| AN EXAMINATION OF THE INFLUENCE OF STABILIZERS ON THE PHOTOCHEMICAL STABILITY OF DISPERSE DYES |
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| 作者姓名： | 戴瑾瑾 John Griffiths |
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| 作者单位： | Dept. of Textile Chemical Engineering CTU，Dept. of Colour Chemistry Uuiversity of Leeds U.K. |
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| 摘 要： | There is a powerful market-need for superfast disperse dyes in special use, e.g. for automotivefabrics. The photochemical fading reactions of dyes are often very complicated, and no singlphotodegradation pathway can be involved for all kinds of dyes. To enhance the photostability of the commonly used disperse dyes, a series of tests on the ef-fect of variable stabilizers on the photodegradation rate of nine representative disperse dyes werecarried out both in ethyl acetate solution and on cellulose acetate film. A moderate light sourceemitting above 300 nm was adopted in this study to simulate the photofading under practical appli-cations. The results show that, in solution, 2,2,6,6-tetramethyl-piperidine is the most effectivegeneral stabilizer for all the tested dyes, but on cellulose film, nickel diethyl-dithiocarbamateshows the greatest general protecting effect, and a synergistic effect is observed for special combina-tions of stabilizers.
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AN EXAMINATION OF THE INFLUENCE OF STABILIZERS ON THE PHOTOCHEMICAL STABILITY OF DISPERSE DYES |
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| Dai jinjin,Dept of Textile Chemical Engineering,CTU
John Griffiths,Dept. of Colour Chemistry,University of Leeds,U.K..AN EXAMINATION OF THE INFLUENCE OF STABILIZERS ON THE PHOTOCHEMICAL STABILITY OF DISPERSE DYES[J].Journal of Donghua University,1991(2). |
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| Authors: | Dai jinjin Dept of Textile Chemical Engineering CTU
John Griffiths Dept of Colour Chemistry University of Leeds UK |
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| Abstract: | There is a powerful market-need for superfast disperse dyes in special use, e.g. for automotive fabrics. The photochemical fading reactions of dyes are often very complicated, and no singl photodegradation pathway can be involved for all kinds of dyes. To enhance the photostability of the commonly used disperse dyes, a series of tests on the ef- fect of variable stabilizers on the photodegradation rate of nine representative disperse dyes were carried out both in ethyl acetate solution and on cellulose acetate film. A moderate light source emitting above 300 nm was adopted in this study to simulate the photofading under practical appli- cations. The results show that, in solution, 2,2,6,6-tetramethyl-piperidine is the most effective general stabilizer for all the tested dyes, but on cellulose film, nickel diethyl-dithiocarbamate shows the greatest general protecting effect, and a synergistic effect is observed for special combina- tions of stabilizers. |
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| Keywords: | dyes stabilizers disperse dyes photodegradation photostabilization |
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