【摘要】 为改善Armos纤维和环氧树脂间的界面结合性能,采用对环氧树脂/丙酮溶液浸泡的Armos纤维进行γ-射线辐照改性处理,探索辐照剂量对其芳纶纤维增强复合材料(AFRC)界面性能的影响.研究结果表明:在辐照剂量200～1000kGy,AFRC的层间剪切强度(ILSS)和界面剪切强度(IFSS)均增加,且500kGy界面强度较未处理的提高幅度最大;经γ-射线辐照处理的芳纶纤维,表面氧含量有大幅度提高,使得纤维表面活性增大;辐照处理后纤维表面较未处理的纤维表面粗糙度有所增加;纳米硬度仪测试AFRC横断面纤维、界面和基体的纳米硬度,表明辐照可以提高复合材料的硬度.更多还原

【Abstract】 In order to improve the interfacial performance between Armos fiber and epoxy resin,γ-ray radiation technique was used to modify Armos fibers in epoxy/acetone solution and the effect of irradiation doses on the interface properties of AFRC was investigated.The results show that the interlaminar shear strength(ILSS) and the interface shear strength(IFSS) of AFRC were all increased in the irradiation dose range of 200 to 1000 kGy,and both obtained the maximum in 500 kGy compared to the untreated fibers.XPS analysis indicated that the oxygen content was enhanced so that the activity of fiber surface was raised.It was clearly observed that the roughness of fiber surface through radiation treatment was larger than that of the untreated surface from the SEM photos.The hardness at the points of the composites’ cross sections was tested by the nanoindentation technique.The results show that the hardness of the composite in the fiber,across the interface and the matrix through irradiation treatment was accordingly higher than that of the fiber untreated.更多还原