Formation conditions and composition of ionic complexes in dilute mixed solutions of chitosan and anionic dyes containing two or more sulfo groups were studied. Immediately after mixing the components, only one sulfo group of the dye interacts with chitosan to form a soluble complex of stoichiometric composition. With time, the other sulfo groups of the dye also become involved in the interaction, which results in the formation of an insoluble complex in which the dye behaves as cross-linking polyvalent anion.
Russian Journal of Applied Chemistry – Springer Journals
Published: May 23, 2013
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