The bonding performances of carbon nanotube (CNT)-reinforced epoxy adhesively bonded joints on steel substrates
The bonding performances of carbon nanotube (CNT)-reinforced epoxy adhesively bonded joints on steel substrates
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DOI：
10.1016/j.porgcoat.2021.106407
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发表时间：
2021-07-01
影响因子：
6.6
通讯作者：
Huang, Ying
中科院分区：
文献类型：
--
作者：
Zhang, Dawei;Huang, Ying
碳纳米管（CNTs）被认为是一种很有前途的颗粒增强体，可以将先进的性能和特性引入到环氧树脂纳米复合材料中。采用单搭接剪切（SLS）试验研究了碳纳米管增强环氧树脂胶接接头与钢基体的粘接性能。的粘结性能（包括粘结强度，断裂应变，韧性，和故障模式）进行了研究与三个粘合剂厚度（1毫米，0.5毫米，和0.25毫米）和三个CNT重量分数（0%，0.375%，和0.75%）。实验结果表明，较薄的胶层和较高的碳纳米管添加量可以显着提高连接性能和修改CNT增强环氧树脂粘接接头的失效模式。然而，随着CNT重量分数的增加，粘合剂厚度的影响变得不那么显著。此外，CNT增强环氧树脂的塑性行为，CNT拔出，和CNT的聚集观察通过扫描电子显微镜（SEM）图像分析的CNT增强环氧树脂粘接接头的断裂表面上，表明潜在的有效性的CNT增强。
Carbon nanotubes (CNTs) are generally considered as a promising particle reinforcement of incorporating advanced properties and characteristics into epoxy nanocomposites. This paper investigated the bonding performances of CNT-reinforced epoxy adhesively bonded joints on steel substrates using the single lap shear (SLS) tests. The bonding performances (including bonding strength, fracture strain, toughness, and failure mode) were studied with three adhesive thicknesses (1 mm, 0.5 mm, and 0.25 mm) and three CNT weight fractions (0%, 0.375%, and 0.75%). The experimental results indicated that thinner bondlines and higher CNT additions could significantly improve the bonding performances and modify the failure mode of CNT-reinforced epoxy adhesively bonded joints. However, the effects of adhesive thickness became less significant with the increase of CNT weight fractions. In addition, the plastic behaviour of CNT-reinforced epoxy, CNTs pulling-out, and the aggregation of CNTs were observed by scanning electron microscopy (SEM) image analysis on the fracture surfaces of CNT-reinforced epoxy adhesively bonded joints, indicating the potential effectiveness of the CNT reinforcement.