Applications of natural reinforcements such as pineapple leaf fiber (PALF) have increased considerably due to unlimited resources from the nature. Hybridization of fiber reinforced composites promoted various advantages such as low weight, low cost, biodegradable and eco-friendly products having unique properties. This study aims to assess the effect of stacking sequences on the moisture absorption characteristics and mechanical properties of hybrid PALF (P) and glass fiber (G) reinforced polymer composites. The accelerated moisture absorption test as well as flexural and tensile experiments were conducted on the pure PALF and the hybrid PALF/glass fiber reinforced epoxy composites with three different stacking sequences of PGPG, GPPG and PGGP. The fractured surface of the specimens was analyzed using a scanning electron microscope (SEM). The Fickian diffusion theory was applied to characterize the composite moisture absorption behavior. Results indicated that the pure PALF laminated composite absorbs a higher percentage of moisture than the hybrid composites, which causes the higher degradation of the mechanical properties of pure PALF composite compared to the hybrid composites. The stacking sequences of the PALF and the glass fiber have significant influence on the diffusion rate of water into the composites. The results of the tension and the flexural experiments showed that the hybrid composites have superior mechanical properties compared to the non-hybrid fiber composite with the percentage increases of the flexural and the tensile strength up to 119 % and 153 %, respectively. The hybrid composite with alternate stacking configuration, i.e. PGPG, revealed the highest flexural and tensile strengths of 170.13 MPa and 119.21 MPa, respectively. In addition, the SEM observation displayed better interfacial bonding between the fiber and the matrix in the hybrid composite with PGPG stacking sequence compared to the other specimens.

由于来自自然界的无限资源，诸如菠萝叶纤维（PALF）之类的天然增强材料的应用已大大增加。纤维增强复合材料的杂交促进了各种优势，例如重量轻，成本低，可生物降解且具有独特性能的环保产品。这项研究旨在评估堆叠顺序对混合PALF（P）和玻璃纤维（G）增强聚合物复合材料的吸湿特性和机械性能的影响。加速吸水率测试以及弯曲和拉伸实验是对纯PALF和具有三种不同堆叠顺序的PGPG，GPPG和PGGP的PALF /玻璃纤维增​​强混合环氧复合材料进行的。使用扫描电子显微镜（SEM）分析样品的断裂表面。Fickian扩散理论用于表征复合材料的吸湿性能。结果表明，纯PALF层压复合材料比杂化复合材料吸收更高的水分含量，这导致纯PALF复合材料的机械性能比杂化复合材料更高。PALF和玻璃纤维的堆叠顺序对水向复合物中的扩散速率有重要影响。拉伸和弯曲实验的结果表明，与非混合纤维复合材料相比，该杂化复合材料具有更好的机械性能，其抗弯强度和抗拉强度的增加百分比分别高达119％和153％。具有备用堆叠配置的混合复合材料，即PGPG，分别显示出170.13 MPa和119.21 MPa的最高弯曲强度和拉伸强度。此外，与其他样品相比，具有PGPG堆积顺序的杂化复合材料在SEM和SEM中显示出更好的纤维与基质之间的界面结合。