Sensitized Photo‐oxidation of Wool and Silk by a Triazinylstilbene

Leaver, Ian H.; Ramsay, G. Caird

doi:10.1111/j.1751-1097.1969.tb07322.x

Cited by 40 publications

(25 citation statements)

References 18 publications

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“…Aqueous solutions of several commercial FWAs from the three main classes (stilbenes, pyrazolines and coumarins) produced both the superoxide anion and hydrogen peroxide (H 2 O 2 ), rather than singlet oxygen, on exposure to UVA radiation [2]. In the absence of oxygen it has also been shown that neither bleached wool [3] nor FWA‐treated wool [4] undergoes rapid photoyellowing. We therefore believe that it is the subsequent attack of these ROS upon certain amino acid residues in wool, attack of ROS on the FWA itself, or a combination of both of these processes that leads to the formation of yellow chromophores in irradiated FWA‐treated wool [2].…”

Section: Introductionmentioning

confidence: 99%

Improving the photostability of whitened wool by applying an anti‐oxidant and metal chelator rinse

Millington

2006

Coloration Technology

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The combination of a water‐soluble anti‐oxidant with a metal‐chelating agent improved the wet and dry photostability of wool treated with a fluorescent whitening agent (FWA) significantly when used as a rinse treatment after FWA application. The most effective anti‐oxidants identified were l‐ascorbic acid and N‐acetyl cysteine. Oxalic acid was the most effective metal chelator, capable of limiting visible yellowing under both wet and dry conditions, and its use as a rinse treatment on FWA‐treated wool also improved its initial whiteness. Although rinse treatments containing l‐ascorbic acid provided a high level of photoprotection when wool samples were examined immediately after exposure to light, it was unsatisfactory due to the slow reaction of its oxidation product dehydroascorbic acid with free amino groups in wool to produce pink chromophores after standing for a few days. These pink chromophores slowly turned yellow over several weeks.

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Section: Introductionmentioning

confidence: 99%

Improving the photostability of whitened wool by applying an anti‐oxidant and metal chelator rinse

Millington

2006

Coloration Technology

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“…The TFBs were considered to accelerate the photo-oxidation of the wool and silk by impacting on the photodecomposition of the histidyl and tryptophyl residues of the substances [12,13]. Conversely, the light stability of TFBs was also influenced by the protein substance [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…The light-fastness of TFBs on protein fabrics has been investigated widely and intensively [10][11][12][13][14][15]. The TFBs were considered to accelerate the photo-oxidation of the wool and silk by impacting on the photodecomposition of the histidyl and tryptophyl residues of the substances [12,13].…”

Section: Introductionmentioning

confidence: 99%

Environmental impact on the light and perspiration stability of triazinylstilbene fluorescent brighteners on cotton fabrics

Chen

Zhao

et al. 2014

Fibers Polym

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The fading of the triazinylstilbene fluorescent brighteners (TFBs) on cotton fabric under the conditions of exposure to sunlight and human sweat may reduce the visual quality and added value of the garment and also produce many toxic substances, which could threaten human health due to direct contact with skin. In order to investigate the light-fastness and perspiration stability of TFBs on cotton fabrics, three environmental factors of affecting the photo-fading of TFBs, i.e., ultraviolet irradiation, wet condition, and atmospheric constituents, were discussed according to AATCC standard. The results indicated that the effect of ultraviolet irradiation was more significant than its visible counterpart on the light and perspiration stability of TFBs on cotton fabrics. The light stability of TFBs was susceptible to the wet environment, and the presence of moisture accelerated the rate of photo-fading of TFBs. Furthermore, the study on the contribution of atmospheric constituents disclosed that the oxygen in the air together with the moisture of perspiration would make the synergistic effect on the fading of TFBs.

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“…Photosensitized degradation of wool keratin by fluorescent brightcners has been studied by a number of workers [2][3][4][5][6]8]. Changes observed in the wool and brightener have been expressed in terms of fluoresccnce decay of the brightener, discoloration of the wool, rendering of tensile properties, and changes in the amino acid composition of the treated wool.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Wool on the Photolysis of a Model Stilbene Fluorescent Brightener

Seiber

Needles

1972

Textile Research Journal

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The effect of suspended wool on the photodecomposition of a model fluorescent brightener, disodium 4,4'-diacetamidostilbene-2,2-disulfonate in aqueous solutions has been studied. Low concentrations of suspended wool increase the rate of brightener photodecomposition, whereas higher wool concentrations retard the rate of brightener decomposition. Photo-oxidation of the brightener in solution or on wool substrate gives the same major photocleavage product, sodium 5-acetamido-2-formylbenxenesutfonale.

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Sensitized Photo‐oxidation of Wool and Silk by a Triazinylstilbene

Cited by 40 publications

References 18 publications

Improving the photostability of whitened wool by applying an anti‐oxidant and metal chelator rinse

Improving the photostability of whitened wool by applying an anti‐oxidant and metal chelator rinse

Environmental impact on the light and perspiration stability of triazinylstilbene fluorescent brighteners on cotton fabrics

The Effect of Wool on the Photolysis of a Model Stilbene Fluorescent Brightener

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