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<p>Waste valorization has become a viable substitute for landfill disposal, underscoring the growing significance of environmentally friendly waste processing techniques. In this study, sugarcane biochar (SCB) derived from agricultural waste is used as an eco-friendly filler to reinforce Curaua fiber (CF)/polylactic acid (PLA) hybrid composites, aiming to enhance their sustainability. To improve the mechanical and structural properties, CF was pretreated with sodium bicarbonate solution (NaHCO<sub>3</sub>) for different durations: 0 (A-type), 12 (B-type), 24 (C-type), 48 (D-type), 60 (E-type), 120 (F-type), and 240&#xa0;h (G-type). Mechanical properties such as tensile, flexural, hardness, and impact strength were also evaluated for each treatment group. The results revealed that mechanical properties improved up to 60&#xa0;h of treatment, with tensile and flexural strength reaching 56.32&#xa0;MPa and 74.69&#xa0;MPa, respectively. However, these properties reduced at 120 (49.85&#xa0;MPa in tensile and 72.15&#xa0;MPa in flexural) and 240 (47.81&#xa0;MPa in tensile and 70.54&#xa0;MPa in flexural) hrs, suggesting that excessive treatment caused over-removal of key fiber constituents, resulting in brittleness and reduced performance. DSC analysis of NaHCO<sub>3</sub>-treated CF shows a shift in the moisture loss peak from 169 to 178&#xa0;°C with longer treatment duration, indicating enhanced thermal stability. Enthalpy values decreased at shorter durations but stabilized at 127.2&#xa0;J/g after 60&#xa0;h, confirming structural relaxation and hemicellulose depletion. These novel hybrid biocomposites have a potential application in various structural and non-structural items, including food packaging, pharmaceuticals, sports equipment, and automobile interiors.</p>

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Mechanical and Structural Characterization of Curauá Fiber, Sugarcane Biochar, and Poly(Lactic Acid) Hybrid Green Composites for Sustainable Biomass Utilization

  • 期刊论文

  • 发表日期：

    2025年7月3日

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  • Velmurugan Ganesan,
  • Jasgurpreet Singh Chohan,
  • Kumar Gengappan,
  • Prabhu Paramasivam,
  • Ramya Maranan,
  • Natrayan Lakshmaiya,
  • Suresh Kumar Shanmugam

摘要

Waste valorization has become a viable substitute for landfill disposal, underscoring the growing significance of environmentally friendly waste processing techniques. In this study, sugarcane biochar (SCB) derived from agricultural waste is used as an eco-friendly filler to reinforce Curaua fiber (CF)/polylactic acid (PLA) hybrid composites, aiming to enhance their sustainability. To improve the mechanical and structural properties, CF was pretreated with sodium bicarbonate solution (NaHCO3) for different durations: 0 (A-type), 12 (B-type), 24 (C-type), 48 (D-type), 60 (E-type), 120 (F-type), and 240 h (G-type). Mechanical properties such as tensile, flexural, hardness, and impact strength were also evaluated for each treatment group. The results revealed that mechanical properties improved up to 60 h of treatment, with tensile and flexural strength reaching 56.32 MPa and 74.69 MPa, respectively. However, these properties reduced at 120 (49.85 MPa in tensile and 72.15 MPa in flexural) and 240 (47.81 MPa in tensile and 70.54 MPa in flexural) hrs, suggesting that excessive treatment caused over-removal of key fiber constituents, resulting in brittleness and reduced performance. DSC analysis of NaHCO3-treated CF shows a shift in the moisture loss peak from 169 to 178 °C with longer treatment duration, indicating enhanced thermal stability. Enthalpy values decreased at shorter durations but stabilized at 127.2 J/g after 60 h, confirming structural relaxation and hemicellulose depletion. These novel hybrid biocomposites have a potential application in various structural and non-structural items, including food packaging, pharmaceuticals, sports equipment, and automobile interiors.