標題: | Bamboo-like nanostructures prepared using template-based wetting methods: Molecular arrangements of polyimide and carbon tubes in cylindrical nanopores |
作者: | Tu, Yi-Hsuan Liu, Chih-Ting Chu, Chien-Wei He, Hung-Chieh Chang, Chun-Wei Chen, Jiun-Tai 交大名義發表 應用化學系 National Chiao Tung University Department of Applied Chemistry |
關鍵字: | Anodic;aluminum oxide;Polyimide;Solution wetting method |
公開日期: | 17-十二月-2019 |
摘要: | With excellent mechanical and physical properties, polyimides (PIs) possess diverse applications in different fields. PI-based materials can also be converted to carbon materials by high temperature carbonization processes. The fabrication and properties of PI-based nanomaterials and corresponding carbon nanomaterials, however, have been less investigated, especially the packing behaviors of the polymer chains. In this work, we study the fabrication and characterization of PI nanostructures using the solution wetting (SW) method and the solvent-annealing-induced nanowetting in templates (SAINT) method. Poly(amic acid) (PAA) tubes are first prepared using anodic aluminum oxide (AAO) membranes. After thermal imidization and carbonization processes, PI and carbon tubes can be obtained, respectively. Bamboo-like structures are also observed in the tubes, which can be attributed to the Marangoni effect induced by the gradient of the surface tensions during the solvent evaporation process. Moreover, the laser Raman micro-spectroscopy results show that the packing behaviors of the polymer chains in the nanostructures prepared by the SAINT method are better than those prepared by the SW method, indicating that the solvent annealing process can improve the chain packing while assisting the infiltration of polymer chains in the nanopores. |
URI: | http://dx.doi.org/10.1016/j.polymer.2019.121979 http://hdl.handle.net/11536/153357 |
ISSN: | 0032-3861 |
DOI: | 10.1016/j.polymer.2019.121979 |
期刊: | POLYMER |
Volume: | 185 |
起始頁: | 0 |
結束頁: | 0 |
顯示於類別: | 期刊論文 |