期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 140, 期 2-3, 页码 499-507出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2013.03.060
关键词
Polymers; Composite Materials; Magnetic Materials; Nanostructures; Electrical Conductivity; Dielectric Properties
资金
- Ministerio de Ciencia e Innovacion (Spain) [MAT2010-17091, MAT2009-06296E]
- Research Center for Exotic Nanocarbons
- Japan regional Innovation Strategy Program by the Excellence, JST
- CDTI under the project NANOMULFUN [SAE-20081035]
We report a novel method that is able to efficiently functionalize carbon nanotubes (few-walled: from 1 to 6 layers and multiwalled) with a high yield of carboxyl groups, based on treatments with H2O2 in the presence of UV light. The amount of carboxylic groups was quantified by X-ray photoelectron spectroscopy and back-titration, showing both measurements reasonable agreement. According to the zeta potential values and to the amount of suspended nanotubes, we demonstrate that the method is able to produce uniform and stable suspensions of carbon nanotubes in water. With the aid of scanning and transmission electron microscopy, thermogravimetric analysis, and Raman spectroscopy, we show that the surfaces of the tubes are not damaged by the treatment and that the functionalized tubes have an enhanced reactivity toward oxygen. This route is efficient and could now be used to fabricate polymer composites using few-walled and multiwalled carbon nanotubes. (C) 2013 Elsevier B.V. All rights reserved.
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