电晕处理对高性能PBO纤维的表面性能及其界面粘接性能的影响

对高性能PBO纤维表面进行了电晕处理,优化了其处理工艺。用XPS,FT-IR和SEM研究了处理前后纤维表面化学结构及物理结构的变化,通过单丝拔出试验和短梁剪切试验评价了PBO纤维与树脂基体的微宏观界面粘接性能。结果表明:经电晕处理后,PBO纤维表面含氧量增多,表面浸润性得到改善,单丝拔出的PBO-环氧界面剪切强度(IFSS)提高了25.6 ％,但短梁剪切强度(ILSS)的提高不明显。

EFFECT OF CORONA TREATMENT ON THE SURFACE AND INTERFACIAL ADHESION PROPERTIES OF HIGH PERFORMANCE POLY (P-PHENYLENE BENZOBISOXAZOLE)(PBO) FIBRE

PBO super fibre is submitted to a corona treatment, and the properties of the interphase between PBO fibres and epoxy matrix systems are optimized by a surface treatment process of the fibres. The relation is studied between this surface treatment and the resulting chemical and physical surface structure, as measured with XPS,FT-IR,SEM and surface wettability. The adhesion strength in fibre-epoxy systems, as measured with single-fibre pull-out and short beam shear experiments, has been established and related to the macromechanical data of real composites. It is concluded that corona-treated fibres may cause 25.6% improvement in the interfacial shear strength(IFSS) due to the increase of the oxygen surface content and the well wettability to water. But the short beam shear strength values from the corona-treated and untreated fibres showed only small differences.