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<p>Composite materials are receiving growing attention due to their diverse industrial applications and environmentally friendly characteristics. This study presents the synthesis of an innovative polyvinyl alcohol-based composite reinforced with cobalt ferrite nanoparticles derived from grape peel extract. The aim is to explore the potential of such composites as alternatives to synthetic materials in sectors such as the aerospace, construction, automotive, and marine industries. Polyvinyl alcohol served as the matrix, while cobalt ferrite, synthesized from grape peel extract and crystallized through heat treatment at 400&#xa0;°C, was used as the reinforcement. Among the prepared samples, the composite containing 1% volume of cobalt ferrite exhibited the best mechanical performance, with a tensile strength of 62&#xa0;MPa (a 37.8% increase compared to the unreinforced sample), a tensile modulus of 2.1 GPa (40% higher), a tear strength of 33&#xa0;N/mm, and a Shore-D hardness of 33. In contrast, the composite with the highest cobalt ferrite content showed the lowest specific wear rate (0.018&#xa0;mm³/N·m), a coefficient of friction of 0.27, thermal conductivity of 0.65&#xa0;W/m·K, and the highest dielectric permittivity (5.0) and dielectric loss (0.78). It also exhibited a contact angle of 68°, indicating improved hydrophobicity. These results demonstrate the effectiveness of this natural filler-reinforced composite for use in various high-performance engineering applications.</p>

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Biosynthesized CoFe2O4 from grape peel extract and polyvinyl alcohol-based composite: evaluation and characterization

  • 期刊论文

  • 发表日期：

    2025年7月17日

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  • B. R. Tapas Bapu,
  • M. S. Maharajan,
  • Anusha N,
  • S. Ramkumar,
  • S. Suvitha,
  • S. Joshua Kumaresan

摘要

Composite materials are receiving growing attention due to their diverse industrial applications and environmentally friendly characteristics. This study presents the synthesis of an innovative polyvinyl alcohol-based composite reinforced with cobalt ferrite nanoparticles derived from grape peel extract. The aim is to explore the potential of such composites as alternatives to synthetic materials in sectors such as the aerospace, construction, automotive, and marine industries. Polyvinyl alcohol served as the matrix, while cobalt ferrite, synthesized from grape peel extract and crystallized through heat treatment at 400 °C, was used as the reinforcement. Among the prepared samples, the composite containing 1% volume of cobalt ferrite exhibited the best mechanical performance, with a tensile strength of 62 MPa (a 37.8% increase compared to the unreinforced sample), a tensile modulus of 2.1 GPa (40% higher), a tear strength of 33 N/mm, and a Shore-D hardness of 33. In contrast, the composite with the highest cobalt ferrite content showed the lowest specific wear rate (0.018 mm³/N·m), a coefficient of friction of 0.27, thermal conductivity of 0.65 W/m·K, and the highest dielectric permittivity (5.0) and dielectric loss (0.78). It also exhibited a contact angle of 68°, indicating improved hydrophobicity. These results demonstrate the effectiveness of this natural filler-reinforced composite for use in various high-performance engineering applications.