Investigation into the toughening mechanism of epoxy reinforced with multi-wall carbon nanotubes
Investigation into the toughening mechanism of epoxy reinforced with multi-wall carbon nanotubes
复制标题
多壁碳纳米管增强环氧树脂增韧机理研究
DOI：
10.1515/epoly-2015-0143
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发表时间：
2015-09
期刊：
影响因子：
3.7
通讯作者：
Wang Xia
中科院分区：
文献类型：
--
作者：
Li Xiaoyan;Zhang Wenjing;Zhai Shiwei;Tang Shawei;Zhou Xiaoqin;Yu Dengguang;Wang Xia
摘要本文研究了多壁碳纳米管（MWCNTs）对环氧树脂基体的增强增韧机理。加入少量MWCNTs后，环氧树脂的拉伸强度和断裂能（GIC）同时增加。采用扫描电子显微镜观察了单边缺口三点弯曲试样的断口形貌，采用透射电子显微镜观察了双边缺口四点弯曲试样的断裂过程。结果表明，MWCNTs在拉伸过程中发生了拔出和塑性孔洞的扩展，MWCNTs沿裂纹扩展路径发生了沿着断裂，MWCNTs周围的应力集中引发剪切带的理论模型是主要的增韧机制。而多壁碳纳米管的裂纹桥接和环氧树脂的塑性孔洞增长也有增韧作用。
Abstract This study reports the reinforcement and fracture toughening mechanism of pristine multi-walled carbon nanotubes (MWCNTs) on epoxy matrix. The tensile strength and fracture energy (GIC) of the epoxy polymer increased simultaneously upon the addition of a small amount of MWCNTs. The fracture surfaces of single-edge-notch three-point bending test specimens were analysed by scanning electron microscopy, and the double-notch four-point bending technique was used to investigate the fracture process by transmission electron microscopy, respectively. MWCNT pull-out and subsequent plastic void growth were found; meanwhile, fracture of MWCNTs was observed along the crack propagation path. The theoretical model of shearing band initiated by the stress concentrations around the MWCNTs is the dominant toughening mechanism. While the crack bridging of MWCNTs and the plastic void growth of epoxy also have a toughening effect.
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DOI：
--
发表时间：
1957
期刊：
--
影响因子：
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作者：
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通讯作者：
G. Irwin
DOI：
--
发表时间：
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--
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--
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A. Kinloch
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Paipetis, A. S.
DOI：
10.1061/(asce)nm.2153-5477.0000057
发表时间：
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期刊：
Journal of Nanomechanics and Micromechanics
影响因子：
--
作者：
A. Tounsi;A. Semmah;A. A. Bousahla-A.
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A. Tounsi;A. Semmah;A. A. Bousahla-A.
DOI：
10.1016/j.compositesa.2013.01.015
发表时间：
2013-06-01
影响因子：
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