Multi-scale study of CNT and CNT-COOH reinforced epoxy composites: dispersion state, interfacial interaction vs mechanical properties

被引:9
作者
Yang, Haitang [1 ,2 ,3 ]
Yang, Yanping [1 ,2 ]
Liu, Yu [1 ,2 ]
He, Delong [4 ]
Bai, Jinbo [4 ]
机构
[1] Cent South Univ, Sch Aeronaut & Astronaut, Changsha, Hunan, Peoples R China
[2] Cent South Univ, Hunan Key Lab Adv Fibers & Composites, Changsha, Hunan, Peoples R China
[3] Cent South Univ, State Key Lab High Performance Complex Mfg, Changsha, Hunan, Peoples R China
[4] Univ Paris Saclay, Cent Supelec, CNRS, UMR 8579,Lab Mecan Sols Struct & Mat MSSMat, Gif Sur Yvette, France
基金
中国国家自然科学基金;
关键词
CNTs; composite; interphase; EELS; mechanical property; WALLED CARBON NANOTUBES; NANOCOMPOSITES; PERFORMANCE; FABRICATION; INTERPHASE; FIBERS;
D O I
10.1080/09276440.2020.1780556
中图分类号
TB33 [复合材料];
学科分类号
摘要
A precise evaluation of the influence of the dispersion and interface on the mechanical properties is the foundation to fabricate high-performance composites. In this work, original CNTs and carboxylic acid-modified CNTs (CNT-COOH) were chosen as the models, and a multi-scale study of CNTs reinforced epoxy composites was conducted, including the mechanical property test, the dispersion state evaluation and the interface analysis. The interface analysis was conducted by combining scanning transmission electron microscopy (STEM) and electron energy-loss spectroscopy (EELS). A wider interphase region was successfully identified in the CNT-COOH/epoxy than in the CNTs/epoxy composites. In addition, improved dispersion state has been achieved in the CNT-COOH/epoxy composite, which leads to a better mechanical performance for the CNT-COOH/epoxy composite. The successful characterization in multi-scale paves the way for a better understanding of the structure-property relationships in composites.
引用
收藏
页码:381 / 393
页数:13
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