Abstract
The formation of a mesostructured silicate material of the MCM-41 type is studied. The influence of the replacement of components in a reaction medium is investigated experimentally. Analysis of the results obtained and the data available in the literature suggests that the process under investigation is based on the approximate stoichiometric supramolecular interaction between [Si4O4 + x (OH)9 − x ]−(1 + x) silicate polyanions and C16H33(CH3)3N+ cetyltrimethylammonium cations with the formation of supramolecular aggregates, which condense to a mesostructured organosilicate composite. A further evolution of the product involves hydrolysis of the inner surface and the polymerization of the inorganic component. It is demonstrated that the properties of the product are determined, to a large extent, by the components of the reaction medium, which control the relative reaction rates in the process. The inference is made that an alcohol-ammonia medium is the most optimum for alkaline synthesis. This medium provides good preparation of the initial components for the reaction and the high rate of hydrolysis of pore walls, minimizes the osmotic effects during hydrothermal treatment, and, eventually, favors the formation of a highly structured hydrothermally stable material.
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Original Russian Text Copyright © 2005 by Fizika i Khimiya Stekla, Kirik, Belousov, Parfenov, Vershinina.
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Kirik, S.D., Belousov, O.V., Parfenov, V.A. et al. System Approach to Analysis of the Role of the Synthesis Components and Stability of the MCM-41 Mesostructured Silicate Material. Glass Phys Chem 31, 439–451 (2005). https://doi.org/10.1007/s10720-005-0081-1
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DOI: https://doi.org/10.1007/s10720-005-0081-1