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https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2005, Volume 56, Issue 10,





The Study of the Interaction between Nonionic Surfactants of the Alkyl Polyglucoside Type with Acid Dyes

Abstract:

The study of the interaction between nonionic surfactants and acid dyes is very important in clarifying the mechanism of wool dyeing and colors preservation and also for the washing conditions determination. It was examined the possibility of the formation of the complexes between a series of acid dyes, newly synthesized, from the class of azoic dyes derived from 3H-aza-1-oxa-2H-tioxo-5,8-phenalendisulfonic acid and a nonionic surfactant from the class of the alkyl polyglucosides. The nonionic surfactant is part of the category of the surfactants obtained from vegetable sources, with a soft action upon the wool fibers. The formation of the complexes was determined by the surface tension method and by the UV -VIS spectrophotometry. The tensiometric method has the advantage that the surfactant can be monitored - dye interaction over a large scale of concentrations. The formation of some surfactant- dye complexes was made evident in the different molecular ratios in the submicellar zone compared to the micellar zone of concentration of the surfactant. There are different equilibria in the system which compete one another over a large scale of surfactant concentration (adsorption, micellisation, small complex formation, large complex -mixed micelles formation). Keywords: alkyl polyglucosides, acid dyes, surface tension, spectrometry UV-VIS


Issue: 2005, Volume 56, Issue 10
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