Abstract
This study demonstrates that small amount of oxygen incorporated into carbon nanotubes (CNTs) during the purification process greatly increases their solubility in chlorosulfonic acid (CSA). Using as-purchased and unpurified CNT powders, the optimal purification process is established to significantly increase the solubility of CNTs in CSA, and spin CNT fibers with high mechanical strength (0.84 N tex−1) and electrical conductivity (1.4 MS m−1) from the CNT liquid crystal dope with high concentration of CNTs in CSA. The knowledge obtained here may guide development of a way to dissolve extremely long CNTs at high concentration and thereby to enable production of CNT fibers with ultimate properties.
Original language | English |
---|---|
Article number | 1701131 |
Journal | Small |
Volume | 13 |
Issue number | 38 |
DOIs | |
State | Published - 11 Oct 2017 |
Keywords
- carbon nanotube fiber
- liquid crystal
- oxidation
- protonation
- wet spinning