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<p>This study set out to create epoxy composites using MB fibers without chemical treatment. As a reinforcement for polymer composites, bark fibers have lately become more common. Epoxy composites reinforced with Mesquite bark (MB) fibers were the subject of this paper’s thermal, mechanical, and morphological property analysis. The composites contained 5, 10, and 15&#xa0;mm MB fibers in a variety of counts and weight percentages (from 5 to 30 wt.%, with subsequent increments of 5%). This work compared the 18 resulting sample groups to neat epoxy samples. Adding MB fibers improved mechanical performance, even at the highest fiber content, as demonstrated in this study. Changing the fiber length from 5 to 15&#xa0;mm caused the composite to show contradictory effects. This is likely due to the fact that bark fibers have a tendency to twist and divide into fibrils under strain. Results showed that increasing the interface strength improved the composite’s tensile, flexural, Izod impact, and Shore A hardness as long as the fiber length was between 10&#xa0;mm and 15&#xa0;mm. It was clear that there was an improvement in interfacial adhesion between the matrix and reinforcement when using fibers with a diameter of 10&#xa0;mm compared to neat epoxy in terms of thermal degradation. The epoxy sufficiently shielded the MB fibers, allowing the composites to persevere deterioration at 318&#xa0;°C with little structural loss, under circumstances similar to those of pure resin.</p>

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Effect of fiber length on the mechanical and thermal performance of mesquite bark fiber reinforced epoxy composites

  • 期刊论文

  • 发表日期：

    2026年5月9日

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  • Jasgurpreet Singh Chohan,
  • Hrushikesh Sarangi,
  • Ravi Subramanyam,
  • R. Nirmal Kumar,
  • B. G. Sivakumar,
  • Srinivasan Suresh Kumar

摘要

This study set out to create epoxy composites using MB fibers without chemical treatment. As a reinforcement for polymer composites, bark fibers have lately become more common. Epoxy composites reinforced with Mesquite bark (MB) fibers were the subject of this paper’s thermal, mechanical, and morphological property analysis. The composites contained 5, 10, and 15 mm MB fibers in a variety of counts and weight percentages (from 5 to 30 wt.%, with subsequent increments of 5%). This work compared the 18 resulting sample groups to neat epoxy samples. Adding MB fibers improved mechanical performance, even at the highest fiber content, as demonstrated in this study. Changing the fiber length from 5 to 15 mm caused the composite to show contradictory effects. This is likely due to the fact that bark fibers have a tendency to twist and divide into fibrils under strain. Results showed that increasing the interface strength improved the composite’s tensile, flexural, Izod impact, and Shore A hardness as long as the fiber length was between 10 mm and 15 mm. It was clear that there was an improvement in interfacial adhesion between the matrix and reinforcement when using fibers with a diameter of 10 mm compared to neat epoxy in terms of thermal degradation. The epoxy sufficiently shielded the MB fibers, allowing the composites to persevere deterioration at 318 °C with little structural loss, under circumstances similar to those of pure resin.