Pathways for dye diffusion in wool fibers

The most prominent view of the diffusion mechanism of dyes into wool fibers assumes that the molecules primarily enter the fiber in a fast process along the cell membrane complex (CMC), that is, by an intercellular mechanism. From the CMC, they are subsequently distributed in a slower process throug...

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Bibliographic Details
Published in:Textile research journal 1997-10, Vol.67 (10), p.720-724
Main Authors: Wortmann, F.J. (Deutches Wollforschungsinstitut a.d. RWTH Aachen e.V., Aachen, Germany.), Wortmann, G, Zahn, H
Format: Article
Language:English
Subjects:
cell membrane complex-diffusion model
CELL MEMBRANES
COLORANT
COLORANTES
DIFFUSION
DIFUSION
DYES
FIBRAS TEXTILES
FIBRE TEXTILE
FLUORESCENT DYES
heavy metal complex dyes
KERATIN
KERATINE
LAINE
LANA
MEMBRANAS CELULARES
MEMBRANE CELLULAIRE
MODELE
MODELOS
MORPHOLOGY
nonkeratinous fiber components
PROCESAMIENTO
PROCESSING
QUERATINAS
TEXTILE FIBRES
TRAITEMENT
WOOL
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Summary:The most prominent view of the diffusion mechanism of dyes into wool fibers assumes that the molecules primarily enter the fiber in a fast process along the cell membrane complex (CMC), that is, by an intercellular mechanism. From the CMC, they are subsequently distributed in a slower process throughout the other morphological components according to their respective diffusion coefficients and dye affinities. This view, referred to here as the CMC-diffusion model, is based on investigations of the diffusion performance of heavy metal complex and fluorescent dyes under anhydrous and aqueous conditions. An evaluation of various key aspects of the evidence for this model suggests that, due to differences in the glass transition and fluorescence quenching performance of the various morphological components in a wool fiber, there is, in fact, little evidence to support the CMC-diffusion model. Instead, the evidence supports the alternative, more general view that under normal dyeing conditions, diffusion proceeds primarily by means of all the nonkeratinous components of the wool fiber according to a restricted transcellular diffusion mechanism.
ISSN:0040-5175
1746-7748
DOI:10.1177/004051759706701004