Abstract

Single-walled carbon nanotube (SWCNT) fibers are promising lightweight materials with high mechanical strength and high electrical conductivity. In a previous report, we showed a clear correlation between the fiber properties and the effective tube length of the constituent SWCNTs. According to the results, the dispersion conditions of SWCNTs in aqueous solutions were improved by changing the surfactants and dispersion methods used to prevent the reduction of their length during fiber processing. Systematic studies revealed that the mechanical properties and electrical conductivity of the SWCNT fibers were improved by decreasing their cross-sectional area and increasing the effective length of the SWCNTs.

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