Coagulation engineering of surfactant-based wet spinning of carbon nanotube fibers

• Published in: Carbon Letters Vol. 34; no. 6; pp. 1803 - 1815
• Main Authors: Jeong, Yun Ho, Im, Jaegyun, Lee, Dong-Myeong, Kim, Min Chan, Oh, Daehan, Son, Jeonghyeon, Park, Seunggyu, Hyun, Kyu, Jeong, Beomjin, Lee, Jaegeun
• Format: Journal Article
• Language: English
• Published: Singapore Springer Nature Singapore 01.07.2024; 한국탄소학회; Springer Nature B.V
• Subjects: Acids; Carbon; Carbon nanotubes; Cavitation; Characterization and Evaluation of Materials; Chemistry and Materials Science; Coagulants; Coagulation; Commercialization; Composition; Electrons; Ethanol; Fibers; Mass transfer; Materials Engineering; Materials Science; Nanotechnology; Original Article; Parameters; Sodium; Solvents; Surfactants; Thermodynamics; Viscosity; Wet spinning; 자연과학일반; South Korea; Seoul South Korea; United States > US; Japan; Mass transfer rate difference; Carbon nanotube fiber; Surfactant; Wet spinning; Coagulation
• ISSN: 1976-4251; 2233-4998
• DOI: 10.1007/s42823-024-00735-z

One of the key challenges for the commercialization of carbon nanotube fibers (CNTFs) is their large-scale economic production. Among CNTF spinning methods, surfactant-based wet spinning is one of the promising techniques for mass producing CNTFs. Here, we investigated how the coagulation bath composition affects the spinnability and the properties of CNTFs in surfactant-based wet spinning. We used acetone, DMAc, ethanol, and IPA as coagulants and analyzed the relationship between coagulation bath composition and the properties of CNTFs in terms of kinetic and thermodynamic coagulation parameters. From a kinetic perspective, we found that a low mass transfer rate difference (MTRD) is favorable for wet spinning. Based on this finding, we mixed the coagulant bath with solvent in a proper ratio to reduce the MTRD, which generally improved the wet spinning. We also showed that the coagulation strength, a thermodynamic parameter, should be considered. We believe that our research can contribute to establishment of surfactant-based wet spinning of CNTFs.