期刊
COMPOSITE STRUCTURES
卷 159, 期 -, 页码 761-772出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2016.10.022
关键词
Carbon nanotubes; Energy dispersive X-ray spectroscopy; Interfacial shear strength; Gradient interface layer
资金
- Petrochemical Joint Fund of National Natural Science Fund Committee - China National Petroleum Corporation [U1362108]
- National Natural Science Foundation of China [11575126]
- Natural Science Foundation of Tianjin [16JCZDJC37800, 15JCQNJC42400]
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. (C) 2016 Elsevier Ltd. All rights reserved.
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