Effect of Titanium Tetrachloride Used for Obtaining Powdered Cellulose on the Acid-Base Properties of Its Suspensions
S. V. FROLOVA, L. A. KUVSHINOVA, M. A. RYAZANOV and A. V. KUCHIN
Institute of Chemistry, Komi Science Centre, Ural Branch of the Russian Academy of Sciences,
Ul. Pervomayskaya 48, Syktyvkar 167982 (Russia)
frolova-sv@chemi.komisc.ru
Keywords: powdered cellulose, MCC, cellulose suspension, Lewis acid, titanium tetrachloride, ion-exchange capacity, pK spectroscopy
Pages: 205–209
Abstract
For the first time a pK spectroscopy technique was applied to study the influence of Lewis acids upon changing the acid-base properties of cellulose suspensions. Basing on the cellulose pK spectra obtained before and after the modification in the solution of titanium tetrachloride, it was demonstrated that the action of titanium tetrachloride on the cellulose results in weakening the bonds between hydrogen ions and appropriate acid-base groups, thereby the number of these groups remain unchanged. The powdered cellulose obtained under the influence of titanium tetrachloride differs from the original (fibrous) one in a high ion exchange capacity.
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