Mechanical, thermal and interfacial performances of carbon fiber reinforced composites flavored by carbon nanotube in matrix/interface. (1st January 2017)

• Record Type: Journal Article
• Authors: Zhao, Zhongbo; Teng, Kunyue; Li, Nan; Li, Xiaojie; Xu, Zhiwei; Chen, Lei; Niu, Jiarong; Fu, Hongjun; Zhao, Lihuan; Liu, Ya
• Is Part Of: Composite structures. Volume 159(2017)
• Page Start: 761
• Page End: 772
• Publication Date: 2017-01-01
• Subjects: Carbon nanotubes -- Energy dispersive X-ray spectroscopy -- Interfacial shear strength -- Gradient interface layer; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2016.10.022
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: The introduction of carbon nanotubes (CNTs) into fiber-reinforced polymer composites has been achieved predominantly via two routes: mixing CNTs entirely throughout the matrix (matrix modification) or attaching CNTs onto reinforcing fibers (interface modification). We studied unidirectional carbon fiber/epoxy composites where CNTs were introduced to enhance the hierarchical composites by two alternative strategies: mixing into the epoxy or attaching onto carbon fibers by electrophoretic deposition. Single-fiber fragmentation test combined with energy dispersive X-ray spectroscopy was creatively applied to calculate interfacial shear strength and improvements of 45.2% and 10.14% were achieved for hierarchical composites based on CNT-modified fibers (CF-CNTs/EP) and composites based on CNT-reinforced matrix (CF/EP-CNTs), respectively. Increases of 24.42% for CF-CNTs/EP and 10.41% for CF/EP-CNTs in tensile strength were achieved separately. The superiorities of CF-CNTs/EP were derived from that gradient interface layer formed due to the introduction of CNTs in interface and it was not obvious in CF/EP-CNTs.