氧化聚丙烯腈纤维径向异质光学显微分析  

Evaluation of the Radial Heterogeneity of Oxidative Polyacrylonitrile Fibers by Optical Microscope

作　　者：严华 吕春祥[2] 常春报[1] 刘纳新 雷爱民 YAN Hua;LYU Chunxiang;CHANG Chunbao;LIU Naxin;LEI Aiming(Shanxi Gangke Carbon Materials Co.Ltd.,Taiyuan 030100;National Engineering Laboratory for Carbon Fiber Technology,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001)

机构地区：[1]山西钢科碳材料有限公司,太原030100 [2]中国科学院山西煤炭化学研究所,碳纤维制备技术国家工程实验室,太原030001

出　　处：《宇航材料工艺》2020年第6期76-81,共6页Aerospace Materials & Technology

基　　金：山西省自然科学基金(201701D121049);山西省揭榜招标项目(20191101004)。

摘　　要：为检测整束氧化聚丙烯腈纤维径向异质结构发育情况,迫切需要开发一种评价聚丙烯腈纤维是否均质氧化的检测方法。本文通过树脂包埋和研磨抛光制备用于光学分析的纤维试样,应用光学显微方法对比分析了两种类型氧化聚丙烯腈纤维径向异质结构演变过程,提出了氧化聚丙烯腈纤维径向异质结构演变模型。结果表明,TG300氧化聚丙烯腈纤维呈典型的径向异质结构,TG800氧化聚丙烯腈纤维径向异质结构不明显。随着氧化反应进行,纤维直径和碳含量逐渐降低,而氧含量逐渐上升。这说明光学显微分析可以用于氧化聚丙烯腈纤维是否均质氧化评价,可为得到均质氧化聚丙烯腈纤维提供分析检测手段。In order to determine the development of the radial heterogeneity of oxidative polyacrylonitrile fibers,it is urgent to develop a detection method for the evaluation of homogeneous oxidation of polyacrylonitrile fiber.In this paper,fiber samples are prepared by resin embedding and polishing technique for optical analysis.The evolution process of the radial heterogeneity of two kinds of oxidative polyacrylonitrile fibers were compared and analyzed by optical microscope.The evolution model was proposed for the radial heterogeneity of oxidative polyacrylonitrile fibers.The results proved that typical radial heterogeneity is present in TG300 oxidative polyacrylonitrile fibers.However,no obvious radial heterogeneity is found in TG800 oxidative polyacrylonitrile fibers.When the oxidation reaction proceed,the diameter and carbon content of fiber decrease and the oxygen content increase gradually.Therefore,the optical microscope can be applied in the evaluation of homogeneous oxidation of polyacrylonitrile fiber.A new detection method is provided for the manufacture of homogeneous oxidative polyacrylonitrile fibers.

关 键 词：聚丙烯腈纤维 氧化 径向异质 光学显微镜 

分 类 号：TQ342.[化学工程—化纤工业]