In this study, two enhancement methods, i.e., toughen the epoxy matrix by commercially available nanosilica and enhance the interfaces of fibres and matrix by autoxidation of dopamine were applied together in carbon fibre reinforced polymer laminates with potential large-scale applicability. Significant enhancements were found for Mode I interlaminar fracture toughness and interlaminar shear strength with the combined addition of nanosilica and polydopamine in the laminates. The enhancement mechanism is proposed as well. Salt spray tests were applied in this study to simulate a marine environment for the laminates. Model I interlaminar fracture toughness and interlaminar shear strength both decreased under the simulated marine environment with an increase in immersion time, but the deterioration was significantly mitigated when nanosilica and polydopamine were added together with still much higher mechanical properties measured after 3 weeks of salt spray immersion than in neat laminate without salt spray immersion, providing promising evidence for maritime engineering applications of such laminates.

在这项研究中，两种增强方法，即通过可商购的纳米二氧化硅增韧环氧基质和通过多巴胺的自氧化增强纤维和基质的界面，一起被应用于碳纤维增强的聚合物层压板中，具有潜在的大规模适用性。发现在层合物中纳米二氧化硅和聚多巴胺的组合添加显着提高了模式I的层间断裂韧性和层间剪切强度。还提出了增强机制。在这项研究中应用了盐雾测试，以模拟层压板的海洋环境。在模拟海洋环境下，随着浸入时间的增加，模型I的层间断裂韧性和层间剪切强度均降低，