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《工程塑料应用》 2019年第09期
DOI:10.3969/j.issn.1001-3539.2019.09.022
不同水环境下碳纤维增强EP复合材料的吸湿老化
邹在平1,孟兵1,何文佩2,王李蓉1,廖元凯1
1.成都航空职业技术学院,先进复合材料成型技术应用研究中心,成都 610100; 2.四川航天长征装备制造有限公司,成都 610100 
Hygroscopic Aging of Carbon Fiber Reinforced EP Resin Composites in Different Water Environment
Zou Zaiping1, Meng Bing1, He Wenpei2, Wang Lirong1, Liao Yuankai1
1.Applied Research Center of Advanced Composite Manufacturing Technology, Chengdu Aeronautic Polytechnic, Chengdu 610100, China; 2. Sichuan Aerospace Long March Equipment Manufacturing Co. Ltd., Chengdu 610100, China 
摘要:对碳纤维增强环氧树脂(EP)复合材料在常温水、80℃高温水和浓度为5%的盐水三种水环境中的吸湿老化行为进行了综合对比试验。通过测试吸水率、拉伸强度、硬度和玻璃化转变温度(Tg)探索了该复合材料在不同水环境中的性能变化规律,同时,使用傅立叶变换红外光谱(FTIR)仪和扫描电子显微镜(SEM)对老化机理进一步研究。结果表明,不同水环境下试样的初期吸水过程均符合Fick定律,80℃高温水中样品的吸水率和吸水速率明显大于常温水和浓度5%的盐水环境。与干态空白样品相比,水环境下样品的拉伸强度、硬度和Tg均出现了不同程度的下降,其中常温水和5%盐水环境中样品的性能变化趋势一致且相对较小,而高温水环境对样品力学性能和热性能的影响十分显著。FTIR分析表明,不同水环境下浸泡的样品并未发生显著的化学反应,SEM形貌观测,证明了样品在吸湿老化后界面结合出现不同程度的下降,这与力学性能测试结果保持一致。 
Abstract:The hygroscopic aging behavior of carbon fiber reinforced epoxy resin composites in three water environments, i.e. normal temperature water, 80℃ water and 5wt% saline water, was comprehensively compared. The changing laws of the properties of the composites in different water environments were explored through the tests of water absorption, tensile strength, hardness and glass transition temperature (Tg). At the same time, the aging mechanism of the composites was studied by using Fourier Transform Infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The results show that the initial water absorption process of samples in different water environments conforms to Fick's law. The water absorption ratio and absorbent rate of samples in 80℃ water are obviously higher than those in normal temperature water and 5wt% saline water. Compared with the dry blank samples, the tensile strength, hardness and Tg of the samples in the water environment decreases in varying degrees. The changes of the properties of the samples in normal temperature water and 5wt% saline water are consistent and relatively small, while the effects of high temperature water on the mechanical and thermal properties of the samples are significant. FTIR showes that the samples immerses in different water environments do not undergo significant chemical reactions. The observation of SEM showes that the interface bonding of the samples decreases in varying degrees after hygroscopic aging, which is basically consistent with the results of mechanical properties testing. 
关键词:树脂基复合材料;水环境;吸湿老化;力学性能 
Keywords:resin matrix composite; water environment; hygroscopic aging; mechanical property 
基金:四川省教育厅自然科学重点项目(15ZA0342; 18ZA0035),成都航空职业技术学院自然科学研究项目(061838) 
本文引用格式:
邹在平,孟 兵,何文佩,等.不同水环境下碳纤维增强EP复合材料的吸湿老化[J].工程塑料应用,2019,47(9):116-120,143.
Zou Zaiping,Meng Bing,He Wenpei,et al. Hygroscopic aging of carbon fiber reinforced EP resin composites in different water environment[J]. Engineering Plastics Application,2019,47(9):116-120,143. 

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