Epoxy biocomposites were prepared using acid-, base- and silane-treated novel Caryota urens natural fibres (CUFs). The primary aim of this research is to reveal a better surface treatment method to achieve improved mechanical, thermal and fatigue properties of Caryota fibre epoxy composite system. The composites were prepared using hand layup method and post cured at 120 °C for 48 h. The tensile, flexural and impact results show that the silane surface–treated Caryota urens fibre–reinforced epoxy composite possesses improved mechanical properties than the base- and acid-treated Caryota urens fibres in the epoxy composite. Similarly, the inter-laminar shear strength (ILSS) of silane-treated Caryota urens–reinforced epoxy composite gives the highest value of 28 MPa. The TGA shows a large mass loss for both acid- and base-treated Caryota urens epoxy composites whereas the silane-treated Caryota urens in epoxy composite retains the thermal stability. The fatigue behaviour of silane surface–modified Caryota urens epoxy composite shows the highest fatigue life cycle of 18,315 for 25% of maximum tensile stress. The SEM micrographs show improved adhesion for silane-treated CUF than those treated with acid and base. This Caryota urens fibre–reinforced epoxy composite could be used in automobile body parts, domestic appliances, defence products and lightweight mini-aircrafts.

使用酸，碱和硅烷处理的新型Caryota urens天然纤维（CUF）制备环氧生物复合材料。这项研究的主要目的是揭示一种更好的表面处理方法，以改善Caryota纤维环氧复合材料体系的机械，热和疲劳性能。使用手糊法制备复合材料，并在120°C下固化48小时。拉伸，挠曲和冲击结果表明，硅烷表面处理的Caryota urens纤维增强环氧复合材料比环氧树脂复合物中的碱处理和酸处理的Caryota urens纤维具有改善的机械性能。同样，硅烷处理的Caryota urens的层间剪切强度（ILSS）–增强环氧复合材料的最高值为28 MPa。TGA对酸和碱处理的Caryota urens环氧复合材料均显示出较大的质量损失，而环氧复合材料中的硅烷处理的Caryota urens保留了热稳定性。硅烷表面改性的Caryota urens环氧复合材料的疲劳行为显示最大疲劳寿命为18,315，最大拉伸应力的25％。SEM显微照片显示，与用酸和碱处理的硅烷相比，硅烷处理的CUF的粘合性得到了改善。这种Caryota urens纤维增强的环氧复合材料可用于汽车车身零件，家用电器，国防产品和轻型微型飞机。