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<p>Polymer foam composites for sound absorption with eco-friendly attributes have gained significant attention in sustainable materials research. This study investigates the impact of ultraviolet (UV) irradiation on the morphological, mechanical, and acoustical properties of bio-epoxy (BE) and synthetic epoxy (SE) foam composites, incorporating wood flakes as fillers at varying loadings (0–20 wt%). BE, derived from waste cooking oil, demonstrated superior resilience to UV exposure compared to SE, maintaining better pore structure, mechanical stability, and sound absorption performance. The results show that after 6000&#xa0;h of UV exposure, BE composites retained 12–18% higher sound absorption coefficient (α = 0.62–0.78) than SE composites (α = 0.50–0.66) at 3000&#xa0;Hz after 6000&#xa0;h of UV exposure, demonstrating superior UV resilience. At 6000&#xa0;Hz, SE outperformed BE (α = 0.45 vs. 0.35) as a result of structural degradation in BE at higher frequencies, attributed to the natural stabilizing properties of bio-based additives. This study proves that BE foam composites offer improved durability and acoustic performance under prolonged UV exposure, positioning them as promising materials for sustainable acoustics&#xa0;applications.</p>

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Morphological and acoustical characterization of UV-irradiated foam composites from cooking oil and wood flake

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月4日

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  • Anika Zafiah M. Rus,
  • Hanani Abd Wahab,
  • Yazid Saif,
  • Noraini Marsi,
  • M. Taufiq Zaliran,
  • M. Hafizh Alamshah,
  • Ita Mariza,
  • Shaiqah M. Rus,
  • Sami Al-Alimi,
  • Wenbin Zhou

摘要

Polymer foam composites for sound absorption with eco-friendly attributes have gained significant attention in sustainable materials research. This study investigates the impact of ultraviolet (UV) irradiation on the morphological, mechanical, and acoustical properties of bio-epoxy (BE) and synthetic epoxy (SE) foam composites, incorporating wood flakes as fillers at varying loadings (0–20 wt%). BE, derived from waste cooking oil, demonstrated superior resilience to UV exposure compared to SE, maintaining better pore structure, mechanical stability, and sound absorption performance. The results show that after 6000 h of UV exposure, BE composites retained 12–18% higher sound absorption coefficient (α = 0.62–0.78) than SE composites (α = 0.50–0.66) at 3000 Hz after 6000 h of UV exposure, demonstrating superior UV resilience. At 6000 Hz, SE outperformed BE (α = 0.45 vs. 0.35) as a result of structural degradation in BE at higher frequencies, attributed to the natural stabilizing properties of bio-based additives. This study proves that BE foam composites offer improved durability and acoustic performance under prolonged UV exposure, positioning them as promising materials for sustainable acoustics applications.