多壁碳纳米管的改性及其复合材料的制备  

Modification of Multiwall Carbon Nanotubes and Preparation of Multiwall Carbon Nanotubes/Alumina Precursor Composites

作　　者：许永[1] 

机构地区：[1]安徽理工大学材料科学与工程学院,安徽淮南232001

出　　处：《广州化工》2012年第1期3-5,8,共4页GuangZhou Chemical Industry

基　　金：高性能陶瓷与超微结构国家重点实验室开放基金项目(SKL200809SIC);国家自然科学青年基金项目(51002002)

摘　　要：用H2SO4/HNO3(体积比3∶1)对碳纳米管进行改性,结果研究表明:与原始碳纳米管相比,改性后的多壁碳纳米管的自身的分散性非常好,表面带有了更多的-OH和-COOH等官能团,碳纳米管在空气中的热稳定性明显下降,而且在碳酸氢铵与氨水和少量SDBS的混合溶液中分散稳定性更好。然后采用原位聚合的方法制备了多壁碳纳米管/碳酸铝铵复合材料,复合粉体的TEM和XRD表明改性后的多壁碳纳米管可以在碳酸铝铵粉体中进行良好的分散。A mixture of concentrated HNO3/H2SO4（3：1 by volume） was used to modify the multi-walled carbon nanotubes（MWCNTs）.The results indicated that compared with raw MWCNTs,the modified MWCNTs were well dispersed,there were more-OH and-COOH functional groups on the surface of the MWCNTs,the thermal stability of MWCNTs decreased largely in the air,and the modified MWCNTs can disperse uniformly in a mixture of saturated aqueous solution of NH4HCO3,NH3·H2O and little SDBS solution.After that,in-situ coating process was used to prepare MWCNTs/alumina precursor composites.The TEM and XRD of the composites powders indicated that the MWCNTs can disperse well in the alumina precursor powders.

关 键 词：多壁碳纳米管 改性 HNO3/H2SO4 氧化铝前躯体 

分 类 号：O646[理学—物理化学]