Analysis of oxidation behavior of vapor-grown carbon fiber (VGCF) under dry air
Analysis of oxidation behavior of vapor-grown carbon fiber (VGCF) under dry air
复制标题
DOI：
10.1016/j.matlet.2016.05.184
复制
发表时间：
2016-10
影响因子：
3
通讯作者：
Kazumasa Nakamura;Yukô Satô;T. Takase
中科院分区：
文献类型：
--
作者：
Kazumasa Nakamura;Yukô Satô;T. Takase
采用X射线光电子能谱（XPS）、扫描电子显微镜（SEM）和热重分析（TG）研究了气相生长碳纤维（VGCF）在550-850 °C温度范围内的氧化行为。XPS测量显示在550和650 °C下氧化的纤维表面上存在高度氧化的物质。用扫描电镜观察了纤维表面腐蚀后的形貌变化。使用通过TG分析获得的氧化速率，计算出纤维氧化的表观活化能为149 kJ/mol。氧化反应是由表面反应控制的。
Oxidation behavior of vapor-grown carbon fiber (VGCF), which is similar to multi-walled carbon nanotube, was investigated within the temperature range of 550–850 °C with X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and thermogravimetry (TG) under dry air atmosphere. XPS measurements revealed the presence of highly oxidized species on the fiber surfaces oxidized at 550 and 650 °C. The corroded changes in the morphologies of the oxidized fiber surfaces were observed with SEM. The apparent activation energy for the oxidation of the fiber was calculated to 149 kJ/mol, using the oxidation rates obtained by TG analysis. The oxidation was the range controlled by surface reaction.