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<p>The present research investigated the multifunctional performance of vinyl ester composites reinforced with silane treated <i>Cyperus platystylis</i> stem fiber and silver oxide nanoparticles. Composites containing 50 vol% treated natural fiber and varying nanoparticle concentrations (0.5–3.5 vol%) were fabricated and systematically evaluated for their mechanical, dielectric, magnetic, thermal and electromagnetic interference (EMI) shielding properties. The results indicated that silane treatment significantly improved fiber-matrix interfacial bonding which enhanced stress transfer and overall composite performance. Among the developed composites, the MPS1 composite containing 1.5 vol% silver oxide nanoparticles exhibited the optimum performance with a tensile strength of 154&#xa0;MPa, flexural strength of 170&#xa0;MPa, impact strength of 5&#xa0;J and hardness of 86 shore D. In addition, the composite demonstrated improved dielectric permittivity (3.68) enhanced magnetic permeability and reduced thermal conductivity (0.33&#xa0;W/mK) indicating better insulating capability. The EMI shielding effectiveness reached a maximum of 31.86 dB at 8&#xa0;GHz and 63.74 dB at 18&#xa0;GHz confirming strong electromagnetic wave attenuation due to enhanced interfacial polarization and conductive network formation. Overall, the synergistic effect of silane-treated natural fibers and optimally dispersed silver oxide nanoparticles significantly improved the multifunctional properties of the vinyl ester composites making them promising materials for advanced engineering and electromagnetic shielding applications.</p>

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Vinyl ester composites reinforced with Cyperus platystylis stem fibre and silver oxide nanoparticles: a research on mechanical, thermal, dielectric, magnetic and electromagnetic shielding properties

  • 期刊论文

  • 发表日期：

    2026年4月15日

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  • Ishrat Meera Mirzana,
  • Dhandapany sendil Kumar,
  • D. R. Srinivasan,
  • Yousef A. Baker El-Ebiary,
  • Sachitanand Singh,
  • N. Nagabhooshanam,
  • Medapati Sreenivasa Reddy,
  • Yaswanth KK

摘要

The present research investigated the multifunctional performance of vinyl ester composites reinforced with silane treated Cyperus platystylis stem fiber and silver oxide nanoparticles. Composites containing 50 vol% treated natural fiber and varying nanoparticle concentrations (0.5–3.5 vol%) were fabricated and systematically evaluated for their mechanical, dielectric, magnetic, thermal and electromagnetic interference (EMI) shielding properties. The results indicated that silane treatment significantly improved fiber-matrix interfacial bonding which enhanced stress transfer and overall composite performance. Among the developed composites, the MPS1 composite containing 1.5 vol% silver oxide nanoparticles exhibited the optimum performance with a tensile strength of 154 MPa, flexural strength of 170 MPa, impact strength of 5 J and hardness of 86 shore D. In addition, the composite demonstrated improved dielectric permittivity (3.68) enhanced magnetic permeability and reduced thermal conductivity (0.33 W/mK) indicating better insulating capability. The EMI shielding effectiveness reached a maximum of 31.86 dB at 8 GHz and 63.74 dB at 18 GHz confirming strong electromagnetic wave attenuation due to enhanced interfacial polarization and conductive network formation. Overall, the synergistic effect of silane-treated natural fibers and optimally dispersed silver oxide nanoparticles significantly improved the multifunctional properties of the vinyl ester composites making them promising materials for advanced engineering and electromagnetic shielding applications.