Nano-/micron-scale synergistic toughening of carbon fiber/epoxy composites via interleaving co-polyimide film

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING Composites Part A: Applied Science and Manufacturing Pub Date : 2025-05-01 Epub Date: 2025-01-17 DOI:10.1016/j.compositesa.2025.108738

Lili Zhang , Gong-qiu Peng , Deqi Jing , Ying-fen Wang , Shouchun Zhang

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Abstract

Carbon fiber/epoxy composites (CF/EP) are significant components of engineering materials in defense, aerospace and transportation field. Nevertheless, one of the main obstacles to improve mechanical strength of CF/EP is delamination. In this study, a kind of hydroxyl-functionalized block co-polyimide (BOH) filming as interleaves achieved multi-scale synergistic toughening, including reaction-induced phase separation structures at nano-scale and plastic deformation of BOH enrichment at micro-scale, which aims to improve the interlaminar fracture toughness of CF/EP composites effectively. As a result, mode I interlaminar toughness at initial (G_IC-NL) and at propagation (G_IC-Prop) of CF/EP laminates interleaved with 7 μm BOH film (CF-EP/BOH7) are increased by 126 % and 183 %, respectively. CF-EP/BOH7 laminates exhibit improvement of 206 % in mode II interlaminar toughness. This multi-scale toughening method initiates a new way for improving the interlaminar toughness of CF/EP composites.

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交错共聚酰亚胺膜对碳纤维/环氧复合材料的纳米/微米级协同增韧

碳纤维/环氧复合材料（CF/EP）是国防、航空航天、交通运输等领域工程材料的重要组成部分。然而，提高CF/EP机械强度的主要障碍之一是分层。在本研究中，一种羟基功能化嵌段共聚酰亚胺（BOH）薄膜作为交错层实现了多尺度的协同增韧，包括纳米尺度上反应诱导的相分离结构和微尺度上BOH富集的塑性变形，旨在有效提高CF/EP复合材料的层间断裂韧性。结果表明，与7 μm BOH薄膜（CF-EP/BOH7）交织的CF/EP层板的I型层间初始韧性（sic - nl）和扩展韧性（ic - prop）分别提高了126%和183%。CF-EP/BOH7层压板的II型层间韧性提高了206%。这种多尺度增韧方法为提高CF/EP复合材料的层间韧性开辟了一条新途径。

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公司名称

产品信息

阿拉丁

1-Methyl-2-pyrrolidinone (NMP)

阿拉丁

N, N-Dimethylformamide (DMF)

来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.