NaH-DMSO对Kevlar纤维表面处理的影响

采用化学镀工艺制备阻燃型导电纤维,为提高金属镀层与纤维基材的结合力,自制金属化试剂对Kevlar纤维进行表面粗化处理。利用分析天平、万能强力机、扫描电子显微镜、X射线衍射仪和X射线光电子能谱仪对粗化前后的Kevlar纤维进行分析和表征。结果表明:经粗化处理后,Kevlar纤维表面呈现凹凸不平的粗糙表面,有大量的微坑和凹槽,能够增大纤维与镀层间的接触面积,纤维断裂强力降低;当处理温度为30℃、粗化时间为10 min时,粗化效果较好,纤维本体强度损失为6.6%;纤维表面极性基团含量增加,表面活性增强,从而改善了Kevlar纤维与金属镀层间的结合力和黏结性。

Influence of NaH-DMSO on Surface Roughening of Kevlar Fibers

Using electroless plating to prepare flame retardant conductive fiber, metallization reagent (NaH-DMSO) was made and selected as roughening solution to etch the surface of Kevlar fibers in order to improve the interfacial binding strength between fiber substrate and metallic coating. The produced fibers were characterized by analytical balance, universal strength tester, scanning electron microscopy , X-ray diffraction and X-ray photoelectron spectroscopy . The results indicated that lots of grooves and micro-craters were distributed on the fiber surface when they were etched, which provided an uneven surface. Accordingly, the contact area between fiber substrate and metallic coating was increased. The roughening condition optimization was 30OC and 10min, with significant etching effect and non-significant strength loss (6.6%). On this condition, the content of polar group and the surface activity increase so as to improve the adhesion strength between Kevlar fiber and metal coating.