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Improving interfacial properties of hierarchical reinforcement carbon fibers modified by graphene oxide with different bonding types
Composites Part A: Applied Science and Manufacturing ( IF 8.1 ) Pub Date : 2018-02-07 , DOI: 10.1016/j.compositesa.2018.02.009
Liu Liu , Fei Yan , Ming Li , Mengjie Zhang , Linghan Xiao , Lei Shang , Yuhui Ao

The deposition of graphene oxide (GO) onto carbon fibers (CF) surface to form a hierarchical reinforcement structure has been achieved via various bonding types: van der Waals forces, zwitterionic interactions and covalent bonds. The functional groups, surface elements, contents of introduced GO, surface structures, morphologies and wettability of GO-deposited CF were characterized by FT-IR, XPS, TGA, Raman, SEM and Dynamic contact angle meter, respectively. Covalently grafting GO onto CF (CF-c-GO) has been proved to be the most effective way to improve the interfacial properties. Compared with pristine CF, the flexural strength, interlaminar shear strength and interfacial shear strength of CF-c-GO composites were increased by 28.7%, 22.7% and 50.6%, respectively. The CF-GO hierarchical composites featured a stronger interfacial bonding as evidenced by the fracture surface analysis, which demonstrated the enhancement in interfacial properties of hierarchical thermoplastic composites.



中文翻译:

改善具有不同键合类型的氧化石墨烯改性的分层增强碳纤维的界面性能

石墨烯氧化物(GO)沉积在碳纤维(CF)表面上以形成分层的增强结构已通过多种键合类型实现:范德华力,两性离子相互作用和共价键。通过FT-IR,XPS,TGA,拉曼,SEM和动态接触角仪分别表征了GO沉积CF的官能团,表面元素,引入的GO含量,表面结构,形貌和润湿性。已经证明将GO共价接枝到CF(CF-c-GO)上是改善界面性能的最有效方法。与原始CF相比,CF-c-GO复合材料的弯曲强度,层间剪切强度和界面剪切强度分别提高了28.7%,22.7%和50.6%。

更新日期:2018-02-07
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