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摘要: 为了在碳纳米管上引入胺基团，先对CVD法制备的多壁碳纳米管进行了有效的纯化和功能化，用TEM观察了纯化过程中的杂质变化和碳纳米管的形态结构，然后用二环己基碳二亚胺（DCC）缩合剂使功能化了的多壁碳管和乙二胺反应，并采用FT-IR红外光谱和Raman光谱对反应前后的碳管进行了表征。红外光谱测试结果表明：反应前红外光谱中在1709cm-1处有羧基的吸收峰，说明碳纳米管的端口及侧壁已被有效功能化；反应后在1581cm-1出现吸收峰表明二者通过酰胺键连接起来，增强了碳纳米管在有机溶剂中的溶解性；Raman光谱中反应前后D峰和G峰无明显区别，表明反应前后碳纳米管结构未发生变化。
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关键词:
- 碳纳米管,纯化,化学修饰,缩合反应
Abstract: The decoration of carbon nanotubes with amine groups by reacting with diamine was investigated by TEM, FT-IR and Raman spectroscopy after multi-walled carbon nanotubes (MWNTs) synthesized by chemical vapor deposition (CVD) had been purified and oxidized to contain carboxylate groups. It is found that the ends and side-walls of MWNTs are opened and oxidized into carboxylate group (σ(C=O)＝1709cm-1), and the amide-alkyl chain appears on the derivatives of the MWNTs (σ(C=O)＝1581cm-1) and the solubility of MWNTs in organic solvent is enhanced. The Raman results show that the D line and G line of MWNTs have no obvious changes before and after the reaction, which indicate that MWNTs retain their structure after the condensation reaction. -
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