芳纶纤维/AFR树脂复合材料界面粘结性能的研究

为了改善芳纶纤维复合材料的界面粘结性能,合成了一种新型树脂(AFR)作为基体,以未经任何表面处理的芳纶纤维作增强材料,制备了芳纶纤维/AFR复合材料。采用测定表面能、接触角、层间剪切强度、横向拉伸性能和扫描电镜观察形貌等方法,从宏观和微观等方面研究了芳纶纤维/AFR复合材料的界面粘结性能。结果表明,AFR树脂与芳纶纤维有相近的表面能,AFR树脂溶液与芳纶纤维的接触角为42.8°,而环氧树脂(EP)与芳纶纤维的接触角为68°,说明AFR树脂对芳纶纤维的润湿性优于EP树脂;芳纶/AFR复合材料的层间剪切强度、横向拉伸强度和纵向拉伸强度分别为74.64MPa、25.34MPa和2256MPa,比芳纶/EP复合材料的相应强度分别提高了28.7%、32.5%和13.4%,其复合材料破坏面的形貌也说明芳纶纤维与AFR树脂之间的界面粘结性能较好。

STUDY ON INTERFACIAL BONDING PROPERTY OF ARAMID FIBER/AFR RESIN COMPOSITES

In order to improve the interfacial bonding properties of the aramid fibers reinforced composites,a new resin(AFR) was synthesized as matrix.In this paper,the interfacial bonding behaviour of aramid fibers/AFR composite was investigated by the methods of the surface energy,contact angle,interlaminar shear strength,transverse tensile properties,scanning electron microscopy,etc.The results showed that AFR and aramid fibers have similar surface energy,and that the contact angle(42.8°) between them is smaller than the contact angle(68°) between the epoxy resin(EP) and aramid fibers.Therefore,the AFR resin had better wettability with the aramid fibers.The interlaminar shear strength,transverse tensile strength and longitudinal tensile strength of aramid/AFR composite are respectively 74.64MPa,25.34MPa and 2256MPa,increasing by 28.7%,32.5% and 13.4% respectively compared with aramid fibers/EP composite.According to the SEM photograph of aramid fibers/AFR composite,AFR resin had good interface bonding performance with aramid fibers.