Scholarlink

<p>The widespread usage and interconnectivity of electronic and communication devices contribute to a growing number of electromagnetic signals, which significantly threaten the normal functioning of electronic components and raise concerns about human safety. Polymer-based shielding materials have gained widespread adoption due to their characteristics such as lightweight, high specific strength, and good chemical stability. In this work, our objective was to develop a conductive network suitable for high-frequency electromagnetic interference (EMI) shielding applications by combining polyvinylidene fluoride (PVDF) with highly conductive ruthenium dioxide (RuO<sub>2</sub>). The phase purity of the composites fabricated through the solution mixing and rapid coagulation method was confirmed by x-ray diffraction (XRD) and Fourier transform infrared (FT-IR) analysis. Conductivity analysis revealed that percolation was achieved by the incorporation of 15&#xa0;wt.% of RuO<sub>2</sub>, and broadband dielectric studies suggested that percolation led to negative relative permittivity in the entire frequency range. PVDF-RuO<sub>2</sub> composites exhibited maximum shielding efficiency of 35.05&#xa0;dB for filler loading of 15&#xa0;wt.%. This reasonably high EMI shielding effectiveness is due to interfacial polarization, conductive loss, and multiple internal reflections occurring in the PVDF-RuO<sub>2</sub> composites.</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

Ruthenium Dioxide-Reinforced Polyvinylidene Fluoride Composites for High-Frequency Electromagnetic Interference Shielding

  • 期刊论文

  • 发表日期：

    2025年2月20日

查看全文
  • Arunima S. Kala,
  • Jagadeesh Mohanan,
  • I. N. Jawahar,
  • Subodh Ganesanpotti

摘要

The widespread usage and interconnectivity of electronic and communication devices contribute to a growing number of electromagnetic signals, which significantly threaten the normal functioning of electronic components and raise concerns about human safety. Polymer-based shielding materials have gained widespread adoption due to their characteristics such as lightweight, high specific strength, and good chemical stability. In this work, our objective was to develop a conductive network suitable for high-frequency electromagnetic interference (EMI) shielding applications by combining polyvinylidene fluoride (PVDF) with highly conductive ruthenium dioxide (RuO2). The phase purity of the composites fabricated through the solution mixing and rapid coagulation method was confirmed by x-ray diffraction (XRD) and Fourier transform infrared (FT-IR) analysis. Conductivity analysis revealed that percolation was achieved by the incorporation of 15 wt.% of RuO2, and broadband dielectric studies suggested that percolation led to negative relative permittivity in the entire frequency range. PVDF-RuO2 composites exhibited maximum shielding efficiency of 35.05 dB for filler loading of 15 wt.%. This reasonably high EMI shielding effectiveness is due to interfacial polarization, conductive loss, and multiple internal reflections occurring in the PVDF-RuO2 composites.