| 新型ACNT/C纳米复合材料氧化性能的初步研究 |
| |
| 引用本文： | 李志,巩前明,梁吉,黄启忠,黄伯云.新型ACNT/C纳米复合材料氧化性能的初步研究[J].物理化学学报,2006,22(3):316-321. |
| |
| 作者姓名： | 李志 巩前明 梁吉 黄启忠 黄伯云 |
| |
| 作者单位： | Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P. R. China; State Key Laboratory for Powder Metallurgy, Central South University, Hunan 410083, P. R. China |
| |
| 摘 要： | 以定向碳纳米管阵列为骨架, 利用化学气相渗(CVI)工艺制备了新型的定向碳纳米管/炭(ACNT/C)纳米复合材料, 并对其氧化性能进行了初步的研究. SEM形貌观察表明, 氧化后的ACNT/C纳米复合材料仍然保持着其基本的管状结构特点, 氧化由外层热解炭向内逐渐进行. 热失重分析 (TGA)检测结果表明, 密度为0.80 g•cm-3的ACNT/C纳米复合材料在空气中的热失重转变温度约为720 ℃, 比相同工艺条件下制备的密度为1.5 g•cm-3的C/C复合材料提高了50 ℃左右. 静态空气等温氧化实验表明, ACNT/C纳米复合材料在550 ℃氧化过程中的化学反应速率明显低于C/C复合材料. 这主要是由于ACNT/C纳米复合材料具有稳定的界面和较高的晶化程度.
|
| 关 键 词： | 定向碳纳米管 C/C复合材料 纳米复合材料 氧化性能 |
| 收稿时间： | 2005-08-29 |
| 修稿时间： | 2005-10-27 |
Study on Oxidation Properties of New ACNT/C Nanocomposites |
| |
| LI,Zhi,GONG,Qian-Ming,LIANG,Ji,HUANG,Qi-Zhong,HUANG,Bai-Yun.Study on Oxidation Properties of New ACNT/C Nanocomposites[J].Acta Physico-Chimica Sinica,2006,22(3):316-321. |
| |
| Authors: | LI Zhi GONG Qian-Ming LIANG Ji HUANG Qi-Zhong HUANG Bai-Yun |
| |
| Institution: | Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P. R. China; State Key Laboratory for Powder Metallurgy, Central South University, Hunan 410083, P. R. China |
| |
| Abstract: | Aligned carbon nanotube/carbon (ACNT/C) nanocomposites were fabricated by traditional chemical vapor infiltration (CVI) technology. The oxidation properties and mechanism of ACNT/C nanocomposites were investigated through SEM, Raman, thermogravimetric analysis (TGA) and static isothermal oxidation. TGA result shows that weight loss temperature of ACNT/C nanocomposites (0.80 g•cm-3) is about 720 ℃, which is 50 ℃ higher than weight loss temperature of carbon/carbon(C/C) composites (1.5 g•cm-3) prepared in the same process. Static isothermal oxidation results further demonstrate that chemical reaction speed of ACNT/C nanocomposites is lower than that of C/C composites obviously in air oxidation process at 550 ℃. SEM micrographs prove that ACNT/C nanocomposites still keep tubular structure in the oxidation process, and the oxidation reaction proceeds from outer layer to inner layer along the radial direction. ACNT/C nanocomposites exhibit good oxidation properties due to stable interface and higher graphitization level. The oxidation mechanism of the nanocomposites is discussed. |
| |
| Keywords: | ACNTs C/C composites Nanocomposites Oxidation properties |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《物理化学学报》浏览原始摘要信息 |
| 点击此处可从《物理化学学报》下载免费的PDF全文 |
|
