Abstract The damage self-sensing and strain monitoring of glass-reinforced epoxy composites impregnated with graphene nanoplatelets (GNPs) and multiwalled carbon nanotubes (MWCNTs) were investigated. Hand lay-up and vacuum bagging methods were used to fabricate the composite. Mechanical stirrer, high shear mixer, and ultrasonic probe were used to mix the nanofiller and epoxy. The loadings of the nanofiller used were 0.5, 1.5, 3, and 5 wt%. The specimens were tested using in situ electromechanical measurements under mechanical tests. The results show that the type and weight content of the nanofiller affect the electrical properties, damage self-sensing behaviour, and mechanical properties of the composites. The electrical conductivity of the GNP-glass and MWCNT-glass composites increased with nanofiller content. The tensile and flexural strengths of the composite improved with the addition of GNP and MWCNT nanofillers from 0.5 to 3 wt%. The 3 wt% nanofiller loading for GNP and MWCNT produces better mechanical–electrical performance. Field emission scanning electron microscopy revealed the dispersion of GNP and MWCNT nanofillers in the composites.

中文翻译：

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浸渍石墨烯纳米片和多壁碳纳米管的玻璃增强环氧树脂复合材料的损伤自传感和应变监测

摘要 研究了浸渍石墨烯纳米片（GNPs）和多壁碳纳米管（MWCNTs）的玻璃增强环氧树脂复合材料的损伤自传感和应变监测。手糊和真空袋方法用于制造复合材料。机械搅拌器、高剪切混合器和超声波探头用于混合纳米填料和环氧树脂。所用纳米填料的负载量为 0.5、1.5、3 和 5 wt%。在机械测试下使用原位机电测量对样品进行测试。结果表明，纳米填料的类型和重量含量会影响复合材料的电性能、损伤自感应行为和力学性能。GNP-玻璃和MWCNT-玻璃复合材料的电导率随着纳米填料含量的增加而增加。添加 0.5 至 3 wt% 的 GNP 和 MWCNT 纳米填料后，复合材料的拉伸和弯曲强度得到改善。GNP 和 MWCNT 的 3 wt% 纳米填料负载可产生更好的机械-电气性能。场发射扫描电子显微镜显示 GNP 和 MWCNT 纳米填料在复合材料中的分散。