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<p>Graphene membrane is used for heat diffusion in electrical components because of their excellent thermal conductivity, but thigh thermal conductivity inevitably leads to hygroscopic condensation under high humidity conditions, which results in short-circuiting of components and a significant reduction in service life. Therefore, in this study, a biomimetic lotus leaf structure was used to construct rough micro- and nanostructures on the surface of graphene membranes using BN/multi-walled carbon nanotubes (MWCNTs) and 1<i>H</i>, 1<i>H</i>, 2<i>H</i>, 2<i>H</i>-Perfluorooctanetriethoxysilane (POTS) to prepare composited membrane with superhydrophobic properties. The results show that the composited membrane has a high hydrophobicity angle of 162.7&#xa0;±&#xa0;3.1° and a rolling angle of 3.3&#xa0;±&#xa0;2°, in addition, the composited membrane has high thermal properties due to the addition of graphene. The performance test shows that the composited membrane with the mass ratio of BN/MWCNTs of 7:1 has the most excellent superhydrophobicity and high thermal conductivity at the same time and still has stable physical and chemical properties, and the composited membrane has superior self-cleaning and antifouling properties, and it has a very high durability in the practical application. This study used a mechanical hybrid spraying preparation method that is easy to operate and expand production and prepared BN/MWCNTs composite films with significant superhydrophobic and thermal conductivity effects. It can be applied to both flexible and rigid substrates, providing a new approach for solving thermal management problems in electronic devices.</p> Graphical abstract

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Biomimetic lotus leaf inspired superhydrophobic BN/MWCNTs/Graphene composited membrane for enhanced thermal performance

  • 期刊论文

  • 发表日期：

    2025年9月2日

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  • Xiangyu Han,
  • Zuozhu Yin,
  • Yingping Yang,
  • Yuhua Chen,
  • Zhen Hong,
  • Chan Xie,
  • Yidan Luo,
  • Mingshan Xue

摘要

Graphene membrane is used for heat diffusion in electrical components because of their excellent thermal conductivity, but thigh thermal conductivity inevitably leads to hygroscopic condensation under high humidity conditions, which results in short-circuiting of components and a significant reduction in service life. Therefore, in this study, a biomimetic lotus leaf structure was used to construct rough micro- and nanostructures on the surface of graphene membranes using BN/multi-walled carbon nanotubes (MWCNTs) and 1H, 1H, 2H, 2H-Perfluorooctanetriethoxysilane (POTS) to prepare composited membrane with superhydrophobic properties. The results show that the composited membrane has a high hydrophobicity angle of 162.7 ± 3.1° and a rolling angle of 3.3 ± 2°, in addition, the composited membrane has high thermal properties due to the addition of graphene. The performance test shows that the composited membrane with the mass ratio of BN/MWCNTs of 7:1 has the most excellent superhydrophobicity and high thermal conductivity at the same time and still has stable physical and chemical properties, and the composited membrane has superior self-cleaning and antifouling properties, and it has a very high durability in the practical application. This study used a mechanical hybrid spraying preparation method that is easy to operate and expand production and prepared BN/MWCNTs composite films with significant superhydrophobic and thermal conductivity effects. It can be applied to both flexible and rigid substrates, providing a new approach for solving thermal management problems in electronic devices.

Graphical abstract