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<p>In recent decades, environmental friendly materials have gained significant attention in manufacturing industries due to increasing ecological concerns. Natural fiber-reinforced polymer composites have emerged as a sustainable replacement to synthetic fiber composites owing to their biodegradability, renewability, and favorable mechanical properties. In the present study, Tamarindus indica fiber, commonly known as tamarind crop fiber, is used as reinforcement in an epoxy matrix to develop biodegradable composite materials. The extracted tamarind fibers were thoroughly cleaned and subjected to alkali treatment using NaOH, KOH and Stearic acid to enhance fiber–matrix interfacial bonding. Composite laminates were fabricated using the compression molding process with varying fiber layer configurations (single layer in 3&#xa0;mm, double layer in 3.5&#xa0;mm and triple layer in 4&#xa0;mm). The mechanical characterisations of the developed composites were investigated as per ASTM standards. The results showed that chemically treated layer composites exhibit significantly improved mechanical performance compared to untreated layer composites. Among the different configurations, the triple layer stearic acid treated fiber composite exhibited an impressive increase in mechanical strength, like tensile strength (36.96&#xa0;MPa), flexural strength (81.4&#xa0;MPa), and impact strength (2.983&#xa0;J/cm²) compared to untreated composites and NaOH treated composites exhibited the maximum hardness value of 87. Additionally, scanning electron microscope (SEM) analysis was carrying out to identify the surface morphology and interfacial behavior of the composites, providing insights into the improved bonding mechanism.</p>

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Improving mechanical characteristics of Tamarindus indica fiber composites through surface modification treatment for eco-friendly engineering materials

  • 期刊论文

  • 发表日期：

    2026年6月27日

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  • S. P. Jani,
  • B. Muthu Chozha Rajan,
  • Mohammed Gouse Pasha,
  • Sujin Jose Arul,
  • P. Senthil Kumar

摘要

In recent decades, environmental friendly materials have gained significant attention in manufacturing industries due to increasing ecological concerns. Natural fiber-reinforced polymer composites have emerged as a sustainable replacement to synthetic fiber composites owing to their biodegradability, renewability, and favorable mechanical properties. In the present study, Tamarindus indica fiber, commonly known as tamarind crop fiber, is used as reinforcement in an epoxy matrix to develop biodegradable composite materials. The extracted tamarind fibers were thoroughly cleaned and subjected to alkali treatment using NaOH, KOH and Stearic acid to enhance fiber–matrix interfacial bonding. Composite laminates were fabricated using the compression molding process with varying fiber layer configurations (single layer in 3 mm, double layer in 3.5 mm and triple layer in 4 mm). The mechanical characterisations of the developed composites were investigated as per ASTM standards. The results showed that chemically treated layer composites exhibit significantly improved mechanical performance compared to untreated layer composites. Among the different configurations, the triple layer stearic acid treated fiber composite exhibited an impressive increase in mechanical strength, like tensile strength (36.96 MPa), flexural strength (81.4 MPa), and impact strength (2.983 J/cm²) compared to untreated composites and NaOH treated composites exhibited the maximum hardness value of 87. Additionally, scanning electron microscope (SEM) analysis was carrying out to identify the surface morphology and interfacial behavior of the composites, providing insights into the improved bonding mechanism.