电子束固化复合材料界面

电子束固化复合材料界面粘结性能较低是急待解决的问题。利用阳极氧化技术和偶联剂涂层对碳纤维表面进行处理。处理前后的碳纤维表面性能利用SEM、XPS和接触角测试方法进行分析,通过层间剪切强度表征电子束固化复合材料界面粘结性能,并且与热固化复合材料进行对比。结果表明: 当碳纤维在酸性电解液中进行阳极氧化时,有利于提高电子束固化复合材料界面粘合性能,在碱性电解液中进行阳极氧化时, 则导致较低界面粘接性能。阳极氧化与偶联剂双重增效作用能够提高电子束固化复合材料界面粘合性能。

INTERFACE OF ELECTRON BEAM CURED CARBON FIBER REINFORCED COMPOSITES

In order to improve the interfacial properties of EB cured composites, the carbon fibers were anodized and coated with an epoxy based coupling agent. The influence of different electrolytes used in anodic oxidation on the carbon fiber properties was studied. The untreated and treated carbon fibers were investigated by SEM and XPS, and the contact angles were analyzed to better understand the surface properties of carbon fibers. The adhesion between carbon fibers and epoxy matrix was evaluated using interlaminar shear strength (ILSS) testing of the EB processed composite samples and compared with adhesion data for the same fiber in a thermally processed epoxy matrix. It is shown that the carbon fibers treated with acidic electrolyte improve ILSS of EB cured composites; on the other hand, the carbon fibers treated with basic electrolyte decrease ILSS of EB crued composites. The interfacial properties of EB cured carbon fiber reinforced epoxy matrix composites are improved after the carbon fibers have been double treated.