低温等离子体对PBO纤维表面的改性

采用硅烷偶联剂处理聚对苯撑苯并双噁唑(PBO)纤维,利用常压射频低温等离子体对PBO纤维进行了表面处理,通过扫描电镜、红外光谱、光学显微镜等研究了处理时间对PBO纤维表面官能团和表面形貌的影响规律,通过单丝拔出实验测定PBO纤维基复合材料的界面剪切强度。结果表明:经过常压射频低温等离子体处理后,PBO纤维的表面形成了大量的极性基团,表面产生明显的凹坑,PBO纤维与树脂的粘接性能提高50%,纤维的拉伸强度下降5%。

Surface modification of PBO fiber by low-temperature plasma treatment

The surface modification of poly(p-phenylene benzobisoxazole)(PBO) fiber treated with silane coupling agent was performed with atmospheric-pressure radio-frequency low-temperature plasma.The dependence of the surface functional group and morphology of PBO fiber on the treating time was studied by scanning electron microscopy,infrared spectroscopy and optical microscopy.The interfacial shear strength of PBO fiber-based composite material was measured by single fiber pull-out test.The results showed that a huge amount of polar groups formed on the surface of PBO fiber after the atmospheric-pressure radio-frequency low-temperature plasma,resulting in the formation of some obvious pits.The adhesion property of PBO fiber with resin was increased by 50% and the tensile strength of the fiber was decreased by 5%.