Estimation of dispersion stability of UV/ozone treated multi-walled carbon nanotubes and their electrical properties
- Authors
- Kim, Seil; Lee, Young-In; Kim, Dong-Hwan; Lee, Kun-Jae; Kim, Bum-Sung; Hussain, Manwar; Choa, Yong-Ho
- Issue Date
- Jan-2013
- Publisher
- Pergamon Press Ltd.
- Keywords
- SINGLE-WALL; OXIDATION; ROUTE; SOLVENTS; HANSEN SOLUBILITY PARAMETERS; SURFACES
- Citation
- Carbon, v.51, pp.346 - 354
- Indexed
- SCIE
SCOPUS
- Journal Title
- Carbon
- Volume
- 51
- Start Page
- 346
- End Page
- 354
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/29228
- DOI
- 10.1016/j.carbon.2012.08.062
- ISSN
- 0008-6223
- Abstract
- Chemical functionalization of multi-walled carbon nanotubes (MWCNTs) was carried out by UV/ozone treatment. MWCNTs were characterized by elemental analysis, transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR) before and after treatment. The dispersion stability was investigated using UV-vis spectroscopy and a dispersion stability analyzer. Results confirmed the presence of oxygen-containing groups on the MWCNT surfaces by UV/ozone treatment resulting in dispersion stability better than for pristine MWCNTs in polar solvents. A simple method described to investigate the solubility behavior of MWCNTs functionalized with UV/ozone treatment in various organic solvents. To illustrate this concept, CNT dispersions were prepared using UV/ozone treatment with controlled times, and their solubility behavior was represented on three-dimensional graphs using Hansen solubility parameters. Based on these solubility data, a MWCNT/PMMA composite was prepared using an appropriate solvent and the sheet resistance was measured using a four-point probe method. As a result, composites made with MWCNTs having undergone UV/ozone treatment showed lower sheet resistance than CNT composites made from pristine or acid-treated MWCNTs. (C) 2012 Elsevier Ltd. All rights reserved.
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