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<p>This research investigates the mechanical properties, V-notch rail shear strength, and thermal conductivity of vinyl ester-based composites reinforced with chopped nutmeg fiber and peanut husk-derived biogenic silica. The reinforcing materials were surface-treated using 3-Aminopropyltrimethoxysilane (silane coupling agent), and the composites were fabricated using a specially designed mold and subjected to tensile, flexural, impact, hardness, V-Notch rail shear, and thermal conductivity tests in accordance with ASTM standards. The results indicate that reinforcement enhances the overall composite performance. The composite containing 30 vol. % fiber and 1 vol. % filler particles (NFS1) exhibited superior mechanical properties, with a tensile strength of 168&#xa0;MPa, flexural strength of 187&#xa0;MPa, impact resistance of 5.0&#xa0;kJ/m<sup>2</sup>, and V-notch rail shear strength of 28&#xa0;MPa. In contrast, the composite NFS2, with 3 vol. % filler, demonstrated the highest thermal conductivity of 0.496 W/mK and hardness of 99 shore-D. Additionally, the Scanning Electron Microscopy (SEM) was used to analyse the fractured surface morphology and failure mechanisms of the tested specimens. These enhanced properties make the composites highly suitable for applications in the construction, automotive, transportation, and biomedical fields.</p>

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Role of silane surface treatment of cellulose-rich nutmeg fiber and peanut husk waste biogenic silica on the mechanical, thermal, and laminar shear strength of vinyl ester resin biocomposites

  • 期刊论文

  • 发表日期：

    2026年4月27日

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  • Kumar Duraisamy,
  • N. Nagabhooshanam,
  • Dhandapany sendil Kumar,
  • D. R. Srinivasan

摘要

This research investigates the mechanical properties, V-notch rail shear strength, and thermal conductivity of vinyl ester-based composites reinforced with chopped nutmeg fiber and peanut husk-derived biogenic silica. The reinforcing materials were surface-treated using 3-Aminopropyltrimethoxysilane (silane coupling agent), and the composites were fabricated using a specially designed mold and subjected to tensile, flexural, impact, hardness, V-Notch rail shear, and thermal conductivity tests in accordance with ASTM standards. The results indicate that reinforcement enhances the overall composite performance. The composite containing 30 vol. % fiber and 1 vol. % filler particles (NFS1) exhibited superior mechanical properties, with a tensile strength of 168 MPa, flexural strength of 187 MPa, impact resistance of 5.0 kJ/m2, and V-notch rail shear strength of 28 MPa. In contrast, the composite NFS2, with 3 vol. % filler, demonstrated the highest thermal conductivity of 0.496 W/mK and hardness of 99 shore-D. Additionally, the Scanning Electron Microscopy (SEM) was used to analyse the fractured surface morphology and failure mechanisms of the tested specimens. These enhanced properties make the composites highly suitable for applications in the construction, automotive, transportation, and biomedical fields.