溶胶-凝胶法制备碳纳米管/SiO_2复合材料过程的TG-DSC-MS研究  

TG-DSC-MS Characterization for the Carbon Nanotube/SiO_2 Composites by Sol-Gel Method

作　　者：于惠梅[1] 陆昌伟[1] 宁金威[1] 

机构地区：[1]中科院上海硅酸盐研究所,上海200050

出　　处：《质谱学报》2004年第2期65-68,120,共5页Journal of Chinese Mass Spectrometry Society

摘　　要：利用热重 -差示扫描量热 -质谱 ( TG-DSC-MS)联用技术对溶胶 -凝胶 ( Sol-Gel)法热压烧结制备碳纳米管 ( CNT) /Si O2 复合材料过程中的热分解行为特性进行了表征研究。采用多离子检测模式预定测量热分解生成的 C+ ( m/z1 2 )、OH+ ( m/z1 7)、H2 O+ ( m/z1 8)、CO2 + ( m/z2 8)等 9种正离子。实验发现 :用溶胶 -凝胶法制备 CNT/Si O2 复合材料过程中 ,在 5 0 0℃以下生成 Si O2 ,CNT在 5 0 0～ 73 0℃左右氧化燃烧。在 5 0 0℃条件下煅烧 1 h,凝胶 Si O2 完全转变成玻璃粉。选择在 5 0 0℃条件下煅烧 CNT/Si O2 复合粉体 1 h可作为CNT/Si O2TG DSC MS(Thermogravimetry Differential Scanning Calorimetry Mass Spectrometry)coupling techniques were used to make a simultaneous characterizing study of the behavior for the carbon nanotube(CNT) reinforced SiO 2 composites during the process of thermal decomposition. Nine kinds of expected positive ions such as C + ( m/z 12), OH + ( m/z 17), H 2O + ( m/z 18), CO 2 + ( m/z 28), etc, were measured by multiple ion detection(MID). CNT/ SiO 2 composites were fabricated by hot pressure sintering the mixture powders by rapid sol gel method. The complete combustion of free carbon was presented at the temperature of about 500~730℃. Meanwhile, the preliminary exploration for the thermal decomposition mechanism of CNT/SiO 2 composites has also been done in this work. CNT/SiO 2 composites have been sintered under the temperature of 500℃ for 1h. It would be useful for the preparation of the CNT/SiO 2 composites.

关 键 词：碳纳米管/二氧化硅复合材料 溶胶-凝胶法 制备 热重-差示扫描量热-质谱 热分解 

分 类 号：O635.1[理学—高分子化学] O613.72[理学—化学]