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Effect of water absorption on the mechanical properties of nano-filler reinforced epoxy nanocomposites

机译:吸水率对纳米填料增强环氧纳米复合材料力学性能的影响

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摘要

This study aimed to investigate the effect of water absorption on the mechanical properties of nano-filler reinforced epoxy nanocomposites as well as to study the influence of different types of nano-fillers such as nano-clay platelets, halloysite nanotubes (HNTs) and nano-silicon carbide (n-SiC) particles on the water absorption behaviour of epoxy based nanocomposites. Results indicated that the addition of nano-fillers into epoxy matrix was found to decrease both water uptake and diffusivity compared to unfilled epoxy. Flexural strength and modulus of epoxy based nanocomposites were found to decrease due to the water absorption. However, the addition of nano-fillers enhanced the flexural strength and modulus of nanocomposites compared to wet unfilled epoxy. Surprising, fracture toughness and impact strength of all types of nanocomposites were found to increase after exposing to water. The presence of nano-fillers increased both fracture toughness and impact strength of nanocomposites compared to wet neat epoxy.
机译:这项研究旨在研究吸水率对纳米填料增强的环氧纳米复合材料力学性能的影响,并研究不同类型的纳米填料(如纳米粘土薄片,埃洛石纳米管(HNTs)和纳米碳纳米管)的影响。碳化硅(n-SiC)颗粒对环氧基纳米复合材料的吸水行为。结果表明,与未填充的环氧树脂相比,向环氧树脂基质中添加纳米填料可降低吸水率和扩散率。发现环氧基纳米复合材料的抗弯强度和模量由于吸水而降低。但是,与湿未填充的环氧树脂相比,纳米填料的添加增强了纳米复合材料的弯曲强度和模量。令人惊讶的是,发现所有类型的纳米复合材料暴露于水后其断裂韧性和冲击强度都会增加。与湿法纯环氧树脂相比,纳米填料的存在增加了纳米复合材料的断裂韧性和冲击强度。

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