界面活性剤水溶液中における, 1-4ジアミノアンスラキノンの光退色について

抄録

In order to investigate the effects of the surfactants on photo-fading of the aminoanthraquinone disperse dyes, the aqueous solutions of 1, 4-diaminoanthraquinone containing anionic surfactants, nonionic surfactants and polyoxyethylene glycol were exposed to light of the 400-watt high-pressure mercury-vapour lamp (Toshiba H 400 P) and rates of photo-fading of the dye were examined. The experimental results suggested the following:
(1) The photo-fading reaction of 1, 4-diaminoanthraquinone in the aqueous solutions is of the first order in the initial stage.
(2) Among the samples used in present work, sodium dodecyl sulfate, polyoxyethylene glycol and polyoxyethylene dodecylether accelerate the photo-fading reaction of the dye, while the other four retards the reaction more effectively in the order of sodium dodecylbenzene sulfonate < polyoxyethylene nonylphenylether < sodium butylnaphthalene sulfonate < sodium β-naphthalene sulfonate-formaldehyde condensate. This retardation effect may be attributed to the aromatic ring in these molecules and the naphthalene ring is more effective than benzene ring.
(3) The surfactants having aromatic ring exhibit twofold retardation effects on photo-fading reacttion of the dye i.e., the roles as the filter and as the inactivating agent for the activated dye by interacting with the dye.
(4) The retardation effect of sodium β-naphthalene sulfonate-formaldehyde condensate, especially exerted by interacting with the dye, is the largest of all the samples used. This may be due to the polymeric feature of the condensate.