Carbonization of low thermal stability polymers at the interface of liquid metals
| Autor: | Shengxiang Cai, Chengchen Zhang, Lachlan Hyde, Jin Zhang, Kourosh Kalantar-zadeh, Salma Merhebi, Rodney S. Ruoff, Sean Lim, Arifur Rahim, Benjamin V. Cunning, Jianbo Tang, Andrea Merenda, Mohannad Mayyas, Francois-Marie Allioux, Mohammad B. Ghasemian, Maxime Maghe |
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| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Liquid metal Materials science Carbonization chemistry.chemical_element 02 engineering and technology General Chemistry Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Amorphous solid chemistry Chemical engineering Phase (matter) Melting point General Materials Science Thermal stability Gallium 0210 nano-technology |
| Zdroj: | Carbon. 171:938-945 |
| ISSN: | 0008-6223 |
| Popis: | Gallium and many of its alloys remain in liquid phase across impressively wide temperature ranges. Here such liquid metals are proposed as reaction media for the carbonization of low thermal stability polymeric precursors at high temperatures. Plain and cross-linked polyvinyl alcohol are chosen as representatives of such polymers. We show that due to the immiscibility of organic carbons within the liquid metal phase, these polymers that would otherwise vaporize at elevated temperatures, can function as precursors for the formation of carbonaceous films. The thin polymeric films are placed in an intimate contact with the liquid metal surface before thermal processing and show amorphous to graphitic-like characteristics after carbonization. Graphitic-like properties were obtained when a high melting point graphitization catalyst, such as copper, was co-alloyed. The proposed work can be expanded to explore other metallic elements within the bulk of gallium-based alloys for the carbonization of polymeric precursors at large-scales. |
| Databáze: | OpenAIRE |
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