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<p>The expanding application of light-emitting diodes (LEDs) in automotive lighting and outdoor displays has exposed the limitations of conventional epoxy resin encapsulants, including inadequate heat resistance, susceptibility to UV-induced yellowing, and vulnerability to damp-heat aging. Additionally, their non-biodegradability conflicts with the trends of green manufacturing. To address these challenges, this study proposes an environmentally robust alternative: a polybutylene fumarate (PBF)/N-vinylpyrrolidone (NVP) composite fabricated via melt blending. Systematic evaluations confirm its excellent overall performance. The incorporation of NVP raises the thermal decomposition temperature above 280&#xa0;°C, ensuring stable operation under high-temperature conditions. Optically, the composite maintains a transmittance of over 98.1% transmittance in the visible spectrum (350–800&#xa0;nm), and NVP effectively suppresses UV-induced yellowing, thus exhibiting superior UV aging resistance. Mechanically, it achieves a maximum bonding strength of 7.39&#xa0;MPa while retaining a tensile strength exceeding 3.29&#xa0;MPa, successfully balancing flexibility with structural integrity. By leveraging the synergistic effect between the biodegradable PBF matrix and the high-performance NVP modifier, this material overcomes the performance and environmental limitations of existing packaging materials, providing an innovative solution for the green packaging of high-reliability, long-lifespan LED devices.</p>

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A systematic study on preparation, properties, and UV aging stability of PBF-based composites for optoelectronic packaging

  • 期刊论文

  • 发表日期：

    2026年6月24日

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  • Siqian Ren,
  • Liang Wang,
  • Yidan Ma,
  • Yinwei Ma,
  • Shihao Yang,
  • Yongping Cao,
  • Jiaxin Han

摘要

The expanding application of light-emitting diodes (LEDs) in automotive lighting and outdoor displays has exposed the limitations of conventional epoxy resin encapsulants, including inadequate heat resistance, susceptibility to UV-induced yellowing, and vulnerability to damp-heat aging. Additionally, their non-biodegradability conflicts with the trends of green manufacturing. To address these challenges, this study proposes an environmentally robust alternative: a polybutylene fumarate (PBF)/N-vinylpyrrolidone (NVP) composite fabricated via melt blending. Systematic evaluations confirm its excellent overall performance. The incorporation of NVP raises the thermal decomposition temperature above 280 °C, ensuring stable operation under high-temperature conditions. Optically, the composite maintains a transmittance of over 98.1% transmittance in the visible spectrum (350–800 nm), and NVP effectively suppresses UV-induced yellowing, thus exhibiting superior UV aging resistance. Mechanically, it achieves a maximum bonding strength of 7.39 MPa while retaining a tensile strength exceeding 3.29 MPa, successfully balancing flexibility with structural integrity. By leveraging the synergistic effect between the biodegradable PBF matrix and the high-performance NVP modifier, this material overcomes the performance and environmental limitations of existing packaging materials, providing an innovative solution for the green packaging of high-reliability, long-lifespan LED devices.