不同氧化体系处理对多壁碳纳米管的影响  

Effect of the treatment by different oxidation system on multiwalled carbon nanotubes

作　　者：刘济林[1] 吴桐山 伍小丽[1] 张杰元 陈宪宏[1,4] 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082 [2]上汽通用五菱汽车股份有限公司,广西柳州545007 [3]广州贝特新材料有限公司,广东广州510800 [4]湖南省高分子材料应用技术重点实验室,湖南长沙410001

出　　处：《功能材料》2011年第2期264-266,270,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50573019);湖南省科技计划资助项目(2006GK3102)

摘　　要：采用3种氧化体系(H2SO4/H2O2,H2SO4/K2Cr2O7,H2SO4/HNO3)对多壁碳纳米管(MWC-NTs)进行处理,通过红外光谱、拉曼光谱、热失重、滴定分析、Zeta电位激光粒度分析仪、透射电镜对氧化前后的样品进行表征。结果表明,氧化处理未明显破坏MWCNTs的管状结构,并在表面引入羧基官能团,滴定分析显示按上述氧化体系的顺序样品的表面羧基含量分别为0.95%,6.08%,9.2%;氧化后样品能在水相中形成较稳定的分散。Multiwalled carbon nanotubes（MWCNTs） were functionalized with three kinds of oxidation system（H2SO4/H2O2,H2SO4/K2Cr2O7,H2SO4/HNO3）,respectively.The samples were characterized by Fourier transform infrared spectroscopy（FT-IR）,Raman spectroscopy,transmission electron microscopy（TEM）,thermogravimetry analysis（TGA） and zeta potential measurement analyzer.The results show that the tubular structures of MWCNTs are not distinctly destroyed.In addition,carboxylic groups（—COOH） are induced onto the surface of MWCNTs,the corresponding amounts of carboxyl are determined as 0.95%,6.08% and 9.2% by acid-base titration according to the above sequence of oxidation system.Oxidized samples are dispersed in deionized water uniformly and stably.

关 键 词：多壁碳纳米管 氧化 羧基 ZETA电位 

分 类 号：TQ321[化学工程—合成树脂塑料工业]