Effect of multi-walled carbon nanotubes on mechanical properties of Ti-carbon fiber/ polyimide by monomer polymerization super hybrid composite laminates

被引：0

作者：

Li H. ^{[1
]}

Zhang X. ^{[1
]}

Li H. ^{[1
]}

Kuang N. ^{[3
]}

Tao J. ^{[1
]}

Luo X. ^{[1
]}

机构：

[1] College of Material Science & Technology, Nanjing University of Aeronautics and Astronautics, Nanjing

[2] College of Material Science & Engineering, Nanjing Institute of Technology, Nanjing

[3] Nanjing Glass Fiber Research & Design Institute, Nanjing

来源：

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2020年 / 37卷 / 03期

关键词：

Enhancement mechanism; Interface property; Mechanical properties; Multi-walled carbon nanotubes (MWCNTs); Polyimide by monomer polymerization; Super hybrid composite laminates; Ti-carbon fiber;

D O I：

10.13801/j.cnki.fhclxb.20190611.005

中图分类号：

学科分类号：

摘要：

In order to improve the bonding strength of Ti/polyimide by monomer polymerization (PMR) resin interface and improve the mechanical properties of Ti-carbon fiber(CF)/PMR super hybrid laminates, the effect of the addition of multi-walled carbon nanotubes (MWCNTs) on the mechanical properties of Ti-CF/PMR super hybrid laminates was investigated in this paper. The MWCNTs with different mass fractions (0wt%, 2.5wt%, 5.0wt% and 7.5wt%) were uniformly dispersed in PMR resin by ultrasonic dispersion. The mode Ⅰ interlaminar fracture toughness tests were experimentally conducted to explore the effect of adding MWCNTs on the interface properties of Ti-CF/PMR super hybrid laminates. Then the MWCNTs of optimized content was added to the PMR adhesive layer and CF/PMR resin to conduct bending test so as to explore the effect of adding MWCNTs on the mechanical properties of Ti-CF/PMR super hybrid laminates. SEM was used to investigate the interface morphology and enhancement mechanism of Ti-CF/PMR super hybrid laminates. The results reveal that the mode Ⅰ interlaminar fracture toughness of the PMR adhesive layer for Ti-CF/PMR super hybrid laminates is improved by 74% with 5.0wt% MWCNTs; when 5.0wt% MWCNTs are added into both the PMR adhesive layer and CF/PMR resin, the bending property of Ti-CF/PMR super hybrid laminates is improved by 42% compared with those without adding MWCNTs. This is because the MWCNTs are uniformly dispersed in the PMR adhesive layer and CF/PMR resin, and it can disperse and bear the load transferred from the interface layer to the fiber layer, using its own pull-out, fracture, bridging, debonding to absorb and consume the fracture energy to further improve the bending performance of the Ti-CF/PMR super hybrid laminates. © 2020, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.

引用

页码：581 / 590

页数：9

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