ISSN:
1573-4846
Keywords:
gelation mechanism
;
structural evolution
;
formamide
;
FTIR
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract We investigated the influence of formamide on the acid-catalyzed sol-gel process at 40°C, by Fourier transformed infrared spectroscopy. Two silica sols were studied: one containing formamide and one without. Following the time evolution of both the Si−O(H) stretching vibration at around 950 cm−1 and the Si−O(−Si) vibration between 1080 and 1200 cm−1, we were able to describe the structural evolution of each sol. We thus observed, in the case of the formamide containing sol, a peculiar two-step structural evolution which eventually resulted in a highly interconnected gel.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02436838
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