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11


Teoret. i eksperim. khimiya. 2004. Vol.40 No. 1. p. 57-61

Influence of Hydration - Dehydration Processes

on Structure and Porosity of the Detemplated Silica Fibres

 

V. V. Kovalenko, G. M. Telbiz, F. M. Bobonych


L. V. Pysarzhevsky Institute of Physical Chemistry, National Academy of Sciences of Ukraine

31 Prosp. Nauky, 03028 Kyiv, Ukraine. e-mail: molsieves@alfacom.net


The influence of the conditions of elimination of template (calcination, extraction by solvents) and the processes of hydration-dehydration on hexagonal structure and porosity of detemplated fibers was in- vestigated. It is shown that the realization of the hydration-dehydration cycle results in the decrease of the porosity of the fibers, which is especially essential in the detemplation of fibers by the extraction of surfactant by solvents (ethanol, acetic acid).


Key words: mesoporous silica fibres, dehydration, structure, porosity.