Scholarlink

<p>Bamboo fibers are considered as promising candidates to replace synthetic fibers in polymer composites, due to their low density, important mechanical properties, and carbon neutrality. During their service life in exigent applications (e.g. structural components near engines, insulation panels, fuselage, and storage compartments), these fibers may be subjected to elevated temperatures that can alter their multiphysical properties. Interestingly, the high temperatures required during the manufacturing of fiber-reinforced thermoplastic composites also call for a thorough understanding of the physico-chemical, microstructural, and mechanical properties of these fibers over a wide temperature range. For this reason, the goal of this study was to examine the thermal aging effects on the physico-chemical, microstructural, sorption, and mechanical properties of bamboo fibers. The ultrastructural changes induced by thermal aging were analyzed using infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), and scanning electron microscope (SEM). The main results revealed that exposure to high temperatures, ranging from 60 to 220&#xa0;°C, induces the development of cracks, voids, and structural changes, including the occurrence of thermochemical reactions, which lead to a reduction in tensile strength. The sorption isotherms of bamboo fibers were also analyzed by dynamic vapor sorption (DVS) at different temperatures (20, 40, and 60&#xa0;°C). The findings indicated that the equilibrium moisture uptake increases with relative humidity, while the increase in temperature limits moisture absorption. Interestingly, the moisture diffusion kinetics were modelled using classical Fickian diffusion, the dual-stage Fickian approach, and the Langmuir-based model. Herein, the dual-stage Fick and Langmuir models accurately predict the experimental data, highlighting the anomalous diffusion in fibers at various environmental conditions. This research provides critical insights into the durability of bamboo fibers under different thermal conditions.</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

Thermal aging effects on microstructural, sorption and mechanical properties of bamboo fibers

  • 期刊论文

  • 发表日期：

    2025年12月24日

查看全文
  • Amine Fourari,
  • Mouad Chakkour,
  • Mohamed Ould Moussa,
  • Ismail Khay,
  • Tarak Ben Zineb

摘要

Bamboo fibers are considered as promising candidates to replace synthetic fibers in polymer composites, due to their low density, important mechanical properties, and carbon neutrality. During their service life in exigent applications (e.g. structural components near engines, insulation panels, fuselage, and storage compartments), these fibers may be subjected to elevated temperatures that can alter their multiphysical properties. Interestingly, the high temperatures required during the manufacturing of fiber-reinforced thermoplastic composites also call for a thorough understanding of the physico-chemical, microstructural, and mechanical properties of these fibers over a wide temperature range. For this reason, the goal of this study was to examine the thermal aging effects on the physico-chemical, microstructural, sorption, and mechanical properties of bamboo fibers. The ultrastructural changes induced by thermal aging were analyzed using infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), and scanning electron microscope (SEM). The main results revealed that exposure to high temperatures, ranging from 60 to 220 °C, induces the development of cracks, voids, and structural changes, including the occurrence of thermochemical reactions, which lead to a reduction in tensile strength. The sorption isotherms of bamboo fibers were also analyzed by dynamic vapor sorption (DVS) at different temperatures (20, 40, and 60 °C). The findings indicated that the equilibrium moisture uptake increases with relative humidity, while the increase in temperature limits moisture absorption. Interestingly, the moisture diffusion kinetics were modelled using classical Fickian diffusion, the dual-stage Fickian approach, and the Langmuir-based model. Herein, the dual-stage Fick and Langmuir models accurately predict the experimental data, highlighting the anomalous diffusion in fibers at various environmental conditions. This research provides critical insights into the durability of bamboo fibers under different thermal conditions.