Abstract
The weakness of easy delamination for the laminated composites always limits their wide application. In this work, the poly(phthalazinone ether nitrile ketone) (PPENK) multi-scale nanofibrous veils loaded with ZnO nanowires (ZnO@PPENK) were prepared and incorporated into the interlayer of carbon fiber reinforced poly(phthalazinone ether ketone) (PPEK) laminates (CF/PPEK). The structures and morphologies of ZnO@PPENK veils, the mode II interlaminar fracture toughness, and in-plane properties of ZnO@PPENK/CF/PPEK laminates were characterized. The results show that due to the introduction of PPENK interleaving veil, the mode Ⅱ interlayer fracture toughness of the laminated composite increased from 1238 J/m2 to 1769 J/m2 (an increase of 43%), and after loading ZnO nanowires, it further increased to 2618 J/m2, an increase of 112% compared with CF/PPEK. Moreover, the flexural modulus of ZnO@PPENK/CF/PPEK composite was slightly increased by about 10%(115 GPa), and the interlayer shear strength was improved to 78 MPa, about 31% higher than that of CF/PPEK. These results provide a new idea for interlayer materials used for interlayer reinforcement of carbon fiber reinforced polymer composites.
Published Version
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