Scholarlink

<p>The hydrothermal durability of hybrid epoxy composites reinforced simultaneously with surface-modified pineapple fiber, a PET core, and nutmeg husk biochar remains largely unexplored, particularly under prolonged warm water exposure. To address this gap, five composite formulations were fabricated. The unaged composite was designated as E24, while the remaining samples (EW0-EW3) were subjected to different aging conditions. Subsequently, the composites were evaluated for their mechanical properties, creep behavior, and water absorption characteristics, thermogravimetric, and morphological properties. Among all formulations, E24 exhibited the highest performance retention, with tensile strength of 131&#xa0;MPa, flexural strength of 145&#xa0;MPa, impact strength of 4.27&#xa0;J, and hardness of 81 Shore D. It also showed the lowest creep strain (0.0059–0.0084 at 5000 to15000 s) and minimal water uptake (1.26%), indicating superior dimensional stability and interfacial integrity. In contrast, EW3 showed the greatest degradation, with the highest water absorption (1.72%) and lowest mechanical retention. Thermogravimetric analysis confirmed the highest thermal stability for unaged E24, with Tonset of 305&#xa0;°C and Tmax of 367&#xa0;°C, while aged composites exhibited reduced degradation temperatures. SEM observations corroborated interfacial degradation trends. Overall, silane treatment effectively mitigated hydrothermal aging effects, establishing E24 as a durable, moisture-resistant composite suitable for automotive interior parts, marine panels, and building components exposed to humid or warm-water environments.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Impact of warm-water working condition on epoxy composites containing surface-modified pineapple fiber, polyethylene terephthalate (PET) core, and nutmeg husk biochar

  • 期刊论文

  • 发表日期：

    2026年5月1日

查看全文
  • E. S. Elumalai,
  • R. Asokan

摘要

The hydrothermal durability of hybrid epoxy composites reinforced simultaneously with surface-modified pineapple fiber, a PET core, and nutmeg husk biochar remains largely unexplored, particularly under prolonged warm water exposure. To address this gap, five composite formulations were fabricated. The unaged composite was designated as E24, while the remaining samples (EW0-EW3) were subjected to different aging conditions. Subsequently, the composites were evaluated for their mechanical properties, creep behavior, and water absorption characteristics, thermogravimetric, and morphological properties. Among all formulations, E24 exhibited the highest performance retention, with tensile strength of 131 MPa, flexural strength of 145 MPa, impact strength of 4.27 J, and hardness of 81 Shore D. It also showed the lowest creep strain (0.0059–0.0084 at 5000 to15000 s) and minimal water uptake (1.26%), indicating superior dimensional stability and interfacial integrity. In contrast, EW3 showed the greatest degradation, with the highest water absorption (1.72%) and lowest mechanical retention. Thermogravimetric analysis confirmed the highest thermal stability for unaged E24, with Tonset of 305 °C and Tmax of 367 °C, while aged composites exhibited reduced degradation temperatures. SEM observations corroborated interfacial degradation trends. Overall, silane treatment effectively mitigated hydrothermal aging effects, establishing E24 as a durable, moisture-resistant composite suitable for automotive interior parts, marine panels, and building components exposed to humid or warm-water environments.