| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 탄소나노튜브 및 고분자 복합재료 |
| 제목 | Fabrication of single walled carbon nanotubes (SWNTs)/polymer nanohybrid film with extremely high dielectric constant based on surface-tailored SWNTs with pyrene derivatives |
| 초록 | HiPco single walled carbon nanotubes (SWNTs) have been functionalized with pyrene derivatives of various alkyl chain length because the pyrenyl group is known to interact strongly with the sidewalls of SWNTs via π-stacking1, 2, while the long alkyl chain of the pyrene species can interact with the surrounding solvent sufficiently to overcome the large intertube van der Waals attraction energy3. AFM images presented a dramatic debundling of SWNTs facilitated by adsorption of pyrene derivatives. The attachment of pyrene with short alkyl chains on SWNTs caused no noticeable change in highly bundled state of SWNTs while a dramatic debundling to individual nanotubes along with extremely well dispersion in the solvent was obtained with increasing alkyl chain length over 12. The pyrene derivative modified SWNTs/urethane-epoxy nanohybrid films were made by solution casting, and their dielectric constants were measured via dielectric analysis. For nanohybrid films employing pyrene derivative-modified SWNTs, the films presented extraordinarily high effective dielectric constant (K＞100), even though the nanotube concentration was as low as below 0.01 wt%. (a) Pristine SWNTs (b) PyreneC12-SWNTs (c) PyreneC18-SWNTs Fig. 1. AFM images of SWNTs modified by pyrene derivatives with various alkyl chain. Reference 1. K. A. Shiral Fernando, Y. Lin, W. Wang, S. Kumar, B. Zhou, S. -Y. Xie, L. T. Cureton, Y. -P. Sun, J. Am. Chem. Soc., 126, 10234 (2004). 2. H. Paloniemi, T. Aaritalo, T. Laiho, H. Like, N. Kocharova, K. Haapakka, F. Terzi, R. Seeber, J. Lukkari, J. Phys. Chem. B, 109, 8634 (2005). 3. S. C. Rina, L. K. Yael, N. R. Einat, Y. R. Rachel, Langmuir, 20, 6085 (2004). |
| 저자 | 박혜진1, 장지영1, 김준경2, 이상수2 |
| 소속 | 1서울대, 2한국과학기술(연) |
| 키워드 | SWNTs; Pyrene derivatives; high K film |
