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<p>In recent years, the demand for sustainable and lightweight materials has driven significant interest in natural fiber-reinforced polymer composites, particularly for structural applications like aerospace, automobiles, and sports goods. These materials offer substantial environmental and economic benefits while exhibiting satisfactory performance characteristics required for engineering applications. The current research is novel for incorporating carbon quantum dots (CQDs) created from sugarcane biomass and natural fiber pineapple/ramie into epoxy-based composite laminates. Incorporating CQDs allows for improved mechanical and surface properties significantly and has great promise as a sustainability, thereby enabling lighter-weight structural applications. Composite laminates were manufactured using a vacuum bag technique method. Among eight bio-composites laminates, Two single-fiber laminates were prepared, one with pineapple/CQDs and the other with ramie/CQDs. other six using CQDs, laminated composites were made with a five-layer hybrid of different stack sequences of pineapple and ramie fibers. Composite samples such as PRO1, PRO2, PRO3, PRO4, PRO5, PRO6, PRO7, and PRO8 were tested according to ASTM procedures to measure tensile, flexural, compressive strength, impact strength, and hardness. The results demonstrated that the inclusion of CQDs significantly improved mechanical properties. On the laminates tested, the PRO1 showed a maximum tensile strength of 57.86&#xa0;MPa, and the PRO8 showed an excellent flexural strength of 84.68&#xa0;MPa. The PRO4 had the highest compressive strength, at 42.75&#xa0;MPa, while the PRO2 had the highest Shore D hardness number of 72. Additional research was performed to assess surface behaviors and fiber-matrix interactions and consisted of a morphological study. Contact angle, water absorption, and swelling thickness tests are also carried out to understand these composite’s behaviour, especially when interacting with water. The morphological data showed fiber pull-outs and defects in the interface when there was a failure.</p> Graphical Abstract <p></p>

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Development and Characterization of Bio-Composites Reinforced with Pineapple/Ramie Fibers and Sugarcane Biomass-Derived Carbon Quantum Dots (CQDs)

  • 期刊论文

  • 发表日期：

    2025年8月4日

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  • K. Manikandan,
  • V. Ramesh,
  • M. Saleem

摘要

In recent years, the demand for sustainable and lightweight materials has driven significant interest in natural fiber-reinforced polymer composites, particularly for structural applications like aerospace, automobiles, and sports goods. These materials offer substantial environmental and economic benefits while exhibiting satisfactory performance characteristics required for engineering applications. The current research is novel for incorporating carbon quantum dots (CQDs) created from sugarcane biomass and natural fiber pineapple/ramie into epoxy-based composite laminates. Incorporating CQDs allows for improved mechanical and surface properties significantly and has great promise as a sustainability, thereby enabling lighter-weight structural applications. Composite laminates were manufactured using a vacuum bag technique method. Among eight bio-composites laminates, Two single-fiber laminates were prepared, one with pineapple/CQDs and the other with ramie/CQDs. other six using CQDs, laminated composites were made with a five-layer hybrid of different stack sequences of pineapple and ramie fibers. Composite samples such as PRO1, PRO2, PRO3, PRO4, PRO5, PRO6, PRO7, and PRO8 were tested according to ASTM procedures to measure tensile, flexural, compressive strength, impact strength, and hardness. The results demonstrated that the inclusion of CQDs significantly improved mechanical properties. On the laminates tested, the PRO1 showed a maximum tensile strength of 57.86 MPa, and the PRO8 showed an excellent flexural strength of 84.68 MPa. The PRO4 had the highest compressive strength, at 42.75 MPa, while the PRO2 had the highest Shore D hardness number of 72. Additional research was performed to assess surface behaviors and fiber-matrix interactions and consisted of a morphological study. Contact angle, water absorption, and swelling thickness tests are also carried out to understand these composite’s behaviour, especially when interacting with water. The morphological data showed fiber pull-outs and defects in the interface when there was a failure.

Graphical Abstract