Structural stability of aluminosilicate inorganic polymers: influence of the preparation procedure

0371361 - ÚMCH 2012 RIV CZ eng J - Journal Article
Kobera, Libor - Slavík, R. - Koloušek, D. - Urbanová, Martina - Kotek, Jiří - Brus, Jiří
Structural stability of aluminosilicate inorganic polymers: influence of the preparation procedure.
Ceramics - Silikáty. Roč. 55, č. 4 (2011), s. 343-354. ISSN 0862-5468. E-ISSN 1804-5847
R&D Projects: GA AV ČR IAA400500602; GA ČR GAP108/10/1980
Institutional research plan: CEZ:AV0Z40500505
Keywords : aluminosilicate inorganic polymers * solid-state NMR * phase transformation
Subject RIV: CD - Macromolecular Chemistry
Impact factor: 0.382, year: 2011
http://www.ceramics-silikaty.cz/2011/2011_04_343.htm

The stability of amorphous aluminosilicate inorganic polymer systems (AIPs) with regard to the structural role of water molecules is discussed. Innovative approach to preparation of AIPs with amorphous and/or crystalline structure is introduced. It is shown that even small changes in the manufacture dramatically affect mechanical properties and the overall structural stability of AIPs. If the required quantity of water is admixed to the reaction mixture during the initial step of AIPs synthesis the resulting amorphous matrix undergoes extensive crystallization. If the amount of water is added to the reaction mixture during the last step of the preparation procedure, the AIP exhibits long-term stability. To find the structural reasons of the observed behavior a combination of traditional ssNMR, XRPD and TGA measurements were used. The applied experiments revealed that the structural stability of AIPs can be attributed to the tight binding of water molecules into the inorganic matrix.
Permanent Link: http://hdl.handle.net/11104/0006822