Photofading of reactive dyes on silk and cotton: effect of dye—fibre interactions

Rastogi, Deepali; Sen, Kushal; Gulrajani, M L

doi:10.1111/j.1478-4408.2001.tb00060.x

Cited by 18 publications

(14 citation statements)

References 23 publications

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“…It can be seen from Table that the printed samples exhibited moderate to very good (6) light fastness. It is believed that the formation of a covalent bond between the dye molecule and the fibre facilitates the transfer of energy from the excited state of the dye to the fibre, thus reducing the rate of photodegradation of the dye …”

Section: Resultsmentioning

confidence: 99%

Green synthesis of reactive dye for ink‐jet printing

Faisal

Lin

2019

Coloration Technology

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Chloropyrimidine‐based reactive dyes are reported as well suited to textile printing; however, nucleophilic aromatic substitution of chloropyrimidines with amino‐containing chromophores is slow and often suffers from poor yields. In this study, a novel and simple method was developed for the synthesis of chloropyrimidine‐based reactive dye under microwave irradiation. In addition, the dye was also synthesised by conventional heating for comparison, which took both the reaction time and yield into account. The progress of the synthesis reactions concerned were monitored using capillary electrophoresis and the purity of the dye obtained was assessed by thin‐layer chromatography. The structure of the synthesised trichloropyrimidine dye was confirmed by Fourier Transform–infrared spectroscopy and elemental analysis. It was found that the reaction rate of the nucleophilic aromatic substitution carried out under microwave irradiation was 4‐fold faster than that carried out under conventional heating, although the enhancement in product yield was modest. These results suggest that microwave irradiation is an effective technique for the synthesis of chloropyrimidine‐based reactive dyes. The synthesised chloropyrimidine dye was formulated into an ink and applied onto a wool fabric by ink‐jet printing. The printed fabrics were steamed at 102°C for 5‐25 minutes at 5‐minute intervals. Good K/S and rate of dye fixation were obtained, both of which improved with increasing steaming time. The prints obtained exhibited reasonably good light and wash fastness properties.

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Section: Resultsmentioning

confidence: 99%

Green synthesis of reactive dye for ink‐jet printing

Faisal

Lin

2019

Coloration Technology

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“…The marked pH effect on the photostability of CT and VS reactive dyes could be explained by the hydrolytic stability of the covalent bond between the dyes and fibre in perspiration with different pH values. The study of the effect of dye–fibre interactions has already illustrated that dyes covalently‐bonded with cotton fibre exhibit much better photostability than those in a hydrolysed form [5]. As CT reactive dyes are more easily hydrolysed in acidic solution than in alkaline media, while the opposite result could be obtained in the case of VS reactive dyes [17], larger colour change, therefore, occurred on CT reactive dyes when perspiration pH = 3.5 and VS reactive dyes when perspiration pH = 8.0.…”

Section: Resultsmentioning

confidence: 99%

“…characteristics of dyes, atmospheric composition, substrate effect, irradiation wavelength, dye-fibre interactions, the presence of additives, etc. [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Fading of reactive dyes on cellulose under light and perspiration

Zhuang

Zhang

Pan

et al. 2007

Coloration Technology

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The fading of nine reactive dyes on cotton fabrics under light and perspiration was investigated using the ATTS standard and many factors affecting the stability of these dyes were discussed, viz. exposure environment, chromophores of dyes, the pH value and components of the artificial perspiration. The experimental results show that reactive dyes exhibit lowest stability under simultaneous exposure to light, perspiration and oxygen in a wet state. Among all selected dyes, Cu‐complex azo reactive dyes appear to be the most sensitive, whereas anthraquinone reactive dyes show the best stability. The pH value of perspiration may also greatly influence the fading of dyes by affecting the hydrolytic stability of dye–fibre bonding. Furthermore, the study on the contribution of artificial perspiration components discloses that some acidic components play major roles in the fading of the dyes and inorganic salts usually decelerate the fading extent.

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“…It has been demonstrated that the chromophores chemically bonded on polymer chains have advanced migration fastness and light fastness, [12,13] and this technique has been introduced into colored latex preparation. It was found that the covalent incorporation of chromophores with polymer is a good approach for the colora-tion of polymer latex.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Covalently‐colored Polymer Latex via Batch Emulsion Polymerization

Shen

et al. 2012

Chin. J. Chem.

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Covalently-colored polymer latex was synthesized via batch emulsion copolymerization of styrene, butyl acrylate and methacrylic acid in the presence of red polymerizable dye monomer consisting of anthraquinone chromophore, alkyl spacer and acryloyl group, and the influences of the initiator, surfactant and polymerizable dye on the polymerization and the latex properties were investigated. Results showed that the initiator amount was a determinative factor for the monomer conversion, and a high conversion of the polymerizable dye could be achieved when the ammonium persulfate amount was equal to or more than 1 wt% to the total monomers. Most of the chromophores were covalently bonded to the polymer chains if the polymerizable dye was used in the range of 0-1.5 wt%. The light fastness of the resulting latex film was much better than that of the noncovalently-colored polymer film.

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Photofading of reactive dyes on silk and cotton: effect of dye—fibre interactions

Cited by 18 publications

References 23 publications

Green synthesis of reactive dye for ink‐jet printing

Green synthesis of reactive dye for ink‐jet printing

Fading of reactive dyes on cellulose under light and perspiration

Preparation of Covalently‐colored Polymer Latex via Batch Emulsion Polymerization

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