柠檬酸修饰碳纳米管及其分散性能
Modified Carbon Nanotubes with Citric Acid and Its Dispersion Properties
作者：陈传盛(中南大学 粉末冶金国家重点实验室, 湖南 长沙410083)；刘天贵(湖南大学 物理与微电子科学学院, 湖南 长沙 410082)；陈小华(长沙理工大学 材料科学与工程学院, 湖南 长沙 410076)
Author：(State Key Lab. for Powder Metallurgy,Central South Univ.,Changsha 410083,China)；(School of Physics and Microelectronics Sci., Hunan Univ., Changsha410082, China)；(College of Materials Sci. and Eng., Changsha Univ. of Sci. and Technol.,Changsha 410076, China)
收稿日期：2007-08-15 年卷（期）页码：2008,40(3):108-111
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：碳纳米管；修饰；柠檬酸；分散性能
Key words：carbon nanotubes; modification; citric acid; dispersion property
基金项目：国家自然科学基金资助项目(50372020; 59972031);中南大学博士后基金资助项目
中文摘要
采用硫酸和硝酸混合酸纯化碳纳米管,然后用氨水和柠檬酸处理纯化的碳纳米管,并运用透射电子显微镜和红外光谱表征碳纳米管的结构和形貌。另外,还研究了碳纳米管在水中的分散性能。光谱实验表明,经过混合酸处理不仅能够得到纯净的碳纳米管,而且能够在碳纳米管的表面引入丰富的羟基和羧基官能团。通过氨水处理和柠檬酸修饰,能够在碳纳米管表面引入氨基官能团和柠檬酸分子。分散实验显示,柠檬酸修饰提高了碳纳米管在水中的分散性能。
英文摘要
The multi-walled carbon nanotubes (MWNTs) were purified by immersing in a 3∶1 mixture of concentrated H2SO4 and HNO3, and then were treated with ammonia and citric acid (CA), respectively. The structure and image of MWNTs were measured by Infrareed spectrum and electron microscopes. Furthermore, their dispersion properties in aqueous solution were studied. The spectrum results showed that there are many oxygenated functional groups on the surface of the MWNTs, and the amidocyanogen and CA molecules were introduced onto the surface of MWNTs. The results of dispersion experiment illuminated that the dispersion ability of MWNTs in aqueous solution was significantly improved by modification of CA.
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