Methanol-assisted Synthesis of Carbon Nanotube Fibers and Its Mechanical Properties Investigation
QIU Yuncong1, SONG Yuanqiang1,2, LI Yali1
1 School of Materials Science and Engineering, Changzhou University, Changzhou 213000, Jiangsu, China 2 Institute of Flexible Electronics Technology of Tsinghua,Jiaxing 314000, Zhejiang, China
Abstract: Carbon sources and ferrocene are generally adopted in the presence of hydrogen for the successive synthesis of carbon nanotube fibers (CNFs) via floating catalytic chemical vapor deposition (FCCVD) process. This method requires a large amount of external hydrogen supply, which not only consumes valuable hydrogen energy, but also leads to high safety risks. As it can produce hydrogen by methanol decomposition at high temperature, in this studly methanol is added into carbon sources aiming for the substitution of hydrogen adoption in FCCVD process. It is found that, with the methanol/ethanol mixture as the carbon sources, CNFs can be produced successively in inert argon atmosphere when the volume ratio of methanol to ethanol is 6∶1. The IG/ID of the 532 nm Raman spectrum of the CNFs is 3.24, which confirms the good crystallinity of the composed CNTs. SEM result indicates that CNTs have preferential orientation in the fibers, thus leading to a high strength of 330 MPa. Furthermore,on the premise of the same effect, the efficiency of using methanol is 2.48 times of that of pure hydrogen. Thus this work provides an economical and safe method for the mass production of CNFs.
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2022, Vol. 36 
