Structural analysis of embedding polyethylene glycol in silica aerogel
| Autor: | Yuji Suzuki, Sana Ullah, Jiri Militky, Yuanfeng Wang, Jakub Wiener, Guocheng Zhu, Juming Yao, Ick Soo Kim, Jana Karpíšková, Tao Yang, Kai Yang, Mohanapriya Venkataraman |
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| Rok vydání: | 2021 |
| Předmět: |
Aqueous solution
Materials science technology industry and agriculture Aerogel 02 engineering and technology General Chemistry Polyethylene glycol 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Crystallinity Adsorption chemistry Chemical engineering Mechanics of Materials Desorption PEG ratio General Materials Science 0210 nano-technology BET theory |
| Zdroj: | Microporous and Mesoporous Materials. 310:110636 |
| ISSN: | 1387-1811 |
| Popis: | Embedding of the functional materials into aerogel powders was realized via the filtration method. In this work, the effect of aerogel on the molecule structure of the embedded polyethylene glycol (PEG) was investigated by dispersing aerogel powders in 20 wt% PEG aqueous solution with subsequent filtration method. The encapsulation of the PEG in the aerogel was characterized by isothermal nitrogen (N2) adsorption/desorption. The structure of the embedded PEG in the aerogel powders was investigated via SEM-EDS, FE-SEM, FT-IR, XRD. TG-DTA, DSC, and leakage test. It was found that the only physical capillary force worked to adsorb PEG molecules from its solution by the aerogel powders. The BET surface area and the DFT pore volume of the PEG/aerogel powders were reduced obviously when compared with pure aerogel powders. The ability of the pores in the aerogel powders ranging from 14 nm to 16 nm to adsorbing the PEG molecules from the water system was weak. The crystallinity of the PEG was significantly reduced because of the limited space for crystal growth, and the decomposed temperature and thermal capacity decreased correspondingly. |
| Databáze: | OpenAIRE |
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