Dispersion Stability of Single-Walled Carbon Nanotubes Using Nafion in Bisolvent
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- 作者：Jin-Hyon Lee ; Ungyu Paik ; Jae-Young Choi ; Ki Kang Kim ; Seon-Mi Yoon ; Jeonghee Lee ; Byung-Ki Kim ; Jong Min Kim ; Min Ho Park ; Cheol Woong Yang ; Kay Hyeok An ; Young Hee Lee
- 刊名：Journal of Physical Chemistry C
- 出版年：2007
- 出版时间：February 15, 2007
- 年：2007
- 卷：111
- 期：6
- 页码：2477 - 2483
- 全文大小：366K
- 年卷期：v.111,no.6(February 15, 2007)
- ISSN：1932-7455
文摘
We have investigated the effect of Nafion and its resulting interaction with single-walled carbon nanotubes(SWCNTs) on the solubility and dispersion properties of SWCNTs in bisolvent. Nafion was used as a polymericdispersant, providing both electrostatic and steric stabilization in the preparation of a stable and homogeneoussuspension of SWCNTs. A correlation was made between solubility and nanodispersion of SWCNTs. Opticalspectroscopy showed that the solubility and nanodispersion of SWCNTs increased with the addition of1-propanol and were greatest at a volume mixture of water/1-propanol of 80/20. We propose a mechanism ofimproved solubility and nanodispersion of SWCNTs, which is strongly correlated with the adsorption behaviorof Nafion on SWCNTs, the surface potential of SWCNTs, and the solubility of Nafion in a liquid medium;amphiphilic Nafion enhances the dispersion of SWCNTs in the mixture of hydrophilic water and relativelyhydrophobic 1-propanol.