国产高性能PBO纤维的常温等离子表面改性

Surface modification of domestic PBO fiber by room temperature plasma

使用等离子处理法对国产PBO纤维进行表面改性,用Micro-bond法测试纤维与树脂基体的界面剪切强度τIFSS,并测试纤维本体强度σ,系统研究了等离子体处理条件,即处理时间、功率、气压、气体氛围等对PBO纤维表面性能和本体性能的影响。实验结果显示,τIFSS最大提升96.8%,此时纤维强度保持率R=97.1%,氩气为最佳气体氛围。采用接触角和XPS测试分析处理前后纤维浸润性和表面元素变化,并使用SEM观察PBO纤维表面形态的变化,表明等离子处理后PBO纤维表面粗糙度增加,润湿性大幅改善,表面元素O/C比例增加。

In this paper,plasma treatment on domestic PBO （poly （p-phenylene benzobisoxazole）） fiber surface was studied.Micro-bond test was used to measure interfacial shear strength （（Τ）IFSS） between fiber and epoxy resin,and tensile strength （σ） of fiber was also measured.The effects of modification condition such as treating time,power,pressure,and atmosphere on fiber surface performance and bulk strength were systematically investigated.The results show that the maximal （Τ）IFSS increase is 96.8％,fiber strength retention rate is 97.1％,and argon is the best atmosphere.The changes of fiber surface wet-ability and surface elementary composition were determined by contact angle meter and X-ray photoelectron spectroscopy respectively,and the changed surface morphology of fiber was also investigated by SEM test.The results show after surface modification,fiber superficial roughness increases obviously,fiber wet-ability improves dramatically,and O/C ratio of surface elementary composition increases.