Interlaminar toughening of carbon fiber/epoxy composites with graphene oxide-carbon nanotube composite film

被引：0
|
作者：
Dai S. [3 ]
Zhou Y. [1 ,2 ]
Li W. [4 ]
Bai W. [3 ]
Zhao H. [1 ,2 ]
Bai H. [3 ]
Hu X. [3 ]
机构：
[1] State Key Laboratory of Advanced Forming Technology and Equipment, China Academy of Machinery Science and Technology Group, Beijing
[2] Dezhou Branch, Beijing National Innovation Institute of Ligheweight CO., LTD., Dezhou
[3] College of Materials, Xiamen University, Xiamen
[4] National Key Laboratory of Advanced Composites, AVIC Composite Technology Center, AVIC Composite CO., LTD., Beijing
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 07期
基金：
中国国家自然科学基金;
关键词：
carbon fiber; carbon nanotube; composites; graphene oxide; interlaminar toughening;
D O I：
10.13801/j.cnki.fhclxb.20221027.003
中图分类号：
学科分类号：
摘要：
The interlayer properties of carbon fiber reinforced resin matrix composites are always the weakness of composites. A composite film was designed and fabricated using graphene oxide (GO) and carbon nanotubes (CNT), which exhibited good permeability and resin wettability. A hybrid carbon fiber/epoxy (CF/EP) composite was prepared using the composite GO-CNT film by interlayer toughening method. The interlaminar toughness of the GO-CNT-CF/EP composites was investigated by open type interlaminar fracture toughness (GIC) and slip type interlaminar fracture toughness (GIIC). The interlayer toughening effect and toughening mechanism of the GO-CNT composite film on the GO-CN-CF/EP composites were analyzed based on the damage micro-morphology and damage/destruction characteristics of the composites. The results show that the composite GO-CNT film prepared with a mass ratio of GO to CNT of 3∶7 has good film-forming processability and resin wettability.The contact angle between EP and GO-CNT composite film is much lower than that between EP and pure GO film. Moreover, GO and oxygen-containing groups such as hydroxyl, carboxyl, and epoxy group in CNT increase their physical affinity and chemical interaction with EP, which is conducive to the toughening of GO-CNT/EP microzone structure between layers of composite materials. The GO-CNT composite film has no enhancement effect on the GIC of the composite. The GIC value of the GO-CNT-CF/EP composite even dropped slightly compared to the CF/EP composites. However, the GO-CNT composite film has a good effect on improving the GIIC of the GO-CNT-CF/EP composite. The GIIC of the composite increased from 1 855 J/m2 for the CF/EP composite to 2 720 J/m2 for the GO-CNT-CF/EP composite, which has an increase of 47%. This is attributed to the interpenetrating and overlapping network structure formed between the GO-CNT composite film and the resin, which inhibits the propagation of interlayer micro-cracks caused by slip-type loading. The glass transition temperature of GO-CNT/EP composites is similar to that of CF/EP composites. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：3862 / 3873
页数：11
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