| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Purification of Carbon Nanotube Yarns via Incandescent Annealing |
| Author(s) |
Pouria Khanbolouki, Mehran Tehrani |
| On-Site Speaker (Planned) |
Pouria Khanbolouki |
| Abstract Scope |
This study presents a systematic investigation of carbon nanotube (CNT) yarn purification from its catalytic constituents and byproducts via an incandescent current induced annealing process in high vacuum. It is concluded that incandescent annealing can provide a low-energy alternative for purification of CNT structures from their catalytic constituents in a matter of seconds compared to thermal annealing at high temperatures, which takes hours. The difference is due to different impurity removal mechanisms involved in the two processes. The structural and morphological changes within the CNT yarns were investigated via scanning/transmission electron microscopy, energy dispersive spectroscopy, Raman spectroscopy, and thermogravimetric analysis. The morphological changes are correlated with the electrical property evolution of the CNT yarns. The impurity removal mechanisms, CNT doping mechanisms, and pros and cons of the current characterization methods for bulk CNT structures are discussed. |