Evaluation of Mechanical and Thermal Properties of Jute and Ramie Reinforced Epoxy-based Hybrid Composites

ABSTRACT

In this study, the hybrid composites were prepared from ramie and jute natural as reinforcement, an epoxy polymer as a matrix, and SiC and cellulose as fillers via hand layup process. Mechanical and thermogravimetric analysis was carried out to quantify the effect of reinforcement on hybrid composites and evaluate their mechanical properties and thermal stability. The mechanical tests showed improvement in tensile and flexural strength of the hybrid composites with increasing content of bidirectional woven ramie fiber, and decreased with increased content of chopped jute fiber. The Izod impact test results revealed that chopped jute fiber form could resist more impact load when compared with woven ramie mat fibers. Hence, the impact energy increased with the increased content of chopped jute fiber in the hybrid composites. The surface morphological analysis of hybrid composites revealed the fiber pullout, cracks, and other failure modes of the hybrid composite using SEM analysis.

摘要

本研究以天然苎麻和黄麻为增强材料,环氧树脂为基体,碳化硅和纤维素为填料,采用手糊工艺制备了混杂复合材料. 进行了力学和热重分析,以量化增强体对混杂复合材料的影响,并评估其力学性能和热稳定性. 力学性能测试表明,随着双向机织苎麻纤维含量的增加,混杂复合材料的拉伸和弯曲强度提高,而随着短切黄麻纤维含量的增加,混杂复合材料的拉伸和弯曲强度降低. Izod冲击试验结果表明,与编织苎麻毡纤维相比,短切黄麻纤维形式能够抵抗更大的冲击载荷. 因此,随着混杂复合材料中短切黄麻纤维含量的增加,冲击能增加. 混杂复合材料的表面形态分析通过SEM分析揭示了混杂复合材料的纤维拉拔、裂纹和其他失效模式.

KEYWORDS:

• natural fiber
• hybrid composites
• silicon carbide
• ramie
• thermal stability
• jute
• mechanical properties