碳纤维复合材料单向板耐候性及湿热老化性能

Weatherability and Hygrothermal Ageing Properties of CFRP Plates

通过模拟环境因素对碳纤维增强树脂基复合材料(CFRP)板的耐候性及湿热老化性能进行了检验,研究了CFRP板的抗拉强度、弹性模量及断裂伸长率随严苛环境下的暴露时间的变化规律。研究表明强紫外线、湿冷环境和酸碱侵蚀对CFRP板性能影响较大,90天周期内拉伸强度下降了10%左右,拉伸模量下降15%左右;纯水、盐溶液及加速湿热老化的影响则并不十分显著。扫描电镜观察发现,绝大多数侵蚀性破坏首先发生在树脂层,提高基体树脂的性能将有助于增强CFRP的耐久性。

The weatherability and hygrothermal ageing properties of carbon fiber reinforced plastic（CFRP）plates were studied by analyzing the evolution of the mechanical properties（i.e.,tensile strength,tensile modulus,and breaking elongation etc.）of the plates on exposure to simulation environments.The results showed that,intensive ultraviolet radiation,cool and moist environment,as well as acid and alkali erosion have great influences on the performance of CFRP plates.The tensile strength dropped by 10% and modulus by 15% under these conditions in 90 days.The influence of pure water,salt solution and accelerated hygrothermal aging is relatively not very significant.The microscope images indicated that most of the erosion damages started from the resin layers.It is believed that matrix property improvement would be helpful to enhance the durability of CFRP.