Effect of CNT Oxidation on the Processing and Properties of Superacid-Spun CNT Fibers.
Autor: | Cheng K; University of Science and Technology of China, School of Nano-Tech and Nano-Bionics, CHINA., Cheng L; Chinese Academy of Sciences Suzhou Institute of Nano-tech and Nano-Bionics, Innovation Center for Advanced Nanocomposites (ICAN), 215123, CHINA., Jiang X; Chinese Academy of Sciences Suzhou Institute of Nano-tech and Nano-Bionics, Innovation Center for Advanced Nanocomposites (ICAN), CHINA., Wang Z; University of Science and Technology of China, School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, No.96, JinZhai Road Baohe Distric, 230026, Anhui Province, CHINA., Pan J; University of Science and Technology of China, School of Nano-Tech and Nano-Bionics, CHINA., Fang N; Chinese Academy of Sciences Suzhou Institute of Nano-tech and Nano-Bionics, Innovation Center for Advanced Nanocomposites (ICAN), CHINA., Zhang Z; Chinese Academy of Sciences Suzhou Institute of Nano-tech and Nano-Bionics, Innovation Center for Advanced Nanocomposites (ICAN), CHINA., Qu S; Chinese Academy of Sciences Suzhou Institute of Nano-tech and Nano-Bionics, Innovation Center for Advanced Nanocomposites (ICAN), Add: No. 398 Ruoshui Road, SEID, Jiangsu Province, CHINA., Lyu W; Chinese Academy of Sciences Suzhou Institute of Nano-tech and Nano-Bionics, Chinese Academy of Science, No. 398 Ruoshui Road, 215123, Suzhou, CHINA. |
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Jazyk: | angličtina |
Zdroj: | Chemistry, an Asian journal [Chem Asian J] 2024 Jul 10, pp. e202400327. Date of Electronic Publication: 2024 Jul 10. |
DOI: | 10.1002/asia.202400327 |
Abstrakt: | Spinning fibers from carbon nanotube (CNT)/superacid dispersions has emerged as a promising strategy for industrial-scale production of high-performance CNT fibers (CNTFs). The oxygen content and types of functional groups on CNT surfaces significantly influence dispersion, assembly processes, and fiber properties. In this study, Tuball-SWCNTs were purified and oxidized at varying levels. The dispersion behavior of CNTs with different oxidation levels in chlorosulfonic acid was systematically observed, and the mechanical properties of fibers spun from these dispersions were compared. By adjusting the dispersion concentration, highly oriented CNTFs were produced with a specific strength of 1.03 N/tex, a tensile strength of 1.59 GPa, and an electrical conductivity of 3.58 MS/m. Further investigations indicated that oxygen-containing functional groups decrease the coagulation rate, increasing the maximum draw ratio during spinning and improving CNT alignment in the fibers. Molecular dynamics simulations demonstrated that these functional groups (-OH, -COOH) enhance load transfer between CNTs through hydrogen bonding. This specific strength is the highest achieved using Tuball-SWCNTs for superacid-spun fibers, surpassing previous works due to the oxidation-controlled coagulation rate, enhanced fiber orientation, and improved load transfer via hydrogen bonding. This study provides insights for designing and optimizing high-performance CNTFs. (© 2024 Wiley‐VCH GmbH.) |
Databáze: | MEDLINE |
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