超声蚀刻法研究聚丙烯腈预氧化纤维的皮芯结构  

Studies on skin-core structure of stabilized PAN fibers by ultrasonic etching method

作　　者：胡秀颖[1,2] 王成国[2] 于美杰[2] 王雯[2] 卢文博[2] 井敏[3] 朱波[2] 王延相[2] 王启芬 

机构地区：[1]山东大学材料科学与工程学院材料液固结构演变与加工教育部重点实验室,山东济南250061 [2]山东大学材料科学与工程学院碳纤维工程技术研究中心,山东济南250061 [3]山东建筑大学材料科学与工程学院,山东济南250101 [4]山东省非金属材料研究所,山东济南250031

出　　处：《功能材料》2011年第10期1825-1828,共4页Journal of Functional Materials

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB605601);山东省自然科学基金资助项目(Z2008F02;ZR2010BQ032);国际科技合作资助项目(2009DFR50600);山东省博士后创新资助项目(200902028)

摘　　要：预氧化各温区纤维经超声蚀刻处理后,利用扫描电镜(SEM)观察其皮层和芯部的形貌差异,并借助Raman光谱证实了预氧化纤维皮层和芯部的化学结构差异。结果表明预氧化初期195～225℃预氧化纤维整体预氧化程度低,纤维皮层和芯部的结构几乎没有差异;预氧化中后期235～265℃预氧化纤维芯部的稳定化程度较皮层低,芯部被蚀刻溶解,皮、芯形貌差异明显;经275℃预氧化后,纤维芯部稳定化程度提高,无论皮层还是芯部都呈现不溶性;最终的预氧化纤维出现了宽化的石墨特征Raman散射峰,但皮层的衍射峰较芯部更为宽化,反映出皮、芯化学结构的差异。After ultrasonic etching treatment,the morphology and the chemical constitution difference between the skin and the core of the stabilized fibers from different temperature zones were studied by SEM and Raman spectrum respectively.The fibers stabilized at 195-225℃ had low stability,in which almost no difference in structure appeared between the skin and the core.The core in the fibers stabilized at 235-265℃ was dissolved by ultrasonic etching due to lower stability compared with the skin,which led to significant morphology difference between the skin and the core.After stabilized at 275℃,the stabilization of the core was improved,and the skin and the core showed infusibility.The characteristic Raman-scattering peaks of graphite broadened in the final stabilized fibers,while the peaks of the skin was broader,indicating the chemical constitution difference between the skin and the core.

关 键 词：聚丙烯腈纤维 预氧化 超声蚀刻 皮芯结构 化学结构 

分 类 号：TQ342.741[化学工程—化纤工业]