CAJ | 학술논문

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。
채용 HNO3대국산 PAN 기탄섬유진행표면개성처리。채용양담경련측의、XPS、FTIR、Raman、SEM검측개성후탄섬유표면활성기단화미관결구적변화。결과표명：경55℃양화처리후，섬유질량감소；이경80℃화100℃처리후，섬유질량증가。양화처리후，섬유정체화표면적양함량도증가，정체적양함량명현저우표면，이증폭각고우표면。재양화과정중，—OH、C—O、C=O、COOR급필정형담、사개담、—NO2적생성여전변동시발생，형성료저활성기단향고활성기단전변적동태과정，차수양화온도승고혹시간연장，섬유표면무서도강저。
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.