Abstract 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 crystallinity (IG/ID>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.

中文翻译：

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深注射浮动催化剂化学气相沉积连续合成高纵横比高结晶度碳纳米管

摘要 引入深注射浮动催化剂化学气相沉积（DI-FCCVD）技术，以高产率连续合成高纵横比（AR>17000）和高结晶度（IG/ID>60）的碳纳米管（CNTs）。 (>6 毫克/分钟)。该工艺中所有反应物均通过细氧化铝管直接快速注入高温反应区；该过程导致充分混合的催化剂前体（二茂铁和噻吩）同时热分解，从而形成尺寸均匀的催化剂颗粒。由高 AR CNT 制成的碳纳米管纤维 (CNTF) 具有 2.94 N/tex 的比强度和 231 N/tex 的比模量，可与最先进的碳纤维相媲美。DI-FCCVD 和湿法纺丝方法都可以轻松扩展到大规模生产，