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The mechanical properties and tribological behavior of epoxy resin composites modified by different shape nanofillers

机译：不同形状纳米填料改性环氧树脂复合材料的力学性能和摩擦学性能

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摘要

Mechanical properties and tribological behavior of epoxy resin (EP) and EP nanocomposites containing different shape nanofillers, such as spherical silica (SiO2), layered organo-modified montmor-illonite (oMMT) and oMMT-SiO{sub}2 composites, were investigated. The SiO{sub}2-oMMT composites were prepared by in situ deposition method and coupling agent modification, and transmission electron microscopy (TEM) analysis shows that spherical SiO{sub}2 is self-assembled on the surface of oMMT, which forms a novel layered-spherical nanostructure. The mechanical properties test results show that oMMT obviously improves the strength of EP and SiO{sub}2 enhances its toughness, but oMMT-SiO{sub}2 exhibits a synergistic effect on toughening and reinforcing EP simultaneously. A pin-on-disc rig was used to test friction and wear loss of pure EP and EP nanocomposites. The tribological test results prove that these nanofillers with different shapes play different roles for improving the wear resistance of EP nanocomposites. Morphologies of the worn surfaces were studied further by scanning electron microscopy (SEM) observations, and it was clarified that the EP and EP nanocomposites undergo similar wear mechanisms.
机译：研究了环氧树脂（EP）和包含不同形状的纳米填料（如球形二氧化硅（SiO2），层状有机改性蒙脱土（oMMT）和oMMT-SiO {sub} 2复合材料）的EP纳米复合材料的力学性能和摩擦学行为。 SiO {sub} 2-oMMT复合材料是通过原位沉积和偶联剂改性制备的，透射电镜分析表明球形SiO {sub} 2在oMMT表面是自组装的，形成了SiO_2。新颖的层状球形纳米结构。力学性能测试结果表明，oMMT明显提高了EP的强度，SiO {sub} 2提高了其韧性，但oMMT-SiO {sub} 2同时发挥了增韧EP的协同作用。销钉圆盘钻机用于测试纯EP和EP纳米复合材料的摩擦和磨损损失。摩擦学测试结果表明，这些形状不同的纳米填料在提高EP纳米复合材料的耐磨性方面起不同的作用。通过扫描电子显微镜（SEM）观察进一步研究了磨损表面的形貌，并阐明了EP和EP纳米复合材料的磨损机理相似。

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