Fast Microwave-Assisted Purification, Functionalization and Dispersion of Multi-Walled Carbon Nanotubes
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 attachinghydrophilic 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.
Keywords: FUNCTIONALIZATION; MULTIWALLED CARBON NANOTUBES; PURIFICATION
Document Type: Research Article
Publication date: 01 November 2008
- Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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