ZrO2 nanocomposites from polyzirconosiloxanes
| Autor: | Isabel M. Miranda Salvado, Maria Helena Fernandes, Tsvetelina I. Gerganova, Yordanka Y. Ivanova, Yuliya Vueva |
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| Rok vydání: | 2010 |
| Předmět: |
Zirconium
Materials science Trimethylsilyl chemistry.chemical_element Isocyanate Industrial and Manufacturing Engineering law.invention chemistry.chemical_compound chemistry law Cubic zirconia Composite material Fourier transform infrared spectroscopy Crystallization Hybrid material Nuclear chemistry Sol-gel |
| Zdroj: | International Journal of Nanomanufacturing. 5:152 |
| ISSN: | 1746-9406 1746-9392 |
| DOI: | 10.1504/ijnm.2010.029932 |
| Popis: | Polyzirconosiloxanes were synthesised trough the hydrolytic co-condensation of tetraethoxysilane (TEOS), methyltriethoxysilane (MTES) and zirconium isopropoxide (ZIP) (Process A) or tetramethoxysilane (TMOS), trimethylsilyl isocyanate (TMSI) and ZIP (Process B). In both processes, ethylacetoacetat was added to provide ethylacetato derivatives of polyzirconosyloxanes. When the obtained hybrids were subjected to heat treatment, the zirconia component crystallises in nano size. The XRD, FTIR and 29Si NMR showed that the crystallisation depends on the random and block sequence in the main chain of the polyzirconosiloxanes derived from Processes A and B, respectively. |
| Databáze: | OpenAIRE |
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