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研究了CCF300碳纤维/5405双马树脂复合材料在71℃恒温水浸循环吸湿-脱湿行为。试样经过三次饱和吸湿-脱湿过程,探讨不同循环次数CCF300/5405复合材料的吸湿率和水分扩散速率变化,并采用SEM观察纤维/基体界面变化,分析了造成循环湿热环境下复合材料体系吸湿-脱湿变化的原因。研究结果表明:CCF300/5405复合材料的吸湿行为基本满足Fick第二定律,并且在水浸14天后达到饱和吸湿状态,饱和吸湿率约为0.66%;材料吸湿处理后,纤维与基体间的界面遭到水分破坏,产生大量空隙和裂纹,使水分的扩散速率明显增加,饱和吸湿率略有增大,并且这种破坏不可逆。
The moisture absorption and dehumidification behavior of CCF300 carbon fiber / 5405 double-horse resin composite at 71 ℃ was studied. The moisture absorption rate and water diffusion rate of CCF300 / 5405 composite were investigated after three times of saturated moisture absorption and desorption process. The changes of fiber / matrix interface were observed by SEM. The moisture absorption - Dehydration change causes. The results show that the hygroscopic behavior of CCF300 / 5405 composites basically satisfies the second law of Fick, and reaches saturated moisture absorption state after 14 days of flooding, the saturated moisture absorption rate is about 0.66%. After moisture absorption, the interface between fiber and matrix To the moisture damage, resulting in a large number of voids and cracks, so that the rate of diffusion of water increased significantly, saturated moisture absorption rate increased slightly, and this damage is irreversible.