Lee, Sung-Hyun Park, Junbeom Park, Ji Hong Lee, Dong-Myeong Lee, Anna Moon, Sook Young Lee, Sei Young Jeong, Hyeon Su Kim, Seung Min 2024-01-19T15:05:06Z 2024-01-19T15:05:06Z 2021-10-21 2021-03 0008-6223 https://pubs.kist.re.kr/handle/201004/117310 The deep-injection floating-catalyst chemical vapor deposition (DI-FCCVD) technique is introduced to continuously synthesize carbon nanotubes (CNTs) with high aspect ratio (AR>17000) and high crystal-linity (I-G/I-D > 60) at high production rate (>6 mg/min). In this technique all reactants are injected directly and rapidly into high-temperature reaction zone through thin alumina tube; this process leads to simultaneous thermal decomposition of well-mixed catalyst precursors (ferrocene and thiophene), and thus to formation of uniformly-sized catalyst particles. Carbon nanotube fiber (CNTF) fabricated from high-AR CNT has specific strength of 2.94 N/tex and specific modulus of 231 N/tex, which are comparable to those of the state-of-the-art carbon fiber. Both DI-FCCVD and wet spinning methods are easily scalable to mass production, so this study may enable widespread industrial application of CNTFs. (C) 2020 Elsevier Ltd. All rights reserved. English Pergamon Press Ltd. Deep-injection floating-catalyst chemical vapor deposition to continuously synthesize carbon nanotubes with high aspect ratio and high crystallinity Article 10.1016/j.carbon.2020.11.065 1 Carbon, v.173, pp.901 - 909 Carbon 173 901 909 N scie scopus 000613126400003 2-s2.0-85097330925 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article STRENGTH QUALITY SULFUR FIBERS GROWTH Carbon nanotube High-aspect ratio High-crystallinity Carbon nanotube fiber High-strength