Delamination toughening of carbon fiber/epoxy laminates by hierarchical carbon nanotube-short carbon fiber interleaves

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• 作者：Helezi Zhou^a ; ^b ; Xusheng Du^b ; ^{xusheng.du@sydney.edu.au} ; Hong-Yuan Liu^b ; Huamin Zhou^a ; ^{hmzhou@hust.edu.cn} ; Yun Zhang^a ; Yiu-Wing Mai^b
• 关键词：Polymer-matrix composites (PMCs) ; Carbon fibers ; Carbon nanotubes ; Delamination ; Fracture toughness ; Interface
• 刊名：Composites Science and Technology
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：140
• 期：Complete
• 页码：46-53
• 全文大小：2825 K
• 卷排序：140

文摘

In this study, hierarchical short carbon fibers (SCFs) synthesized with carbon nanotubes (CNTs) were used as CNT-SCF interleaves to increase the mode I delamination fracture energy GIC of carbon fiber/epoxy (CF/EP) composite laminates. Even at a relatively low CNT-SCF areal density, 1.0 mg/cm2, GIC (1.17 kJ/m2) was increased by 125% compared to the control laminates (0.52 kJ/m2), which is a very high value compared to those results obtained by other interleaving methods in CF/EP laminates. The toughening effects of SCFs in bulk epoxy and interleaved CF/EP laminates were also studied to better understand the failure mechanisms of the hierarchical CNT-SCF structure. SEM observations revealed synergistic toughening mechanisms in these CNT-SCF interleaved CF/EP laminates.