| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.502 |
| 발표분야 | 유ㆍ무기 나노섬유 소재 |
| 제목 | Fabrication of magnetic carbon nanotubes using a iron-doped polymer precursor |
| 초록 | Carbon nanotubes (CNTs) have received much attention over the past decade from the view point of scientific studies and industrial applications. A variety of CNT fabrications have been employed, such as electric arc discharge, laser ablation, chemical vapor deposition, electrolysis, pyrolysis of precursor molecules. Recently, encapsulation methods have been applied for the introduction of functional materials into CNTs for specific applications. Desired materials have been encapsulated inside CNTs via wet chemical insertion, capillary suction, in-situ arc discharge, etc. Magnetic components-encapsulated CNTs are useful for the purposes of magnetic data storage and nanoprobes in magnetic force microscopy. Herein, magnetic carbon nanotubes (MCNTs) were fabricated through the carbonization of iron-doped polypyrrole (PPy) nanotubes. First, iron-doped PPy nanotubes were fabrcated by chemical oxdiation polymerization using AOT reverse cylindrical micelle templating. During the synthetic porcess, the PPy nanotubes were impregnated with a considerable amount of iron-based species (FeCl4-). Subsequently, the carbonization of the polymer nanotubes resulted in the formation of MCNTs. It was found that the PPy nanotubes formed graphitic structures at mild carbonization temperature. In addition, MCNTs showed ferromagnetic behavior even at room temperature, and the main magnetic phase was γ-Fe2O3. The main advantage of this synthetic strategy is that the reverse microemulsion polymerization, followed by the carbonization process, makes it possible to fabricate MCNTs without using any specific template and encapsulation process. Our novel approach is expected to provide an alternative and facile route to allow the fabrication of CNTs and the introduction of desired materials into CNTs. |
| 저자 | 윤현석, 장정식 |
| 소속 | 서울대 화학생물공학부 |
| 키워드 | carbon nanotube; iron oxide; polypyrrole; AOT; polymer precursor |
