摘要
采用原位漫反射红外光谱(FT-IR)在线分析碳纤维表面谱图变化。结果发现,当温度升至500℃后,3260cm-1处吸收峰减弱,在3157cm-1、3048cm-1、2829cm-1和1405cm-1处新增吸收峰。用X-射线光电子能谱(XPS)对未处理与在氨气气氛中600℃处理30s后碳纤维的表面官能团组成进行分析对比发现,处理后的碳纤维表面氮元素显著增加,而氧含量降低。由FT-IR和XPS的谱图变化推测出在高温时,碳纤维表面的羟基和羧基与氨气发生反应,形成了氨基官能团。
The changes of infrared spectra for the surface of carbon fibers （CFs） were investigated on-line by Fr-IR. When the reaction temperature exceeded 500 ℃, the strength of absorption peak at 3 260 cm^-1 decreased and new characteristic peaks at 3 157 cm^-1, 3 048 cm^-1, 2 829 cm^-1 and 1 405 cm^-1 appeared. After been treated by free ammonia at 600 ℃ for 30 s, functional groups on the surface of the treated CFs and the untreated ones were contrasted by X-ray photoelectron spectroscopy （XPS） . The nitrogen content on the surface was found to increase, while the oxygen content decreased. Concerning the changes in XPS and Fr-IR spectra, it supposed that the hydroxyl and carboxyl on the surface of CFs had reacted with free ammonia at high temperature, which introduced amino groups to the surface of CFs.
出处
《合成纤维》
CAS
北大核心
2008年第6期9-12,共4页
Synthetic Fiber in China
基金
973项目(编号:2006CB605304)
国家自然科学基金项目(编号:50604025)
关键词
碳纤维
表面处理
氨气
氨基
carbon fiber, surface treatment, free ammonia, amino group
