Hybrid composites have shown innumerable benefits to the research communities in terms of environmental friendliness and mechanical properties. This research study presents the mechanical characterization and moisture uptake of kenaf/pineapple leaf fiber‐reinforced polypropylene hybrid composites with several relative fiber ratios. A comparison was also made between nonhybrid and hybrid kenaf/pineapple leaf fiber‐reinforced composites to investigate the hybridization effect. In this work, the composite materials were fabricated via the hot compression technique. Mechanical tests were performed to obtain the tensile, flexural, and Charpy impact properties of nonhybrid and hybrid kenaf/pineapple leaf fiber‐based composites. The water absorption characteristics were then obtained by immersing the composite materials in the water until the saturation point was reached. The findings concluded that the mechanical properties and moisture uptake behaviors of the composites were improved through the hybridization. The hybrid composites with a relative fiber ratio of 25:75 were particularly promising with the improvement of 10.90% in tensile strength; 16.13% in flexural strength; and 6.80% in impact strength in both flatwise and edgewise orientations compared to nonhybrid kenaf‐based composites. Meanwhile, the diffusion coefficient of hybrid composites (25:75) was 56.12% lower than nonhybrid pineapple leaf fiber‐based composites. Thus, the results indeed demonstrated that the balance between mechanical properties and moisture sensitivity can be obtained through the hybridization of kenaf and pineapple leaf fiber in the composite materials.

中文翻译：

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洋麻/菠萝叶纤维增强聚丙烯杂化复合材料的力学性能和吸水率

在环境友好性和机械性能方面，杂化复合材料已为研究界显示了无数的利益。这项研究提出了洋麻/菠萝叶纤维增强聚丙烯杂化复合材料的机械特性和吸水率，具有多种相对纤维比率。还比较了非杂交的洋麻/菠萝叶纤维增强复合材料，以研究杂交效果。在这项工作中，复合材料是通过热压技术制造的。进行了机械测试以获得非混合和基于洋麻/菠萝叶纤维的复合材料的拉伸，弯曲和夏比冲击性能。然后通过将复合材料浸入水中直至达到饱和点来获得吸水特性。该发现得出结论，通过杂交改善了复合材料的机械性能和吸湿性能。相对纤维比率为25:75的杂化复合材料特别有希望，其抗张强度提高了10.90％。抗弯强度为16.13％; 与非混合洋麻基复合材料相比，在平面和边缘方向的冲击强度均为6.80％。同时，杂化复合材料（25:75）的扩散系数比非混合菠萝叶纤维基复合材料低56.12％。因此，