Study on Effect of Fiber Loading Natural Coccinia Grandis Fiber Epoxy Composite

ABSTRACT

Synthetic fiber-reinforced composites are difficult to be disposed of after their intended use due to their non-biodegradable nature. Natural plant fibers, which are renewable and fully biodegradable, are, therefore, ideal alternatives that can replace synthetic fibers. In this research paper, the application of biodegradable Coccinia grandis fiber-reinforced epoxy bio composite is investigated. The randomly oriented Coccinia grandis fiber-reinforced bio composites were prepared by compression molding with 10%, 20%, 30%, 40%, and 50% fiber weight. Tensile, flexural, and impact tests were used to determine the composite’s mechanical properties, and Field Emission Scanning Electron Microscopy (FESEM) was used to understand the interfacial bonding. The obtained results revealed that 40% fiber weight could produce Coccinia grandis fiber-reinforced bio composite with the highest tensile strength, impact strength, and interfacial adhesion among all the prepared composites, whereas 50% fiber weight could make the bio composite with the highest flexural strength. The results show that the Coccinia grandis fiber-reinforced bio composites seem to have potential applications in automobile, construction, interiors, etc.

摘要

天然纤维增强聚合物复合材料是绿色复合材料的例子. 从化石中提取的聚合物成分中含有挥发性有机化合物. 以蓖麻油为原料制备的聚氨酯是一种可再生资源，不含挥发性有机物，具有生物降解性. 本研究旨在评估以南洋杉松子壳植物纤维为增强体，以蓖麻油衍生之聚胺酯（PU）为基质之复合材料之物理、力学及热性能. 用20%、35%和50%的PU制备了复合材料. 用弯曲强度、热重分析（TGA）和傅立叶变换红外光谱（FTIR）对100%PU（用作对照样品）的性能进行了评价. 通过体积密度、吸水率、厚度膨胀率、弯曲强度、TGA、FTIR和扫描电子显微镜（SEM）等方法对复合材料面板的性能进行了评价. PU含量为35%的复合材料抗弯强度为51.55mpa，密度为1018kg/m³, 吸水率为7.95%，24小时以上的溶胀率为5.36%，与类似的松子壳和热固性聚合物复合材料相比，这些结果更好. 研究了界面处的纤维-基体粘结在复合材料增强体中的作用.

KEYWORDS:

• Natural fiber
• epoxy coating
• fiber/matrix bond
• mechanical properties
• electron microscopy
• compression molding

关键词:

• 复合材料
• 聚氨酯
• 蓖麻油
• 松子壳
• 机械性能
• 纤维/基体界面

Declaration of interests

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Acknowledgments

No acknowledgments

Additional information

Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.