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<p>This study investigates the mechanical behavior of fiber-reinforced epoxy composites and hybrid laminates before and after alkali treatment, as well as under aging conditions. Glass, banana, and JUCO fibers were used to fabricate composites via hand layup with the cold press method. To study aging effects, the specimens were immersed for several months in solutions with pH values of 3, 7, and 8. Mechanical testing was performed on both treated and untreated composites to determine the influence of fiber treatments on strength and durability. The four-layer glass composite shows the highest tensile strength of 197.254&#xa0;MPa and flexural strength of 240.87&#xa0;MPa. JUCO-glass fiber hybrid composites exhibited superior performance to other hybrids, with tensile and flexural strengths of 88.609 and 157.33&#xa0;MPa, respectively, under dry conditions. Numerical analysis of tensile and flexural strength was also conducted to validate the experimental results. From the evaluation, it was found that treated hybrid composites have better mechanical properties compared to natural composites. However, prolonged exposure to aqueous environments reduced their performance due to fiber−matrix interfacial degradation. SEM micrographs of treated and untreated samples revealed voids, fiber buckling, breakage, surface roughening, and matrix debonding. The main objective of this study is to evaluate the impact of chemical treatment and aging of JUCO fiber-reinforced epoxy composites and hybrids. The investigation concludes that while hybrid composites offer improved performance, their durability in adverse environmental conditions requires further optimization.</p>

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Impact of chemical treatment and multi-medium aging on the performance of JUCO fiber and hybrid epoxy composites

  • 期刊论文

  • 发表日期：

    2025年11月25日

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  • B. M. Nafiz Anam,
  • Md Jamiur Rahman,
  • Md Mafidul Islam,
  • Md Foisal Hossain,
  • Muhammed Sohel Rana,
  • Md Shafiul Ferdous

摘要

This study investigates the mechanical behavior of fiber-reinforced epoxy composites and hybrid laminates before and after alkali treatment, as well as under aging conditions. Glass, banana, and JUCO fibers were used to fabricate composites via hand layup with the cold press method. To study aging effects, the specimens were immersed for several months in solutions with pH values of 3, 7, and 8. Mechanical testing was performed on both treated and untreated composites to determine the influence of fiber treatments on strength and durability. The four-layer glass composite shows the highest tensile strength of 197.254 MPa and flexural strength of 240.87 MPa. JUCO-glass fiber hybrid composites exhibited superior performance to other hybrids, with tensile and flexural strengths of 88.609 and 157.33 MPa, respectively, under dry conditions. Numerical analysis of tensile and flexural strength was also conducted to validate the experimental results. From the evaluation, it was found that treated hybrid composites have better mechanical properties compared to natural composites. However, prolonged exposure to aqueous environments reduced their performance due to fiber−matrix interfacial degradation. SEM micrographs of treated and untreated samples revealed voids, fiber buckling, breakage, surface roughening, and matrix debonding. The main objective of this study is to evaluate the impact of chemical treatment and aging of JUCO fiber-reinforced epoxy composites and hybrids. The investigation concludes that while hybrid composites offer improved performance, their durability in adverse environmental conditions requires further optimization.