Transparent flexible conductor of poly(methyl methacrylate) containing highly-dispersed multiwalled carbon nanotube
SCIE
SCOPUS
- Title
- Transparent flexible conductor of poly(methyl methacrylate) containing highly-dispersed multiwalled carbon nanotube
- Authors
- Kim, DO; Lee, MH; Lee, JH; Lee, TW; Kim, KJ; Lee, YK; Kim, T; Choi, HR; Koo, JC; Nam, JD
- Date Issued
- 2008-02
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- Multiwalled carbon nanotubes (MWCNTs) were incorporated into a poly(methyl methacrylate) (PMMA) solution to develop a transparent and flexible composite conductive film. Monitoring the MWCNT-granule size in the PMMA solutions as well as after the film casting, the self-aggregation of MWCNTs was thoroughly investigated to provide a highly-dispersed polymeric conductor. In addition to the degree of acid treatment of MWCNTs, the dipole moment of solvent and the random-coil length of polymer were considered to be the key factors for the MWCNTs to retain the highly-dispersed state in the polymer matrix after solidification. Investigating several solvent systems, dimethylformamide was found to have the best dispersing capability for the MWCNT/PMMA system to give a surface electrical conductivity up to 10(-2) S/cm at ca. 3.0 wt% of MWCNT, which was considered to be well above what had been reported for such a low level of MWCNT loading, with a light transmittance over 95%. Finally, the polymer-rich layer, which is usually formed on the coating surface due to the surface tension and wetting characteristics of the MWCNT/PMMA mixture, was mechanically peeled off to give an increase in electrical conductivity of nearly two orders of magnitude. (c) 2007 Elsevier B.V. All rights reserved.
- Keywords
- multiwalled carbon nanotubes (MWCNTs); conductive polymer film; dispersion; conductivity; percolation; ELECTRICAL-CONDUCTIVITY; FIELD-EMISSION; COMPOSITES; FUNCTIONALIZATION; POLYMERIZATION; NANOCOMPOSITES; STABILITY
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/28857
- DOI
- 10.1016/J.ORGEL.2007
- ISSN
- 1566-1199
- Article Type
- Article
- Citation
- ORGANIC ELECTRONICS, vol. 9, no. 1, page. 1 - 13, 2008-02
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