Fast Microwave-Assisted Purification, Functionalization and Dispersion of Multi-Walled Carbon Nanotubes
Fast Microwave-Assisted Purification, Functionalization and Dispersion of Multi-Walled Carbon Nanotubes
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DOI：
10.1166/jnn.2008.215
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发表时间：
2008-11-01
影响因子：
--
通讯作者：
Mitra, Somenath
中科院分区：
文献类型：
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作者：
Chen, Yuhong;Mitra, Somenath
报道了多壁碳纳米管（MWNTs）的微波辅助纯化、化学功能化和分散。为了防止边壁官能化，使用弱、稀酸和络合剂去除残余催化剂。通过将亲水性基团连接到侧壁上进一步进行共价衍生化，提高了水的分散性，在去离子水中达到1mg /mL，在乙醇中达到0.5 mg/mL。含有-COOH的氧化MWNTs可用于进一步功能化，如酰胺化。与单壁碳纳米管（SWNTs）相比，MWNTs的反应性和溶解度更低。利用电子显微镜、傅里叶变换红外光谱、热重分析和原子吸收光谱研究对目标纳米碳纳米管进行了表征。
Microwave-assisted purification, chemical functionalization and dispersion of multi-walled carbon nanotubes (MWNTs) are reported. To prevent sidewall functionalization, removal of residual catalyst was carried out using weak, dilute acids and complexing agents. Further covalent derivatization by attaching hydrophilic groups to the sidewall improved aqueous dispersibility to reach 1 mg/mL in deionized water and 0.5 mg/mL in ethanol. Oxidized MWNTs containing -COOH could be used for further functionalization, such as, amidation. The MWNTs were found to be less reactive and had lower solubility than the single-walled carbon nanotubes (SWNTs). Electron microscopy, Fourier Transform Infrared Spectroscopy, Thermogravimetric Analyses and Atomic Absorption spectrometry studies were used to characterize the aimed-MWNTs.