Mechanochemical Interaction of Silicon Dioxide
with Organic Acids
I. A. VORSINA,В В T. F. GRIGORIEVA,В В A. P. BARINOVA andВ В N. Z. LYAKHOV
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences,
Ul. Kutateladze 18, Novosibirsk 6300128 (Russia),
grig@solid.nsc.ru
Keywords: mechanochemical activation, mechanochemical interaction, organic acids, silicon dioxide
Pages: 447–455
Abstract
The interaction of amorphous silicon oxide (aerosil) with organic acids during mechanical activation in high-energy ball mill was studied by means of IR spectroscopy. It was demonstrated that monomer molecules of mono-, polyhydric and aromatic acids get bound with aerosil through the molecules of adsorbed water: aerosil–adsorbed water–acid. Water molecules form rather strong hydrogen bonds with the basic surface centres in aerosil and with hydroxyls of carboxylic groups in monomer molecules of acids. Both basic and acidic surface centres of the carrier take part in the mechanochemical interaction with aerosil.
UDC 541.18.053+543.42
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