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This workSweat absorption investigatesComposites theRamie fiber flexuralHardness and hardnessHardness behavior of epoxy compositesEpoxy composites reinforced with ramie fibersRamie fiber, with and without sweat absorptionSweat absorption. CompositesComposites containing 0%, 40%, and 60% fiber volume fractions (vol%) were produced and subjected to mechanical testsMechanical test and morphological analysis. Results show that ramie fiberRamie fiber addition improves flexural strengthFlexural strength, stiffness, and surface hardnessHardness compared to pure resin, with the 40% fraction exhibiting the best balance between reinforcement and structural integrity. However, artificial sweat absorptionSweat absorption significantly reduces flexural properties, mainly due to fiber swelling and matrix–fiber interface degradation, as evidenced by SEM analysis. In contrast, hardnessHardness was less affected by sweat exposure, indicating greater surface stability. The main objective of this study is to evaluate the influence of artificial sweat absorptionSweat absorption on the flexural and hardnessHardness behavior of epoxy compositesEpoxy composites reinforced with different ramie fiberRamie fiber contents. These findings highlight the potential of ramie fiberRamie fiber compositesComposites for sustainable applications, while also emphasizing the importance of moisture control to ensure long-term performance.

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Flexural and Hardness Behavior of Ramie Fiber-Reinforced Composites with and Without Sweat Absorption

  • 会议论文

  • 发表日期：

    2026年

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  • Luís Fernando Fortunato de Freitas,
  • Victor Paes Dias Gonçalves,
  • Michel Picanço Oliveira,
  • Noam Tonini Simonassi,
  • Ana Paula da Fonseca Piedade,
  • Felipe Perissé Duarte Lopes

摘要

This workSweat absorption investigatesComposites theRamie fiber flexuralHardness and hardnessHardness behavior of epoxy compositesEpoxy composites reinforced with ramie fibersRamie fiber, with and without sweat absorptionSweat absorption. CompositesComposites containing 0%, 40%, and 60% fiber volume fractions (vol%) were produced and subjected to mechanical testsMechanical test and morphological analysis. Results show that ramie fiberRamie fiber addition improves flexural strengthFlexural strength, stiffness, and surface hardnessHardness compared to pure resin, with the 40% fraction exhibiting the best balance between reinforcement and structural integrity. However, artificial sweat absorptionSweat absorption significantly reduces flexural properties, mainly due to fiber swelling and matrix–fiber interface degradation, as evidenced by SEM analysis. In contrast, hardnessHardness was less affected by sweat exposure, indicating greater surface stability. The main objective of this study is to evaluate the influence of artificial sweat absorptionSweat absorption on the flexural and hardnessHardness behavior of epoxy compositesEpoxy composites reinforced with different ramie fiberRamie fiber contents. These findings highlight the potential of ramie fiberRamie fiber compositesComposites for sustainable applications, while also emphasizing the importance of moisture control to ensure long-term performance.