常压等离子体射流对PBO纤维表面改性

Surface Modification of PBO Fibers by Atmospheric Pressure Plasma Jet

采用常压等离子体射流（APPJ）在不同处理时间和功率下对聚对苯撑苯并二嗯唑（PBO）纤维进行表面改性，以提高其与环氧树脂基体间的界面粘结性能。通过SEM、XPS和静态接触角测试对处理前后纤维的表面形态、元素组成和表面浸润性能进行分析与表征，并采用Micro-bond测试方法测量纤维／环氧间界面剪切强度WSS，利用单纤维拉伸测试评价等离子体处理对纤维力学性能的损伤。结果表明：PBO纤维经APPJ处理后，表面浸润性能得到改善，IFSS提高了27．85％～130．96％，而纤维强力损伤很小。

To improve the interfacial adhesion property between poly（p-phenylene benzobisoxazole） （PBO） and epoxy, PBO fibers were treated with atmospheric pressure plasma jet （APPJ） in different time and power. Surface morphology, chemical composition, surface wettability, interfaeial shear strengths （IFSS） to epoxy and fiber strength for PBO fibers were determined using scanning electron microscope （SEM）, X-ray photoelectron spectroscopy （XPS）, water contact angle measurements, micro-bond pull out tests and single fiber tensile tests, respectively. The results indicated that fiber surface wettability had much improvement after plasma treatment, and the IFSS was improved from 27. 85% to 130. 96%. In addition, the single fiber tensile strength declined little.