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A microscopical study of the pathway for diffusion of rhodamine B and octadecylrhodamine B into wool fibres *
Author(s) -
Sideris V,
Holt L A,
Leaver I H
Publication year - 1990
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1990.tb01251.x
Subject(s) - dyeing , aqueous solution , solvent , rhodamine b , wool , penetration (warfare) , membrane , chemistry , staining , rhodamine , diffusion , anhydrous , chemical engineering , biophysics , fluorescence , polymer chemistry , chromatography , materials science , organic chemistry , biochemistry , composite material , biology , physics , thermodynamics , photocatalysis , operations research , quantum mechanics , engineering , genetics , catalysis
The pathways for the diffusion of the basic dyes rhodamine B and octadecylrhodamine B into wool under aqueous and non–aqueous dyeing conditions have been investigated. The distribution of each dye within the fibre at various stages of the dyeing process was monitored by fluorescence microscopy. By judicious choice of solvent system and treatment time, the dyes could be directed into different histological components of the fibre. Intercellular diffusion, involving passage of the dye through the cell membrane complex between the cortical cells, was generally the preferred route for penetration of the fibre. The distribution patterns of the two dyes differed markedly and were strongly dependent upon the solvent composition. Whilst selective staining of the cell membrane complex occurred in an anhydrous solvent system, preferential staining of that region of the cell membrane complex associated with the orthocortex resulted when the dyes were applied from aqueous alcohol systems.