聚醚砜多孔纤维网纱层间增韧碳纤维<strong>/</strong>环氧复合材料的性能

doi:10.11901/1005.3093.2022.653

材料研究学报

2024, Vol. 38

Issue (1): 33-42 DOI: 10.11901/1005.3093.2022.653

研究论文

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聚醚砜多孔纤维网纱层间增韧碳纤维/环氧复合材料的性能

李朝阳¹^,², 薛怿¹^,², 阳泽濠¹^,², 赵庆志¹^,², 彭砚双¹^,², 刘勇¹^,², 杨建平¹, 张辉¹^,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

Performance of Interlayer Toughened Carbon Fiber/Epoxy Composites of Polyethersulfone Porous Fiber Veil

LI Zhaoyang¹^,², XUE Yi¹^,², YANG Zehao¹^,², ZHAO Qingzhi¹^,², PENG Yanshuang¹^,², LIU Yong¹^,², YANG Jianping¹, ZHANG Hui¹^,²(

)

1 State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, School of Materials Science and Engineering, Donghua University, Shanghai 201620, China
2 Center for Civil Aviation Composites, Donghua University, Shanghai 201620, China

引用本文:

李朝阳, 薛怿, 阳泽濠, 赵庆志, 彭砚双, 刘勇, 杨建平, 张辉. 聚醚砜多孔纤维网纱层间增韧碳纤维/环氧复合材料的性能[J]. 材料研究学报, 2024, 38(1): 33-42.
Zhaoyang LI, Yi XUE, Zehao YANG, Qingzhi ZHAO, Yanshuang PENG, Yong LIU, Jianping YANG, Hui ZHANG. Performance of Interlayer Toughened Carbon Fiber/Epoxy Composites of Polyethersulfone Porous Fiber Veil[J]. Chinese Journal of Materials Research, 2024, 38(1): 33-42.

全文: PDF(19695 KB) HTML

摘要:

先用湿法纺丝制备聚醚砜(PES)多孔纤维并进行湿法抄造制备出四种不同面密度的PES多孔纤维网纱(PESV)，用真空辅助树脂灌注成型(VARI)制备出聚醚砜多孔纤维网纱层间增韧碳纤维/环氧复合材料。研究了PES多孔纤维在环氧树脂的溶解行为以及复合材料的Ⅰ型层间断裂韧性(G_IC)和Ⅱ型层间断裂韧性(G_ⅡC)、层间剪切强度和弯曲性能，并分析了复合材料层间断裂的微观形貌。结果表明,固化温度为180℃时，PES多孔纤维完全溶解在环氧树脂中；PESV面密度为31.6 g/m²时CF/EP复合材料的G_IC和G_ⅡC最佳，分别提高了54.4%和62.2%。其原因是，PES多孔纤维在环氧树脂中溶解后相分离形成了PES/环氧树脂的两相结构，改善了层间韧性；PESV面密度为21.9 g/m²时，复合材料的层间剪切强度、弯曲强度和弯曲模量也分别提高了2.9%、4.0%和7.7%。

关键词 ：复合材料, 层间增韧, 碳纤维, 聚醚砜, 纤维网纱

Abstract：

In order to improve the interlaminar toughness of carbon fiber/epoxy (CF/EP) composites, polyethersulfone (PES) porous fibers were prepared by wet spinning, and four PES porous fiber veils (PESV) with different areal densities were prepared by wet-laid method, which were subsequently used for interlaminar toughening of CF/EP composites by vacuum-assisted resin infusion molding (VARI). The dissolution behavior of PES porous fibers in epoxy resin, the mode I (G_IC) and mode II (G_IIC) interlaminar fracture toughness, the interlaminar shear strength and flexural properties of the composites were systematically examined, and the interlaminar fracture microscopic morphology of the composites was also characterized. The results showed that the PES porous fibers were completely dissolved in the epoxy resin at the curing temperature of 180^oC; The G_IC and G_IIC of CF/EP composites were best at the areal density of 31.6 g/m², which increased by 54.4% and 62.2%, respectively, which may be ascribed to that the phase separation of PES porous fibers dissolved in epoxy resin resulted in a two-phase PES/epoxy structure, thereby, improved the interlayer toughness; The interlaminar shear strength, flexural strength and flexural modulus of CF/EP composites also increased by 2.9%, 4.0% and 7.7%, respectively, for the areal density of 21.9 g/m².

Key words： composite carbon fiber interlaminar toughen polyethersulfone fiber veil

收稿日期: 2022-12-09

ZTFLH:

TB332

基金资助:上海市科委“科技创新行动计划”(20511107300);国家重点研发计划(2022YFB3709202)

通讯作者: 张辉，副研究员，zhanghui@dhu.edu.cn，研究方向为碳纤维增强树脂基复合材料

Corresponding author: ZHANG Hui, Tel: 13681792738, E-mail: zhanghui@dhu.edu.cn

作者简介: 李朝阳，男，1994年生，硕士

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https://www.cjmr.org/CN/10.11901/1005.3093.2022.653 或 https://www.cjmr.org/CN/Y2024/V38/I1/33

图1 PES多孔纤维的照片和微观SEM照片

图2 不同面密度PESV的形貌

图3 不同温度下PES纤维在环氧树脂中的形态

图4 不同面密度PESV层间增韧CF/EP复合材料的Ⅰ型层间断裂韧性

图5 不同面密度PESV层间增韧CF/EP复合材料GIC测试断裂面的SEM照片

图6 NMP刻蚀后PESV层间增韧CF/EP复合材料GIC测试断裂面的SEM照片

图7 不同面密度PESV层间增韧CF/EP复合材料的 Ⅱ 型层间断裂韧性

图8 不同面密度PESV层间增韧CF/EP复合材料GⅡC测试断裂面的SEM照片

图9 不同面密度PESV层间增韧CF/EP复合材料的层间剪切强度

图10 不同面密度PESV层间增韧CF/EP复合材料的弯曲性能

图11 不同面密度PESV层间增韧CF/EP复合材料的增韧机制示意图

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