elastomers for electromagnetic wave absorption and thermal conduction

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • Xin An,
  • Zhaoxu Sun,
  • Jiahui Shen,
  • Jiajia Zheng,
  • Aixi Sun,
  • Xiping Li,
  • Shaohua Jiang,
  • Yiming Chen

摘要

The development of high-performance functional composites has become a research hotspot in response to the hazards of overheating and electromagnetic radiation in modern electronic devices. Herein, we grew magnetic Fe3O4 particles in situ on the MXene layer to obtain an MXene@Fe3O4 composite with rich heterogeneous interfaces. Owing to the unique heterostructure and the synergistic effects of multiple electromagnetic wave absorption mechanisms, the composite achieved a minimum reflection loss of −27.14 dB and an effective absorption bandwidth of 2.05 GHz at an absorption thickness of 2 mm. Moreover, the MXene@Fe3O4 composite could be encapsulated in thermoplastic polyurethane (TPU) via thermal curing. The obtained composite elastomer exhibited a strong tensile strength, and its thermal diffusivity was 113% higher than that of pure TPU. Such additional mechanical properties and thermal conduction features render this composite elastomer an advanced electromagnetic absorber to adapt to the ever-changing environment for expanding practical applications.