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<p>The reuse of epoxidized post-consumer soybean oil (RESO) in the production of eco-friendly composites is essential to reduce improper waste disposal, mitigate environmental damage, and adding value to a residue. This study investigated the production of sustainable composites based on RESO and sugarcane bagasse, evaluating their morphology, mechanical properties, and thermal degradation mechanism. The composites were cured with fumaric acid, catalyzed with tin(II) 2-ethylhexanoate (Sn(Oct)₂), and reinforced with both treated (TF) and untreated (UF) natural fibers. The best performance was achieved with the RESO/TF composite containing 20 parts per hundred resin (phr), showing improvements of 230.7% in elastic modulus, 64.2% in tensile strength, and 114.7% in Shore D hardness compared to neat RESO. Additionally, the impact strength (3.73&#xa0;kJ/m<sup>2</sup>) and contact angle (95.4°) were similar to that of the neat RESO, indicating that sulfuric acid treatment contributed to a synergistic effect on the evaluated properties. Both RESO/UF and RESO/TF composites exhibited greater thermal stability compared to the matrix, with degradation curves shifted to higher temperatures. Scanning electron microscopy (SEM) revealed good interfacial adhesion between the RESO matrix and treated fibers, indicating a more homogeneous distribution and reduced pullout, which supports the enhanced mechanical and thermal performance. The results align with the principles of the circular economy, contributing to pollution mitigation in natural ecosystems.</p>

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Sustainable composites based on post-consumer soybean oil and sugarcane bagasse: morphology, mechanical properties, and thermal degradation mechanism

  • 期刊论文

  • 发表日期：

    2025年12月3日

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  • Carlos Bruno Barreto Luna,
  • José Vinícius Melo Barreto,
  • Elieber Barros Bezerra,
  • Nicole Pereira Soares,
  • Ingridy Dayane dos Santos Silva,
  • Amanda Meneses Araújo,
  • Edcleide Maria Araújo,
  • Renate Maria Ramos Wellen

摘要

The reuse of epoxidized post-consumer soybean oil (RESO) in the production of eco-friendly composites is essential to reduce improper waste disposal, mitigate environmental damage, and adding value to a residue. This study investigated the production of sustainable composites based on RESO and sugarcane bagasse, evaluating their morphology, mechanical properties, and thermal degradation mechanism. The composites were cured with fumaric acid, catalyzed with tin(II) 2-ethylhexanoate (Sn(Oct)₂), and reinforced with both treated (TF) and untreated (UF) natural fibers. The best performance was achieved with the RESO/TF composite containing 20 parts per hundred resin (phr), showing improvements of 230.7% in elastic modulus, 64.2% in tensile strength, and 114.7% in Shore D hardness compared to neat RESO. Additionally, the impact strength (3.73 kJ/m2) and contact angle (95.4°) were similar to that of the neat RESO, indicating that sulfuric acid treatment contributed to a synergistic effect on the evaluated properties. Both RESO/UF and RESO/TF composites exhibited greater thermal stability compared to the matrix, with degradation curves shifted to higher temperatures. Scanning electron microscopy (SEM) revealed good interfacial adhesion between the RESO matrix and treated fibers, indicating a more homogeneous distribution and reduced pullout, which supports the enhanced mechanical and thermal performance. The results align with the principles of the circular economy, contributing to pollution mitigation in natural ecosystems.