基于碳纳米管薄膜的复合材料层间增韧

doi:10.7527/S1000-6893.2019.22900

Abstract

Abstract: To enhance the interlaminar toughness of laminated composites, the continuous Carbon NanoTube (CNT) film made by the floating catalyst chemical vapor deposition method is in-situ deposited on the surface of unidirectional carbon fiber fabrics. The CNT film interleaved carbon fiber/epoxy laminated composites are then fabricated by using the Vacuum Assisted Resin Transfer Molding (VARTM) processing. The effect of the areal density of the CNT film on the mode II fracture toughness of these hybrid composites is analyzed. The testing results indicated that mode Ⅱ fracture toughness initially increased gradually with the increase of the areal density of the CNT film. When the areal density of the CNT film is about 9.64 g/m², mode Ⅱ fracture toughness of the laminate increased by 94% compared with that without the CNT film interleaving. Microcrack bridging by CNTs and CNT pulling-out from the resin are found to be the main mechanisms of toughening. Upon further increasing the areal density of CNT films, mode Ⅱ fracture toughness deceased, which is mainly due to fact that CNT films might not be fully wetted by the resin as they are getting thicker.

Key words: carbon nanotube film, in-situ deposition, vacuum assisted resin transfer molding, composites, mode Ⅱ fracture toughness

CLC Number:

V258⁺.3

YU Yanyan, ZHANG Yuan, GAO Limin, QU Shuxuan, LYU Weibang. Toughness enhancement for interlaminar fracture composite based on carbon nanotube films[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(10): 422900-422900.

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Toughness enhancement for interlaminar fracture composite based on carbon nanotube films

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