碳纤维与聚酰胺自增强复合材料协同增强体系的制备及其性能研究

doi:10.19936/j.cnki.2096-8000.20211028.031

复合材料科学与工程 ›› 2022, Vol. 0 ›› Issue (6): 41-46.DOI: 10.19936/j.cnki.2096-8000.20211028.031

碳纤维与聚酰胺自增强复合材料协同增强体系的制备及其性能研究

门树林, 张健敏^*, 高志浩, 温荣严, 骆林, 崔笑晨

青岛大学机电工程学院电动汽车智能化动力集成技术国家地方联合工程研究中心,青岛 266071

收稿日期:2021-07-05 出版日期:2022-06-28 发布日期:2022-07-19
通讯作者: 张健敏(1981-),女,副教授,博士,主要研究方向为复合材料的设计及力学性能、聚合物功能性膜材料的设计与应用等,zhangjm@qdu.edu.cn。
作者简介:门树林(1993-),男,硕士研究生,主要研究方向为复合材料的设计及力学性能。
基金资助:
中国博士后科学基金(2017M622133);青岛市科技局(18-2-2-3-jch)

Study on the preparation and properties of synergistic reinforcement system of carbon fiber and polyamide self-reinforced composite

MEN Shu-lin, ZHANG Jian-min^*, GAO Zhi-hao, WEN Rong-yan, LUO Lin, CUI Xiao-chen

National Engineering Research Center for Intelligent Electrical Vehicle Power System,School of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China

Received:2021-07-05 Online:2022-06-28 Published:2022-07-19

摘要/Abstract

摘要： 采用叠层热压工艺制备了单向碳纤维与聚酰胺自增强复合材料协同增强体系(CF-PF/coPA),即在碳纤维增强聚酰胺复合材料(CF/coPA)的基础上引入界面性能优异且韧性好的聚酰胺自增强复合材料(PF/coPA)。采用0°/90°拉伸试验、三点弯曲测试和动态机械性能测试研究了不同纤维体积分数CF-PF/coPA单向复合材料的纵向/横向拉伸力学性能、弯曲力学性能和热机械性能的变化趋势。结果表明,与PF20/coPA复合材料相比,CF-PF(10∶10)/coPA复合材料的纵向拉伸强度(267.6 MPa)与模量(8.9 GPa)分别提高了38.4%和778.7%。而且弯曲强度(67.1 MPa)比PF20/coPA、CF20/coPA复合材料分别提高了77.8%和17.2%。同时,与CF20/coPA复合材料相比,纤维增强效率提高了18.3%。断裂面SEM图像、90°拉伸试验和三点弯曲测试均表明CF-PF/coPA复合材料的界面性能优异。动态机械性能测试表明,在低温与高温条件下,该复合材料均具有比PF20/coPA与CF20/coPA复合材料更优异的力学性能。因此,该协同增强体系具有潜在的性能和成本优势,对结构材料的轻量化具有重要的理论和实践意义。

关键词: 碳纤维增强树脂基复合材料, 自增强复合材料, 协同增强, 力学性能, 轻量化

Abstract: A synergistically reinforced composite system (CF-PF/coPA) from unidirectional carbon fibers and self-reinforced polyamide composites was prepared by film stacking and hot pressing process. This self-reinforced polyamide composites with excellent interfacial properties and toughness were introduced into carbon fiber reinforced polyamide composites (CF/coPA). Longitudinal/transversal mechanical properties, flexual properties and thermo-mechanical properties were studied by 0° and 90° tensile tests, three-point bending tests and dynamic mechanical tests of these unidirectional CF-PF/coPA composites with different fiber volume fractions. Compared with PF20/coPA composites, longitudinal tensile strength (267.6 MPa) and modulus (8.9 GPa) of CF-PF (10∶10)/coPA composites have improved by 38.6% and 778.7%, respectively. Moreover, flexual strength (68.04 MPa) improved by 78.2% and 18.8% respectively compared with PF/coPA and CF/coPA composites. Meanwhile, the fiber reinforcing efficiency has been improved by 18.3% compared with CF20/coPA composites. SEM images of fractured surfaces, 90° tensile and three-point bending tests show that CF-PF/coPA composites exhibit superior interfacial properties. Dynamic mechanical tests show that the composites have higher mechanical properties than PF20/coPA and CF20/coPA composites at both low and high temperatures. Therefore, this synergistically reinforced composite system shows potential advantages on properties and cost issues, suggesting its theoretical and practical significance in lightweight applications of structural materials.

Key words: carbon fiber reinforced polymeric composites, self-reinforced composites, synergistic reinforcement, mechanical properties, lightweight

中图分类号:

TB332

门树林, 张健敏, 高志浩, 温荣严, 骆林, 崔笑晨. 碳纤维与聚酰胺自增强复合材料协同增强体系的制备及其性能研究[J]. 复合材料科学与工程, 2022, 0(6): 41-46.

MEN Shu-lin, ZHANG Jian-min, GAO Zhi-hao, WEN Rong-yan, LUO Lin, CUI Xiao-chen. Study on the preparation and properties of synergistic reinforcement system of carbon fiber and polyamide self-reinforced composite[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(6): 41-46.

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碳纤维与聚酰胺自增强复合材料协同增强体系的制备及其性能研究

Study on the preparation and properties of synergistic reinforcement system of carbon fiber and polyamide self-reinforced composite

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