摘要
采用称量法和排水法联合,研究了侧面封边和未封边单向玻璃纤维增强环氧树脂基复合材料层合板试件的吸湿量和体积变化率与浸泡时间的关系,结果显示,复合材料侧面吸湿的速度远大于表面吸湿速度;侧面封边复合材料试件的饱和吸湿量为1.30%,而未封边试件的为2.26%,即与侧面封边试件相比,未封边试件的饱和吸湿量(质量比)增加了73.8%;对于表观最大溶胀率,侧面封边复合材料试件的为0.67%,而未封边试件的为2.05%,即未封边试件的表观最大溶胀率(体积比)升高了200.1%。这些实验结果表明,复合材料吸湿存在开孔吸湿与闭孔吸湿两种机制,开孔吸湿以液态水的扩散为主,而闭孔吸湿以气态水的扩散为主。
Effects of edge-sealing on water absorption of glass fiber reinforced epoxy resin composites （GF/E-51） were investigated by weight measurement and volume measurement of composites specimen. The experimental results show that the diffusivity coefficient of edge absorption is far more than that of the surface absorption and the maximum moisture content of the unsealed specimen increases by 73.8%. Meanwhile, the volume dilatation of the unsealed specimen increases by 200.1%, which indicates that the mechanism of water absorption of GF/E-51 can be classified into two types： open-porous absorption and close-porous absorption. Water behaves as a vaporphase in the porous close composite, but as a liquid-phase in porous open absorption.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2011年第4期51-54,共4页
Journal of National University of Defense Technology
基金
国家部委预研基金项目(2009k132)
关键词
侧面封边
开孔吸湿
闭孔吸湿
玻璃纤维增强环氧树脂复合材料
edge-sealed
open-porous ahsorption
close-porous abeorption
glass fiber reinforced epoxy resin composites
