Scholarlink

<p>Flexible absorption-dominant electromagnetic interference (EMI) shielding materials are essential for sensitive electronic devices, such as those in telecommunications, the automotive industry, aerospace, and flexible electronics, owing to their lower reflection of electromagnetic waves, as well as their adaptability and lightweight. However, it is still a great challenge to achieve high absorption ability and wide bandwidth simultaneously, along with the flexibility to accommodate device deformation. In this study, flexible multilayer Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> (ML-Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub>)/polytetrafluoroethylene (PTFE) composite films with adjustable EMI shielding ability were fabricated via a roll-to-roll method. The multiple loss mechanisms induced by the cavity structure of the ML-Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> microparticles and the “brick-mortar‭ network of the composite film provide more channels for multiple reflections and scattering of incident electromagnetic waves. In addition, the impedance matching could be customized by controlling the thickness of the film and the ratio of ML-Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> to achieve high absorption ability. As a result, a high EMI shielding effectiveness value of 70 dB in the X-band with only 0.0004% reflection is achieved by the 3.5-mm ML-Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub>/PTFE-25 wt % film. Notably, benefiting from the strong interactions between the two components, the properties of the films remain constant even after deformation and extremely low-temperature (−200°C) treatment, indicating promising potential for future multiple applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Free-standing Ti3C2Tx film with customizable impedance matching for absorptive electromagnetic shielding

  • 期刊论文

  • 发表日期：

    2025年4月9日

查看全文
  • Tongqing Zhou,
  • Yan Bai,
  • Tiansui Jiang,
  • Wenkun Fei,
  • Shujuan Liu,
  • Jianmin Li,
  • Qiang Zhao

摘要

Flexible absorption-dominant electromagnetic interference (EMI) shielding materials are essential for sensitive electronic devices, such as those in telecommunications, the automotive industry, aerospace, and flexible electronics, owing to their lower reflection of electromagnetic waves, as well as their adaptability and lightweight. However, it is still a great challenge to achieve high absorption ability and wide bandwidth simultaneously, along with the flexibility to accommodate device deformation. In this study, flexible multilayer Ti3C2Tx (ML-Ti3C2Tx)/polytetrafluoroethylene (PTFE) composite films with adjustable EMI shielding ability were fabricated via a roll-to-roll method. The multiple loss mechanisms induced by the cavity structure of the ML-Ti3C2Tx microparticles and the “brick-mortar‭ network of the composite film provide more channels for multiple reflections and scattering of incident electromagnetic waves. In addition, the impedance matching could be customized by controlling the thickness of the film and the ratio of ML-Ti3C2Tx to achieve high absorption ability. As a result, a high EMI shielding effectiveness value of 70 dB in the X-band with only 0.0004% reflection is achieved by the 3.5-mm ML-Ti3C2Tx/PTFE-25 wt % film. Notably, benefiting from the strong interactions between the two components, the properties of the films remain constant even after deformation and extremely low-temperature (−200°C) treatment, indicating promising potential for future multiple applications.