热氧老化对碳纤维织物增强聚合物基复合材料弯曲性能的影响

樊威; 李嘉禄

doi:10.13801/j.cnki.fhclxb.20141216.002

热氧老化对碳纤维织物增强聚合物基复合材料弯曲性能的影响

樊威^1,2,
李嘉禄^2,

1.
西安工程大学功能性纺织材料及制品教育部重点实验室, 西安 710048;
2.
天津工业大学先进纺织复合材料教育部重点实验室, 天津 300387

基金项目: 天津市科技计划(11ZCKFSF00500, 10SYSYJC27800, 13TXSYJC40500); 西安工程大学博士科研启动基金(BS1514)

详细信息

通讯作者:
李嘉禄, 教授, 博士生导师, 研究方向为三维纺织复合材料。 E-mail: lijialu@tjpu.edu.cn

中图分类号: TB332;V258
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出版历程
- 收稿日期: 2014-09-16
- 修回日期: 2014-11-11
- 刊出日期: 2015-10-14

Effects of thermo-oxidative aging on flexural properties of carbon fiber fabric reinforced polymer matrix composites

FAN Wei^1,2,
LI Jialu^2,

1.
Key Laboratory of Functional Textile Material and Product, Ministry of Education, Xi'an Polytechnic University, Xi'an 710048, China;
2.
Key Laboratory of Advanced Textile Composites, Ministry of Education, Tianjin Polytechnic University, Tianjin 300387, China

摘要

摘要: 为了探索增强体结构对碳纤维增强聚合物基复合材料(CF-PMCs)热氧老化后弯曲性能的影响, 对三维四向编织碳纤维/环氧复合材料(简称为三维编织复合材料)和层合平纹碳布/环氧复合材料(简称为层合复合材料)的热氧老化性能进行了研究。利用FTIR、老化失重、弯曲测试和SEM等手段分析了热氧老化前后的试样。结果表明:热氧老化导致基体树脂的氧化断链以及纤维/基体界面结合力的退化是两种复合材料弯曲强度和弯曲模量下降的原因, 弯曲强度比弯曲模量更容易受热氧老化的影响。在相同的热氧老化条件下, 层合复合材料的热氧老化失重大于三维编织复合材料的, 而三维编织复合材料的弯曲强度和弯曲模量保留率均大于层合复合材料的。在140 ℃下老化1 200 h后, 层合复合材料的弯曲强度和弯曲模量保留率分别为74.7%和88.3%, 而对应的三维编织复合材料的分别为79.4%和91.5%。因此, 采用三维编织预制件作为CF-PMCs的增强体是一种有效的提高其热氧稳定性的方法。
- 聚合物基复合材料 /
- 碳纤维 /
- 热氧老化 /
- 增强体 /
- 弯曲强度
Abstract: In order to explore the reinforced structure effects on the flexural strength of carbon fiber reinforced polymer matrix composites (CF-PMCs) after thermal-oxidative aging, the thermal-oxidative aging properties of 3D four-directional braided carbon fiber/epoxy composites (3D braided composites for short) and laminated plain weave carbon fabric/epoxy composites (laminated composites for short) were studied. The samples before and after thermos-oxidative aging were analyzed by means of FTIR, aging mass loss, bending test and SEM. The results indicate that the oxidation chain scissions of matrix resin and the degradation of the bonding force of fiber/matrix interface caused by thermal-oxidative aging are the reasons for the decrease of the flexural strength and flexural modulus of the two kinds of composites. Flexural strength is more easily affected by thermal-oxidative aging than flexural modulus. Under the same thermal-oxidative aging conditions, the thermal-oxidative aging mass loss of laminated composites is larger than that of 3D braided composites, but the flexural strength and flexural modulus retention rates of the 3D braided composites are greater than those of laminated composites. After age at 140 ℃ for 1 200 h, the flexural strength and flexural modulus retention rates of laminated composites are 74.7% and 88.3%, respectively, and those of corresponding 3D braided composites are 79.4% and 91.5%, respectively. Therefore, adopting 3D braided preform as the reinforcement of CF-PMCs is an effective way to improve the thermo-oxidative stability.
- polymer matrix composites /
- carbon fiber /
- thermal-oxidative aging /
- reinforcement /
- flexural strength

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