Preparation carbon nanotube-decorated carbon fibers under low pressure for epoxy-based unidirectional hierarchical composites with enhanced interlaminar shear strength

Polymer Testing

Chengguo Wang¹  Qifen Wang¹  Shunsheng Su¹  Quan Gao¹  Zhiqiang Yao²  Yanxiang Wang³  Ziming Ma³  Meijie Yu³  Jianjie Qin³  Huazhen Wei³ 

[1] Carbon Fiber Engineering Research Center, School of Material Science and Engineering, Shandong University, Jinan, 250061, China;Corresponding author. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, 250061, China.;Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, 250061, China;

关键词: Carbon fibers;    Carbon nanotubes;    Low pressure;    Chemical vapor deposition (CVD);    Interlaminar shear strength (ILSS);   

DOI  :  

来源: DOAJ

【 摘 要 】

Multi-walled carbon nanotubes (CNTs) were grown in-situ on the surface of carbon fibers (CFs) at low pressure by a vertical chemical vapor deposition (CVD) reactor. The surface of CFs was modified by electrochemical anodization, and the growth morphology and other properties of CNTs were analyzed by detailed techniques. The CNT-grown CF reinforced unidirectional hierarchical composite material based on the epoxy resin was prepared. The interlaminar shear strength (ILSS) indicates that the maximum strength of the composites reaches 108 MPa after the CNTs are grown on the CF surface with a 25.2% increase than that of the desized CF composites. The fracture surface of composites was observed by scanning electron microscopy (SEM) to further understand the interfacial fracture behavior and enhancement mechanism of CNTs-CF/epoxy composites. The significant improvement in the overall performance of the hierarchical composites can be attributed to the increased adhesion of the interface between the fibers and the resin. The presence of CNTs can restrict the molecular movement of the resin and achieve a strong anchoring interaction, thereby increasing the strength and toughness of the composites and reducing the stress concentration between the layers.

【 授权许可】

Unknown