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<p>This study investigated the thermal and dynamical performance of carbon/ramie fiber-reinforced copper oxide epoxy composites, focusing on their mechanical strength, thermal stability, and structural integrity for thermal energy storage applications. The mechanical properties showed that the optimized hybrid composite exhibited tensile strength of 169.32&#xa0;MPa, flexural strength of 174.91&#xa0;MPa, and impact energy absorption is 31&#xa0;J, demonstrating superior performance compared to conventional fiber-reinforced composites. Scanning electron microscopy analysis identified failure modes such as fiber pull-out and matrix cracking, which influenced mechanical behavior. Thermal characterization indicated that the composite had thermal conductivity values between 0.87 and 2.97 W m<sup>–1</sup> K<sup>–1</sup> and a coefficient of linear thermal expansion ranging from 1.13 × 10⁻5 to 2.37 × 10⁻5/°C, making it suitable for thermal management applications. Heat deflection temperature analysis showed that the material maintained its structural integrity up to 187&#xa0;°C. Dynamic mechanical analysis revealed that the storage modulus remained around 3000&#xa0;MPa at room temperature before decreasing in the glass transition region near 130&#xa0;°C. Loss modulus and tan delta analyses indicated a well-balanced damping behavior, which is essential for applications requiring vibration resistance. These findings demonstrated the potential of carbon/ramie fiber-reinforced copper oxide epoxy composites for thermal energy storage applications, where high mechanical stability, thermal performance, and structural durability are required.</p>

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Thermal and dynamical performance of carbon/ramie fiber-reinforced copper oxide epoxy composites: prospects for biomedical and thermal energy storage applications

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • Raja Thandavamoorthy,
  • Yuvarajan Devarajan

摘要

This study investigated the thermal and dynamical performance of carbon/ramie fiber-reinforced copper oxide epoxy composites, focusing on their mechanical strength, thermal stability, and structural integrity for thermal energy storage applications. The mechanical properties showed that the optimized hybrid composite exhibited tensile strength of 169.32 MPa, flexural strength of 174.91 MPa, and impact energy absorption is 31 J, demonstrating superior performance compared to conventional fiber-reinforced composites. Scanning electron microscopy analysis identified failure modes such as fiber pull-out and matrix cracking, which influenced mechanical behavior. Thermal characterization indicated that the composite had thermal conductivity values between 0.87 and 2.97 W m–1 K–1 and a coefficient of linear thermal expansion ranging from 1.13 × 10⁻5 to 2.37 × 10⁻5/°C, making it suitable for thermal management applications. Heat deflection temperature analysis showed that the material maintained its structural integrity up to 187 °C. Dynamic mechanical analysis revealed that the storage modulus remained around 3000 MPa at room temperature before decreasing in the glass transition region near 130 °C. Loss modulus and tan delta analyses indicated a well-balanced damping behavior, which is essential for applications requiring vibration resistance. These findings demonstrated the potential of carbon/ramie fiber-reinforced copper oxide epoxy composites for thermal energy storage applications, where high mechanical stability, thermal performance, and structural durability are required.