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<p>Present research focused on the formation and effect of melamine–formaldehyde self-healing microcapsules on the mechanical performance of sisal, hemp and abaca reinforced epoxy composites. Self-healing microcapsules were formed by combining 3.12&#xa0;g of melamine–formaldehyde and 0.75&#xa0;g of copolymer in deionized water, followed by mixing the solution with bafflers inside a cylindrical vessel. In mechanical tests, Sisal/Epoxy/Self-healing Microcapsules (SESM) composite demonstrates the highest elongation at break of 9.21% while Abaca/Epoxy/Self-healing Microcapsules composite exhibits the highest young’s modulus of 916.4&#xa0;MPa. Tensile strength of SESM composite leads with a maximum value of 79.56&#xa0;MPa. The highest value of flexural strength, flexural modulus and hardness was observed in the Sisal/Epoxy/Healing Agent (SESM) composite at 75.37&#xa0;MPa, 2.96 GPa and 97 Shore-D. Hemp/Epoxy/Self-healing Microcapsules (HESM) composite exhibits the highest impact strength at 22.3&#xa0;kJ/m<sup>2</sup>. The highest surface roughness of 0.58&#xa0;µm was observed in the SESM composite. The Sisal/Self-healing Microcapsules composite exhibited the highest fatigue resistance, withstanding 3312 cycles, followed closely by HESM (3167 cycles) and SE (3017 cycles) while SESM composite displayed the lowest creep strain across all time points, beginning at 0.022 (2000s) and reaching only 0.309 (15,000&#xa0;s). SESM composite exhibited the highest thermal conductivity at 27.65 W·m⁻<sup>1</sup>·K⁻<sup>1</sup>.</p>

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Melamine–formaldehyde self-healing microcapsules added sisal/hemp/abaca reinforced polymeric composites for mechanical and thermal explorations

  • 期刊论文

  • 发表日期：

    2026年1月12日

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  • Vijay Chaudhary,
  • Chanchal Ahlawat,
  • Sony Setiya,
  • Tushar Sharma,
  • P. Senthamaraikannan

摘要

Present research focused on the formation and effect of melamine–formaldehyde self-healing microcapsules on the mechanical performance of sisal, hemp and abaca reinforced epoxy composites. Self-healing microcapsules were formed by combining 3.12 g of melamine–formaldehyde and 0.75 g of copolymer in deionized water, followed by mixing the solution with bafflers inside a cylindrical vessel. In mechanical tests, Sisal/Epoxy/Self-healing Microcapsules (SESM) composite demonstrates the highest elongation at break of 9.21% while Abaca/Epoxy/Self-healing Microcapsules composite exhibits the highest young’s modulus of 916.4 MPa. Tensile strength of SESM composite leads with a maximum value of 79.56 MPa. The highest value of flexural strength, flexural modulus and hardness was observed in the Sisal/Epoxy/Healing Agent (SESM) composite at 75.37 MPa, 2.96 GPa and 97 Shore-D. Hemp/Epoxy/Self-healing Microcapsules (HESM) composite exhibits the highest impact strength at 22.3 kJ/m2. The highest surface roughness of 0.58 µm was observed in the SESM composite. The Sisal/Self-healing Microcapsules composite exhibited the highest fatigue resistance, withstanding 3312 cycles, followed closely by HESM (3167 cycles) and SE (3017 cycles) while SESM composite displayed the lowest creep strain across all time points, beginning at 0.022 (2000s) and reaching only 0.309 (15,000 s). SESM composite exhibited the highest thermal conductivity at 27.65 W·m⁻1·K⁻1.