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<p>This study examines the mechanical, wear, thermal, and water absorption behavior of vinyl silane-treated epoxy composites reinforced with bast fibers from <i>Grewia optiva</i> and <i>Sida</i> wireweed fibers. The fibers and filler were surface-modified using a vinyl silane coupling agent to enhance compatibility with the epoxy matrix. Composite specimens were fabricated via the stir casting method and post-cured at 120&#xa0;°C for 48&#xa0;h. Among all samples, EC3 (containing 5 vol.% coconut timber dust filler and <i>Grewia optiva</i> bast fiber) exhibited superior properties compared to Epoxy (E). EC3 showed a tensile strength of 145&#xa0;MPa (a 10.7% increase over E), flexural strength of 178&#xa0;MPa (an 11.3% increase over E), interlaminar shear strength (ILSS) of 28&#xa0;MPa, impact energy of 5.41&#xa0;J, hardness of 82 Shore D, wear rate of 0.0174 mm<sup>3</sup>/Nm, thermal conductivity of 0.45 W/mK, and water absorption of 0.45%. Scanning Electron Microscopy (SEM) analysis confirmed improved fiber-matrix adhesion and uniform dispersion, supporting EC3’s enhanced performance. These results demonstrate that incorporating vinyl silane-treated <i>Grewia optiva</i> and <i>Sida</i> wireweed fibers with coconut timber dust filler significantly improves mechanical and physical properties, making these composites promising for industrial applications.</p>

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Effect of Vinyl Silane Treated Bast Fibers and Wood Biomass Filler Incorporated Epoxy Resin Composite – A Characterization Study

  • 期刊论文

  • 发表日期：

    2026年1月13日

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  • G. Yuvaraj,
  • Sureshkumar Myilsamy,
  • Vishnu Sakravathy N,
  • D. Rajesh Kumar

摘要

This study examines the mechanical, wear, thermal, and water absorption behavior of vinyl silane-treated epoxy composites reinforced with bast fibers from Grewia optiva and Sida wireweed fibers. The fibers and filler were surface-modified using a vinyl silane coupling agent to enhance compatibility with the epoxy matrix. Composite specimens were fabricated via the stir casting method and post-cured at 120 °C for 48 h. Among all samples, EC3 (containing 5 vol.% coconut timber dust filler and Grewia optiva bast fiber) exhibited superior properties compared to Epoxy (E). EC3 showed a tensile strength of 145 MPa (a 10.7% increase over E), flexural strength of 178 MPa (an 11.3% increase over E), interlaminar shear strength (ILSS) of 28 MPa, impact energy of 5.41 J, hardness of 82 Shore D, wear rate of 0.0174 mm3/Nm, thermal conductivity of 0.45 W/mK, and water absorption of 0.45%. Scanning Electron Microscopy (SEM) analysis confirmed improved fiber-matrix adhesion and uniform dispersion, supporting EC3’s enhanced performance. These results demonstrate that incorporating vinyl silane-treated Grewia optiva and Sida wireweed fibers with coconut timber dust filler significantly improves mechanical and physical properties, making these composites promising for industrial applications.