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The Partial Protection of Wool Against Photo–oxidation by Application of Reactive Dyes *
Author(s) -
BAUMANN HANNO
Publication year - 1974
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.1478-4408.1974.tb03192.x
Subject(s) - wool , chemistry , lysine , covalent bond , amino acid , cystine , histidine , degradation (telecommunications) , polymer chemistry , tyrosine , side chain , methionine , nuclear chemistry , cysteine , photochemistry , organic chemistry , materials science , biochemistry , polymer , telecommunications , computer science , composite material , enzyme
Wool dyed under different conditions was irradiated in a Xenotest apparatus in the presence of moist air. The photo–oxidative changes in the functional groups of the wool were investigated using an amino acid analyser. Undyed control samples were more decomposed than the dyed samples. In the presence of the dye, degradation of cystine, which is the amino acid essential for wool stability, was considerably less than in native wool. A smaller protective effect of the dye was observed on the wool side–chains lysine, histidine and tyrosine. With methionine, however, degradation was higher. Furthermore, numerous other amino–acid side–chains were decomposed in both dyed and blank samples, producing many degradation products. Aminoadipic acid was one of the oxidation products of lysine. The covalent bond between fibre and dye was stable under the irradiation conditions used.