Owing to their excellent physical and mechanical properties, polymer-matrix hybrid nanocomposites have found extensive applications in various fields. In this study, different parameters such as materials characteristics and processing parameters are investigated and optimally selected for composite fabrication. The purpose of selecting the optimal parameters and fabricating different types of composite samples was to achieve simultaneous and high improvement in various mechanical properties of epoxy resin. As a result, the process of this study was designed in such a way that by making epoxy-matrix composites reinforced with carbon nanotubes (CNTs) in different CNT weight percentages (0.1, 0.5, and 1 wt%) via solution casting method and using optimal values for material characteristics and processing parameters, the improvement of epoxy mechanical properties for each CNT weight percentage was investigated. Results indicated that the highest improvement in mechanical properties of CNT/epoxy composite was observed in 0.5 wt% CNT sample which had a tensile strength of 61 MPa and Young's modulus of 1.8 GPa. Then, CNT/epoxy composites with the highest improvement in mechanical properties were selected to fabricate the matrix phase of glass fiber/CNT/epoxy hybrid composite. Hybrid composite samples with fiber to matrix ratio of 45:55 were fabricated via the hand lay-up technique. To achieve maximum improvement of mechanical properties for the hybrid composite, the optimal parameters were selected which led to the maximum tensile strength of 300 MPa and Young's modulus of 24.9 GPa. Mechanical properties of the glass fiber/CNT/epoxy hybrid composites showed an identical trend to the CNT/epoxy composite. Moreover, all the fracture mechanisms of CNT/epoxy and glass fiber/CNT/epoxy composites were precisely investigated by scanning electron microscopy.

由于其优异的物理和机械性能，聚合物-基体杂化纳米复合材料在各个领域都有广泛的应用。在这项研究中，研究了不同的参数，如材料特性和加工参数，并为复合材料制造进行了最佳选择。选择最佳参数并制备不同类型的复合材料样品的目的是实现环氧树脂各种力学性能的同步和高度提高。因此，本研究的过程设计为通过溶液浇铸方法制造用碳纳米管 (CNT) 增强的环氧基质复合材料，其碳纳米管重量百分比（0.1、0.5 和 1 重量％）通过溶液浇铸方法并使用材料特性和加工参数的最佳值，研究了每个 CNT 重量百分比的环氧树脂机械性能的改进。结果表明，在具有 61 MPa 拉伸强度和 1.8 GPa 杨氏模量的 0.5 wt% CNT 样品中观察到 CNT/环氧树脂复合材料的机械性能的最大改进。然后，选择机械性能改进最大的碳纳米管/环氧树脂复合材料来制造玻璃纤维/碳纳米管/环氧树脂混合复合材料的基体相。通过手糊技术制造了纤维与基体比为 45:55 的混合复合材料样品。为了最大限度地提高混合复合材料的机械性能，选择了最佳参数，使最大拉伸强度为 300 MPa，杨氏模量为 24.9 GPa。玻璃纤维/碳纳米管/环氧树脂杂化复合材料的机械性能与碳纳米管/环氧树脂复合材料显示出相同的趋势。此外，通过扫描电子显微镜精确研究了碳纳米管/环氧树脂和玻璃纤维/碳纳米管/环氧树脂复合材料的所有断裂机制。