Water-Dispersible Multiwalled Carbon Nanotubes Obtained from Citric-Acid-Assisted Oxygen Plasma FunctionalizationReportar como inadecuado




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Journal of Nanomaterials - Volume 2014 2014, Article ID 508192, 9 pages -

Research Article

Graduate School of Science & Technology, Shizuoka University, Shizuoka 422-8529, Japan

Department of Physics, Shizuoka University, Shizuoka 422-8529, Japan

Received 18 April 2014; Accepted 3 June 2014; Published 18 June 2014

Academic Editor: Shota Kuwahara

Copyright © 2014 Mohammad Jellur Rahman and Tetsu Mieno. 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.

Abstract

A new and safe method has been developed to functionalize multiwalled carbon nanotubes MWCNTs with fewer surface defects, which significantly increases their dispersibility in water. MWCNTs are pretreated in pure ethanol by a supersonic homogenizer. Then, the mixture is dried and soaked in weak citric acid solution. Finally, the MWCNTs in the citric acid solution are treated with radio frequency 13.56 MHz oxygen plasma. As a result, many carboxyl functional groups are attached onto the MWCNT surfaces and stable dispersion of the MWCNTs in water is obtained. The treatment conditions are optimized in this study.





Autor: Mohammad Jellur Rahman and Tetsu Mieno

Fuente: https://www.hindawi.com/



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