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<p>Natural fiber composites are a category of materials that are increasingly substituting processed fiber materials in technical applications. This research focuses on the investigation of a Poly Lactic Acid reinforced Hemp and Sisal Fiber (PLA/HSF) bio composite with varying fiber compositions. The composites are fabricated through melt blending and injection molding, then characterized to assess chemical interactions, stability, mechanical properties with and without the integration of a grafted polymer compatibilizer. Specifically in the absence of compatibilizer, PLA displayed the lowest mechanical performance, while PLA/HSF–30% demonstrated the highest mechanical strength. PLA/HSF–5% started with a hardness of approximately 84 Shore D, whereas PLA/HSF–30% reached about 92 Shore D, indicating a significant increase in surface resistance with higher fiber loading. In contrast, the mechanical performance of PLAMA/HSF-30% displayed substantial with 84&#xa0;MPa tensile strength, 79&#xa0;MPa flexural strength, 99% impact strength and 98 Shore D hardness validation which are relatively higher than PLA/HSF-30%. A distinct peak in the damping factor is observed between 60&#xa0;°C and 75&#xa0;°C across all samples. Overall, the results indicate that higher fiber content, especially at 30% together with the compatibilizer, significantly enhances mechanical strength due to improved stress transfer and fiber reinforcement within the PLA matrix. Additionally, the importance of fiber content on mechanical properties is confirmed through Analysis of Variance (ANOVA). The outcomes explored statistically significant models, with higher F-values indicating a greater influence of the mechanical parameters on the response.</p>

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Development and characterization of hybrid hemp and sisal fiber reinforced poly lactic acid composites for sustainable engineering applications

  • 期刊论文

  • 发表日期：

    2026年2月11日

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  • G. Yuvaraj,
  • Sandeep Kumar Poloju,
  • Sabbah Ataya,
  • Prakash Selvam

摘要

Natural fiber composites are a category of materials that are increasingly substituting processed fiber materials in technical applications. This research focuses on the investigation of a Poly Lactic Acid reinforced Hemp and Sisal Fiber (PLA/HSF) bio composite with varying fiber compositions. The composites are fabricated through melt blending and injection molding, then characterized to assess chemical interactions, stability, mechanical properties with and without the integration of a grafted polymer compatibilizer. Specifically in the absence of compatibilizer, PLA displayed the lowest mechanical performance, while PLA/HSF–30% demonstrated the highest mechanical strength. PLA/HSF–5% started with a hardness of approximately 84 Shore D, whereas PLA/HSF–30% reached about 92 Shore D, indicating a significant increase in surface resistance with higher fiber loading. In contrast, the mechanical performance of PLAMA/HSF-30% displayed substantial with 84 MPa tensile strength, 79 MPa flexural strength, 99% impact strength and 98 Shore D hardness validation which are relatively higher than PLA/HSF-30%. A distinct peak in the damping factor is observed between 60 °C and 75 °C across all samples. Overall, the results indicate that higher fiber content, especially at 30% together with the compatibilizer, significantly enhances mechanical strength due to improved stress transfer and fiber reinforcement within the PLA matrix. Additionally, the importance of fiber content on mechanical properties is confirmed through Analysis of Variance (ANOVA). The outcomes explored statistically significant models, with higher F-values indicating a greater influence of the mechanical parameters on the response.