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Journal of Nanomaterials
Volume 2013 (2013), Article ID 937697, 9 pages
Research Article

Purification and Functionalization of Single-Walled Carbon Nanotubes through Different Treatment Procedures

1General Education Center, Jen-Teh Junior College of Medicine, Nursing and Management, Houlong, Miaoli County 35664, Taiwan
2Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taiping, Taichung 41111, Taiwan
3Material Application Center, Industrial Technology Research Institute, Tainan 70955, Taiwan

Received 29 November 2012; Accepted 28 January 2013

Academic Editor: Anukorn Phuruangrat

Copyright © 2013 Peir-An Tsai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Single-walled carbon nanotubes (SWCNTs) were purified by the combined use of ultrasonic- and microwave-assisted acid digestion. The results show that the method efficiently eliminates impurities, reduces solvent consumption, and prevents damage to the structure of the SWCNTs. The purified SWCNTs were given functionalization treatments with a nitric acid/sulfuric acid mixture. These acid-treated SWCNTs (A-SWCNTs) were then grafted with 3-isocyanatopropyl triethoxysilane (A-SWCNTs-Si). The A-SWCNTs and A-SWCNTs-Si were used to improve interfacial interactions with polymers and to produce a well-dispersed SWCNT composite.