Study of the release of a microencapsulated acid dye in polyamide dyeing using mixed cationic liposomes

The main objective of this work was to increase the retarding effect of the acid dye Telon® Blue RR (C.I. Acid Blue 62; DyStar, Frankfurt, Germany) release on polyamide fibres dyeing by encapsulation of the dye in liposomes as an alternative to synthetic auxiliaries, in order to reduce effluent poll...

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Bibliographic Details
Published in:	Journal of liposome research Vol. 21; no. 2; pp. 151 - 157
Main Authors:	de Sousa, Isabel S.C., Castanheira, Elisabete M.S., Rocha Gomes, Jaime I.N., Real Oliveira, M. Elisabete C.D.
Format:	Journal Article
Language:	English
Published:	England Informa Healthcare 01-06-2011 Taylor & Francis
Subjects:	Bromides - chemistry Cations - chemistry Coloring Agents - chemistry Coloring Agents - metabolism Drug Compounding - methods Environmental Pollution - prevention & control Glycine max - chemistry Lecithins - chemistry Liposomes - chemistry nanotechnology Nanotechnology - methods Nylons - chemistry Quaternary Ammonium Compounds - chemistry Spectrometry, Fluorescence Sustained release Temperature
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Summary:	The main objective of this work was to increase the retarding effect of the acid dye Telon® Blue RR (C.I. Acid Blue 62; DyStar, Frankfurt, Germany) release on polyamide fibres dyeing by encapsulation of the dye in liposomes as an alternative to synthetic auxiliaries, in order to reduce effluent pollution. The retarding effect achieved with the use of mixed cationic liposomes of dioctadecyldimethylammonium bromide (DODAB)/soybean lecithin (containing a 10% molar fraction of DODAB) was better in comparison with either pure soybean lecithin liposomes or synthetic auxiliaries. The retarding effect of liposomes on the dye release was analysed through changes in the absorption and fluorescence spectra of the acid dye at different conditions. The effect of temperature (in the range of 25 °C - 70 °C) on the spectroscopic behaviour of the dye in the absence and in presence of polyamide was also studied, in order to simulate the dyeing conditions. Exhaustion curves obtained in dyeing experiments showed that, below 45 °C, the retarding effect of the mixed liposomes (lecithin/DODAB (9:1)) was similar to that of the auxiliaries, but better than the one of pure lecithin liposomes. At higher temperatures (above 45 °C), the system lecithin/DODAB presents a better performance, achieving a higher final exhaustion level when compared with the commercial leveling agent without losing the smoothing effect of lecithin.
ISSN:	0898-2104 1532-2394
DOI:	10.3109/08982104.2010.492478