短切芳纶纤维网纱层间增韧CF/EP复合材料结构与性能研究

doi:10.19936/j.cnki.2096-8000.20250528.002

复合材料科学与工程 ›› 2025, Vol. 0 ›› Issue (5): 15-21.DOI: 10.19936/j.cnki.2096-8000.20250528.002

短切芳纶纤维网纱层间增韧CF/EP复合材料结构与性能研究

彭砚双^1,2,3, 薛怿^1,2,3, 阳泽濠^1,2,3, 赵庆志^1,2,3, 张文强¹, 冯阳阳¹, 刘勇^1,3, 张辉^1,2,3*, 俞建勇²

1.东华大学材料科学与工程学院纤维材料改性国家重点实验室, 上海 201620;
2.东华大学民用航空复合材料协同创新中心, 上海 201620;
3.东华大学上海市轻质结构复合材料重点实验室, 上海 201620

收稿日期:2024-03-01 出版日期:2025-05-28 发布日期:2025-07-11
通讯作者: 张辉(1984—),男,博士,研究员,博士生导师,研究方向为碳纤维增强树脂基复合材料,zhanghui@dhu.edu.cn。
作者简介:彭砚双(1997—),女,硕士研究生,研究方向为碳纤维增强环氧树脂基复合材料。
基金资助:
国家重点研发计划(2022YFB3709202);国家发改委重大专项

Study on structure and properties of carbon fiber/epoxy composites toughened with short aramid fiber veil interlayers

PENG Yanshuang^1,2,3, XUE Yi^1,2,3, YANG Zehao^1,2,3, ZHAO Qingzhi^1,2,3, ZHANG Wenqiang¹, FENG Yangyang¹, LIU Yong^1,3, ZHANG Hui^1,2,3*, YU Jianyong²

1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China;
2. Center for Civil Aviation Composites, Donghua University, Shanghai 201620, China;
3. Shanghai Key Laboratory of Lightweight Composite, Donghua University, Shanghai 201620, China

Received:2024-03-01 Online:2025-05-28 Published:2025-07-11

摘要/Abstract

摘要： 为提高碳纤维/环氧树脂(CF/EP)复合材料的层间韧性,本文采用湿法成网工艺制备微纤化短切芳纶纤维网纱(short Aramid Fiber Veil,AFV)作为CF/EP的插层,研究了AFV面密度对其层间断裂韧性的影响,通过对CF/EP复合材料断面形貌进行观察,探究其增韧机制。结果表明,经3 g/m² AFV增韧的CF/EP复合材料的G_ⅠC值提升了60.6%,G_ⅡC值提升了69.7%,并且层间剪切性能也有所改善。结合SEM分析可知,微纤化短切芳纶纤维在受力时出现了纤维桥接、纤维拔出、纤维断裂和纵向撕裂等现象,使裂纹路径更加曲折,消耗更多能量,从而提升了CF/EP复合材料的层间韧性。

关键词: 微纤化短切芳纶纤维网纱, 碳纤维/环氧树脂复合材料, 层间断裂韧性, 纤维桥接, 纤维纵向撕裂

Abstract: For the purpose of enhancing the interlaminar fracture toughness of carbon fiber/epoxy resin (CF/EP) composites, fibrillated short aramid fiber veils (AFV) were prepared by wet netting process in this work and the influence of the areal density of AFV on the interlaminar properties of the CF/EP composites was investigated, with observing the cross-section morphology of CF/EP composites to explore its toughening mechanism. The results demonstrate that the CF/EP composites toughened by 3 g/m² AFV improve the G_ⅠC and G_ⅡC values by 60.6% and 69.7%, respectively, meanwhile, the interlaminar shear properties were improved notably. Combined with SEM analysis, the fibrillation aramid fibers show fiber bridging, fiber pullout, fiber breakage, and longitudinal tearing under stress, thus making the crack path more tortuous and absorbing more energy, the interlayer toughness of CF/EP composites materials is improved.

Key words: fibrillation short aramid fiber veil, carbon fiber/epoxy resin composites, interlaminar fracture toughness, fiber bridging, fiber longitudinal tear

中图分类号:

TB332

彭砚双, 薛怿, 阳泽濠, 赵庆志, 张文强, 冯阳阳, 刘勇, 张辉, 俞建勇. 短切芳纶纤维网纱层间增韧CF/EP复合材料结构与性能研究[J]. 复合材料科学与工程, 2025, 0(5): 15-21.

PENG Yanshuang, XUE Yi, YANG Zehao, ZHAO Qingzhi, ZHANG Wenqiang, FENG Yangyang, LIU Yong, ZHANG Hui, YU Jianyong. Study on structure and properties of carbon fiber/epoxy composites toughened with short aramid fiber veil interlayers[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(5): 15-21.

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短切芳纶纤维网纱层间增韧CF/EP复合材料结构与性能研究

Study on structure and properties of carbon fiber/epoxy composites toughened with short aramid fiber veil interlayers

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