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<p>The mechanical and machining behaviour of epoxy composites reinforced with areca fiber is investigated in this work, with a focus on the effects of aging and alkali–silane surface treatment. To improve fiber–matrix adhesion, areca fibers were treated sequentially with sodium hydroxide and 3-aminopropyltrimethoxysilane. Hand lay-up with degassing was used to fabricate the composites, which were subsequently cured at room temperature and post-cured at 110&#xa0;°C. The novelty of this study lies in the integrated evaluation of mechanical performance, drilling dimensional stability, and aging behaviour of alkali–silane treated areca fiber-reinforced epoxy composites, providing a comprehensive assessment of their suitability for engineering applications. After 30&#xa0;days of warm-water aging at 40&#xa0;°C, the treated composite containing 50 vol.% areca fiber exhibited significantly improved tensile (ASTM D3039), flexural (ASTM D790), and drilling dimensional stability (ASTM D2113) compared with untreated composites. Scanning Electron Microscopy (SEM) analysis confirmed enhanced fiber–matrix bonding and reduced void content in the treated composites, facilitating efficient stress transfer and improved durability. These findings demonstrate that alkali–silane treatment can produce high-performance areca fiber epoxy composites suitable for lightweight structural components, automotive panels, and sustainable construction materials.</p>

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Mechanical and drilling dimensional stability studies on alkali-silane surface treated areca fiber epoxy composite

  • 期刊论文

  • 发表日期：

    2026年8月4日

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  • S. Manoj Kumar,
  • Mathi Kannaiyan,
  • R. Gokuldass,
  • S. Hanish Anand,
  • T. V. B. Babu

摘要

The mechanical and machining behaviour of epoxy composites reinforced with areca fiber is investigated in this work, with a focus on the effects of aging and alkali–silane surface treatment. To improve fiber–matrix adhesion, areca fibers were treated sequentially with sodium hydroxide and 3-aminopropyltrimethoxysilane. Hand lay-up with degassing was used to fabricate the composites, which were subsequently cured at room temperature and post-cured at 110 °C. The novelty of this study lies in the integrated evaluation of mechanical performance, drilling dimensional stability, and aging behaviour of alkali–silane treated areca fiber-reinforced epoxy composites, providing a comprehensive assessment of their suitability for engineering applications. After 30 days of warm-water aging at 40 °C, the treated composite containing 50 vol.% areca fiber exhibited significantly improved tensile (ASTM D3039), flexural (ASTM D790), and drilling dimensional stability (ASTM D2113) compared with untreated composites. Scanning Electron Microscopy (SEM) analysis confirmed enhanced fiber–matrix bonding and reduced void content in the treated composites, facilitating efficient stress transfer and improved durability. These findings demonstrate that alkali–silane treatment can produce high-performance areca fiber epoxy composites suitable for lightweight structural components, automotive panels, and sustainable construction materials.