Chemical method for improving both the electrical conductivity and mechanical properties of carbon nanotube yarn via intramolecular cross-dehydrogenative coupling.
Chemical post-treatment of the carbon nanotube fiber (CNTF) was carried out via intramolecular cross-dehydrogenative coupling (ICDC) with FeCl3 at room temperature. The Raman intensity ratio of the G band to the D band (IG/ID ratio) of CNT fiber increased from 2.3 to 4.6 after ICDC reaction. From the XPS measurements, the AC═C/AC-C ratio of the CNT fiber increased from 3.6 to 4.8. It is of keen interest that both the electrical conductivity and tensile strength of CNT yarn improved to 3.5 × 10(3) S/cm and 420 MPa, which is 180 and 200% higher than that of neat CNT yarn.
Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Eunha-ri san 101, Bondong-eup, Wanju-gun, Jeolabuk-do 565-905, Korea.
Yong-Mun
YM
Choi
Hungo
H
Choo
Hyeonuk
H
Yeo
Nam-Ho
NH
You
Dong Su
DS
Lee
Bon-Cheol
BC
Ku
Hwan Chul
HC
Kim
Pill-Hoon
PH
Bong
Youngjin
Y
Jeong
Munju
M
Goh
D002244:Carbon / Q000737:chemistry*; D000077482:Carbon Fiber; D004553:Electric Conductivity; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013059:Spectrum Analysis, Raman
D000077482:Carbon Fiber; D037742:Nanotubes, Carbon; D002244:Carbon