摘要
主要研究了作为气液传输管结构层的碳/环氧复合材料,在湿热环境下不同介质中的吸湿特性以及湿热前后力学性能的变化,并结合SEM和动态热力学进一步说明湿热老化对碳/环氧复合材料的影响。结果表明,碳/环氧复合材料的吸湿行为符合菲克第二定律;湿热前后,复合材料的力学性能的下降与吸湿率的增加趋势相对应;扫描电镜及动态力学性能的分析结果显示,湿热环境下水分子的浸入导致基体的膨胀、塑化,界面的脱粘,进而导致复合材料的性能下降。
The structure,hygroscopic properties in hot and humid environment and changes of the mechanical properties in different media before and after heat of the gas-liquid transfer tube layer used carbon / epoxy composites were studied. Through SEM and dynamic thermodynamic,impact of heat aging on carbon / epoxy composites was further explored. The results show that the moisture absorption behavior of carbon / epoxy composites conforms with Fick＇s second law; before and after aging,mechanical properties of the composite material decrease with increasing moisture absorption rate; the results of SEM and DMA show that the water molecules in hygrothermal environment immersing substrate causes swelling,plastic,interface debonding,which leads to a decline in performance of composite materials.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2015年第8期107-112,共6页
Polymer Materials Science & Engineering
基金
国家高技术研究发展计划(863计划)项目(2012AA03A201)
教育部科学技术研究重点项目(211007)
天津市高等学校科技发展基金计划项目(2012ZD02)
关键词
湿热老化
吸湿行为
力学性能
碳/环氧复合材料
hydrothermal aging
moisture behavior
mechanical properties
carbon / epoxy composites
