PBO纤维表面超声化学处理工艺及作用机理  

Process and Action Mechanism of Sonochemical Surface Treatment of PBO Fibers

作　　者：栾燕燕[1] 刘雪峰[1] 谢建新[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《高分子材料科学与工程》2009年第9期86-89,共4页Polymer Materials Science & Engineering

基　　金：教育部"新世纪优秀人才支持计划"资助项目(NCET-06-0083)

摘　　要：研究了多聚磷酸无水乙醇溶液和超声波附加作用处理聚对苯撑苯并双口恶唑(PBO)纤维表面的工艺。利用扫描电镜和纤维电子强力仪等评价了表面处理后PBO纤维的表面形貌、拉伸强度以及与环氧树脂的界面结合性能等,探讨了PBO纤维超声化学表面作用机理。结果表明,当多聚磷酸与无水乙醇体积比为1∶1、超声设备功率54W、反应时间4min时,PBO纤维的表面处理均匀,与原丝相比,单丝拉伸强度只降低了5.7%,而单丝拔出强度则提高了67.2%。超声波的空化作用导致溶液中多聚磷酸分子分散均匀性提高、羟基自由基含量增加,以及纤维表面粗糙度提高,是PBO纤维表面处理质量改善的主要原因。The process and action mechanism of surface treatment of p-phenylene-2, 6-benzobisoxazole （PBO） fibers had been investigated under the conditions of ultrasonic wave and the mixed solution of polyphosphoric acid （PPA） and ethanol. The surface morphology, tensile property and interracial adhesion between fiber and resins were characterized by scanning electron microscope （SEM） and electronic tester of tensile strength for fibers after treatment. The results show that the surface morphology of PBO fibers had been treated uniformity, and the pull-out strength is increased by 67.2% with the tensile strength only decreased by 57% compared with untreated fibers under the conditions of the volume ratio of PPA and alcohol 1 ： 1, power of ultrasonic wave 54 W and treatment time 4 rain. The improvement of surface treatment quality of PBO fibers is attributed to the improvement of PPA molecules dispersible uniformity, the increases of hydroxyl radicals and surface roughness by the cavitation effect of ultrasonic wave.

关 键 词：聚对苯撑苯并双嘿唑纤维 超声化学 表面处理 

分 类 号：TQ342.7[化学工程—化纤工业]