Scholarlink

<p>Microwave absorbing materials with enhanced shielding effectiveness have been proposed using carbon-based fillers. The present work is intended to design MWCNT/epoxy and Graphene/epoxy with wt.% of 0.25, 0.5, 0.75, and 1% for the application of electromagnetic interference shielding. The materials are characterized, and nanocomposites are fabricated using the hand layup technique. A waveguide measurement setup is utilized to measure S-parameters to assess the reflection and transmission characteristics of the composites in X-band. The results are obtained using electromagnetic wave theory, and the study evaluates the effectiveness of individual filler systems, demonstrating that both MWCNTs and graphene show significant crystallinity and conductivity, which enhance their suitability for EMI shielding. It is observed that the graphene nanocomposite of 1wt.% enhances the reflection coefficient from − 9&#xa0;dB to − 14.5&#xa0;dB. The findings indicate that MWCNTs at a concentration of 1&#xa0;wt.% improve attenuation performance by around 68%. The results indicate that 1&#xa0;wt.% graphene exhibits a remarkable electromagnetic shielding effectiveness of − 29&#xa0;dB, signifying a 93% absorption of incoming radiation. This advancement lays the groundwork for creating lightweight, high-performance shielding materials.</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

Enhanced Electromagnetic Shielding in X-Band Applications Using Graphene and Multiwalled Carbon Nanotube Reinforced Epoxy Nanocomposites

  • 期刊论文

  • 发表日期：

    2025年12月24日

查看全文
  • Mir Sadat Ali,
  • Haribabu Yegireddy,
  • Yarrapragada KSS Rao,
  • Nabin Chandra Sahu,
  • Narendra Kumar Kolla,
  • Javed Syed

摘要

Microwave absorbing materials with enhanced shielding effectiveness have been proposed using carbon-based fillers. The present work is intended to design MWCNT/epoxy and Graphene/epoxy with wt.% of 0.25, 0.5, 0.75, and 1% for the application of electromagnetic interference shielding. The materials are characterized, and nanocomposites are fabricated using the hand layup technique. A waveguide measurement setup is utilized to measure S-parameters to assess the reflection and transmission characteristics of the composites in X-band. The results are obtained using electromagnetic wave theory, and the study evaluates the effectiveness of individual filler systems, demonstrating that both MWCNTs and graphene show significant crystallinity and conductivity, which enhance their suitability for EMI shielding. It is observed that the graphene nanocomposite of 1wt.% enhances the reflection coefficient from − 9 dB to − 14.5 dB. The findings indicate that MWCNTs at a concentration of 1 wt.% improve attenuation performance by around 68%. The results indicate that 1 wt.% graphene exhibits a remarkable electromagnetic shielding effectiveness of − 29 dB, signifying a 93% absorption of incoming radiation. This advancement lays the groundwork for creating lightweight, high-performance shielding materials.