Floating catalyst CVD 방법을 이용한 고품질 CNT의 연속 합성법 연구

Abstract

Carbon nanotubes (CNTs) have superior physical properties compared to other existing materials such as high strength, thermal conductivity and electrical conductivity, but they are not applicable to various industries due to the difficulty in processing due to their short length. Therefore, scientists have begun to study how to make CNTs in the form of fibers. The CNTs that can be scaled up to date are largely direct spinning and wet methods. The direct spinning method is a 1-step method in which CNTs are synthesized in a high-temperature heating furnace, while the spinning method is a multi-step method in which synthesized CNTs are dispersed mainly in a super strong acid solvent to spin the fibers. In this case, in order to manufacture high-quality CNT fibers in both methods, it is essential to manufacture high-quality CNTs having a small number of walls and a small diameter and a long length. In this study, we have discussed the method and mechanism of continuous production of CNT with high quality and productivity by using floating catalyst chemical vapor deposition (FC-CVD) method.