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<p>This study examines the mechanical, thermal, and long-term stability of hybrid fiber-reinforced sustainable composites developed for thermal interface material (TIM) applications. The composite comprising aluminized glass fiber, bamboo fiber, and bagasse-derived carbon quantum dots (CQDs) was conditioned at 40&#xa0;°C for 7-30 days to assess performance below the glass transition temperature. After 14 days of conditioning, the material retained high mechanical strength (165&#xa0;MPa flexural and 147&#xa0;MPa tensile), with limited fatigue degradation, sustaining nearly 19,500 cycles at 25% ultimate tensile strength. Thermal conductivity decreased moderately to 0.37&#xa0;W/mK, while dielectric stability remained acceptable (permittivity = 3.85; dielectric loss = 0.715). These results demonstrate that controlled thermal conditioning preserves the composite’s mechanical and functional integrity, supporting its suitability as a durable and efficient TIM for electronic, renewable energy, and automotive applications.</p>

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The Impact of Surface Treatment and Service Temperature Condition on the Performance of a Sustainable Composite Containing Aluminized Glass, Bamboo Fiber, and Bagasse Carbon Quantum Dots

  • 期刊论文

  • 发表日期：

    2026年2月21日

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  • S. Ramu,
  • N. Senthilkumar,
  • B. Deepanraj

摘要

This study examines the mechanical, thermal, and long-term stability of hybrid fiber-reinforced sustainable composites developed for thermal interface material (TIM) applications. The composite comprising aluminized glass fiber, bamboo fiber, and bagasse-derived carbon quantum dots (CQDs) was conditioned at 40 °C for 7-30 days to assess performance below the glass transition temperature. After 14 days of conditioning, the material retained high mechanical strength (165 MPa flexural and 147 MPa tensile), with limited fatigue degradation, sustaining nearly 19,500 cycles at 25% ultimate tensile strength. Thermal conductivity decreased moderately to 0.37 W/mK, while dielectric stability remained acceptable (permittivity = 3.85; dielectric loss = 0.715). These results demonstrate that controlled thermal conditioning preserves the composite’s mechanical and functional integrity, supporting its suitability as a durable and efficient TIM for electronic, renewable energy, and automotive applications.