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

作者：Zhou, Helezi; Du, Xusheng^*; Liu, Hong-Yuan; Zhou, Huamin^*; Zhang, Yun; Mai, Yiu-Wing

来源：Composites Science and Technology, 2017, 140: 46-53.

DOI：10.1016/j.compscitech.2016.12.018

• Polymer-matrix composites (PMCs)
• Carbon fibers
• Carbon nanotubes
• Delamination
• Fracture toughness
• Interface

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 G(IC) of carbon fiber/epoxy (CF/EP) composite laminates. Even at a relatively low CNT-SCF areal density, 1.0 mg/cm(2), Gic (1.17 kJ/m(2)) was increased by 125% compared to the control laminates (0.52 kJ/m(2)), 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.

• 出版日期2017-3-1
• 单位华中科技大学