Twaron纤维的新型化学活化方法

摘要

以傅瑞德-克拉夫茨(Friedel-Crafts)反应为基础,活化处理Twaron纤维的惰性表面.对经过活化处理的Twaron 纤维进行了单丝拔出(SFP)、X射线衍射(XRD)、扫描电镜(SEM)、红外图谱(FHR)、表面电子能谱(XPS),以及表面自由能等测试.测试结果显示,经过活化处理后,Twaron纤维表面因环氧基团的接枝而使表面自由能显著增加；纤维表面的结晶结构未发生显著改变,纤维的本体强度未降低；相对应的环氧树脂基复合材料的单丝拔出强度提高了约50％.%Twaron fiber surface was modified via a novel chemical approach based on Friedel-Crafts reaction. After the modification treatment,the surface properties were investigated via SFP,XRD,SEM,FTIR,XPS and Surface Free Energy measurement,and so on. The results show that after the treatment, the oxygen/carbon ratio of Twaron fiber surface increases remarkably because of Ep-oxy group graft,and the crystal structure of Twaron fiber surface was not destroyed,moreover the single fiber pull-out strength value of Twaron fiber/Epoxy composites was enhanced by about SO %.