HNO3氧化改性对国产PAN基炭纤维表面成分和组织结构的影响  

Effect of HNO_3 oxidation treatment on surface components and structure of domestic PAN-based carbon fibers

作　　者：李婵 武帅[1] 刘云启[1] 吴皇 赵赟豪 易茂中[1] 葛毅成[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2015年第2期250-257,共8页Materials Science and Engineering of Powder Metallurgy

基　　金：国防项目

摘　　要：采用HNO3对国产PAN基炭纤维进行表面改性处理。采用氧氮氢联测仪、XPS、FTIR、Raman、SEM检测改性后炭纤维表面活性基团和微观结构的变化。结果表明:经55℃氧化处理后,纤维质量减小;而经80℃和100℃处理后,纤维质量增加。氧化处理后,纤维整体和表面的氧含量都增加,整体的氧含量明显低于表面,而增幅却高于表面。在氧化过程中,—OH、C—O、C=O、COOR及吡啶型氮、四价氮、—NO2的生成与转变同时发生,形成了低活性基团向高活性基团转变的动态过程,且随氧化温度升高或时间延长,纤维表面无序度降低。The domestic PAN-based carbon fiber was surface treated by nitric acid. The change of the surface active groups and microstructure were investigated by nitrogen -oxygen-hydrogen analyzer, X-ray photoelectron spectroscopy, Infrared spectrometry, Raman spectroscopy and Scanning Electron Microscope. The results indicate that the mass of carbon fiber decreases after the oxidation treatment at 55 ℃, but increases after treated at 80 ℃ and 100℃. By carbon fibers surface oxidation treatment, the total and the external oxygen concentration increase, and the overall content is significantly lower than the surface, while the growth is above the surface. The generation and transformation of -OH, C-O, C=O, COOR and pyridine moieties, quaternary nitrogen, oxidesed forms of nitrogen （-NO2） occured simultaneously, forming a dynamic process of groups transformation from low energy to high energy. With increasing oxidation temperature and time, the disorder degree of the carbon fibers surface decrease.

关 键 词：国产PAN炭纤维 氧化改性 官能团 微观结构 

分 类 号：TB332[一般工业技术—材料科学与工程]