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<p>Environmental concerns related to synthetic filler reinforced polymer composites have led to rapid advances in sustainable bio-based materials. The originality of this research is in crafting Margosa gum reinforced epoxy composites and determining the ideal filler loading for multi-functionality. The composites with effects from 0 to 25 vol% of Margosa gum were produced through vacuum-assisted casting and tested for their mechanical, thermo-mechanical, dielectric, and moisture resistance properties. The hydroxyl-rich functional groups which facilitate strong interfacial bonding between filler and matrix were identified by FTIR analysis. Tensile strength rose from 32.5&#xa0;MPa for neat epoxy to 45.6&#xa0;MPa at a filler loading of 15 vol%, whereas flexural strength was increased from 72.4&#xa0;MPa to 97.8&#xa0;MPa. The highest impact strength (5.8 kJ/m<sup>2</sup>), storage modulus (3.02 GPa), and dielectric strength (33.5&#xa0;kV/mm) corresponded to the MG–20 composite. At 15 vol% filler loading, the water absorption dropped a lot to 17.8% from 31.4%. Increasing filler content led to an improvement in thermo-mechanical stiffness and thermal stability. Still, an overfilled situation (25 vol%) caused filler agglomeration and microvoid formation, thereby lowering the performance. Overall, MG–15 and MG–20 composites show the best-balanced multifunctional features suitable for lightweight structural and electrical insulation uses.</p>

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Optimization of multifunctional mechanical, thermo-mechanical, dielectric, and moisture resistance properties of Margosa gum reinforced epoxy composites for sustainable engineering applications

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月24日

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  • Balaji Venkatesan,
  • A. Arunkumar,
  • P. Prabhu,
  • P. Manoj Kumar,
  • V. Sivakumar,
  • M. Venkatasudhahar,
  • C. Ramesh,
  • Dawit Tafesse Gebreyohannes

摘要

Environmental concerns related to synthetic filler reinforced polymer composites have led to rapid advances in sustainable bio-based materials. The originality of this research is in crafting Margosa gum reinforced epoxy composites and determining the ideal filler loading for multi-functionality. The composites with effects from 0 to 25 vol% of Margosa gum were produced through vacuum-assisted casting and tested for their mechanical, thermo-mechanical, dielectric, and moisture resistance properties. The hydroxyl-rich functional groups which facilitate strong interfacial bonding between filler and matrix were identified by FTIR analysis. Tensile strength rose from 32.5 MPa for neat epoxy to 45.6 MPa at a filler loading of 15 vol%, whereas flexural strength was increased from 72.4 MPa to 97.8 MPa. The highest impact strength (5.8 kJ/m2), storage modulus (3.02 GPa), and dielectric strength (33.5 kV/mm) corresponded to the MG–20 composite. At 15 vol% filler loading, the water absorption dropped a lot to 17.8% from 31.4%. Increasing filler content led to an improvement in thermo-mechanical stiffness and thermal stability. Still, an overfilled situation (25 vol%) caused filler agglomeration and microvoid formation, thereby lowering the performance. Overall, MG–15 and MG–20 composites show the best-balanced multifunctional features suitable for lightweight structural and electrical insulation uses.