Direct coloration of textiles with photochromic dyes. Part 1 : Application of spiroindolinonaphthoxazines as disperse dyes to polyester, nylon and acrylic fabrics / Shah M. Reduwan Billah in COLORATION TECHNOLOGY, Vol. 124, N° 4 (2008)  

[article]  inCOLORATION TECHNOLOGY > Vol. 124, N° 4 (2008) . - p. 223-228 Titre : Direct coloration of textiles with photochromic dyes. Part 1 : Application of spiroindolinonaphthoxazines as disperse dyes to polyester, nylon and acrylic fabrics Type de document : texte imprimé Auteurs : Shah M. Reduwan Billah, Auteur ; Renzo Shamey, Auteur ; Robert M. Christie, Auteur Année de publication : 2009 Article en page(s) : p. 223-228 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : 1,3,3-Trimethylspiroindoline-2,3'-3H-naphth[2,1-b][1,4]oxazine (1a) and 6'-piperidino-1,3,3-trimethylspiroindoline-2,3'-3H-naphth[2,1-b][1,4]oxazine (1b) were applied as disperse dyes to polyester, nylon and acrylic fabrics. Under optimised dyeing conditions, photochromic fabrics were produced which, on irradiation with ultraviolet or exposure to sunlight, turned blue (1a) or blueish-purple (1b). Dye 1a showed enhanced photochromic colour change performance compared with dye 1b. The photochromic colour build was highest on nylon and lowest on acrylic fabric. The colour change properties and the technical performance (wash fastness and photostability) of the photochromic fabrics were evaluated using specifically adapted colour measurement methods. The data were analysed in terms of variation of lightness, a*, b*, chroma, hue angle and D E, colour difference before and after exposure, and K/S curves as a function of irradiation time. The fabrics generally showed good wash fastness. Although the colour build-up decreased with exposure to the Xenotest fadeometer, some residual photochromism remained after prolonged exposure. DOI : 10.1111/j.1478-4408.2008.00145.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2008.00145.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3168 [article]

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Direct coloration of textiles with photochromic dyes / Shah M. Reduwan Billah in COLORATION TECHNOLOGY, Vol. 124, N° 4 (2008)  

[article]  inCOLORATION TECHNOLOGY > Vol. 124, N° 4 (2008) . - p. 229-233 Titre : Direct coloration of textiles with photochromic dyes : Part 2 : The effect of solvents on the colour change of photochromic textiles Type de document : texte imprimé Auteurs : Shah M. Reduwan Billah, Auteur ; Robert M. Christie, Auteur ; Keith M. Morgan, Auteur Année de publication : 2009 Article en page(s) : p. 229-233 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : Polyester, acrylic and nylon textile substrates dyed with two spirooxazine dyes, 1,3,3-trimethyl-spiroindoline-2,3'-3H-naphth[2,1-b][1,4]oxazine (1a) and 6'-piperidino-1,3,3-trimethyl spiroindoline-2,3'-3H-naphth[2,1-b][1,4]oxazine (1b), exhibit significantly higher photochromic colour build-up when wet compared with after drying. A study of this phenomenon, extended beyond water to the influence of a series of selected organic solvents on photochromic behaviour, using colour measurement of the photochromic textiles under controlled ultraviolet irradiation conditions, is reported. The results of molecular modelling calculations (AM1 in water and PM5 in water) have been used as a means of interpreting the observed effects, in conjunction with qualitative arguments based on solvation and fibre swelling. DOI : 10.1111/j.1478-4408.2008.00146.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2008.00146.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3169 [article]

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Direct coloration of textiles with photochromic dyes. Part 3: dyeing of wool with photochromic acid dyes / Shah M. Reduwan Billah in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 488-492 Titre : Direct coloration of textiles with photochromic dyes. Part 3: dyeing of wool with photochromic acid dyes Type de document : texte imprimé Auteurs : Shah M. Reduwan Billah, Auteur ; Robert M. Christie, Auteur ; Renzo Shamey, Auteur Année de publication : 2012 Article en page(s) : p. 488-492 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Laine Photochromisme Pigments à effets spéciaux Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Wool dyed with two isomeric water-soluble spirooxazine-based photochromic acid dyes, which were specifically designed and synthesised for direct application to protein and polyamide substrates, showed reversible change from a pale yellowish colour to blue when exposed to sunlight or UV light. With the first dye, significantly higher photochromic colour change was obtained when the wool was bleached, a feature attributed to a more open fibre structure which may facilitate penetration of the non-planar dye anion and also the photocoloration reaction which requires a change in molecular geometry. Experimentation demonstrated that the optimum conditions for application of this dye to wool was from an aqueous dyebath at neutral pH and a temperature of 60 °C. An investigation using HPLC demonstrated that the dye was susceptible to decomposition in aqueous solution at higher temperatures and at lower pH values. The second dye was also applied to wool fabric to give a fabric with similar photochromic properties. The technical performance of the dyed fabrics, in terms of washfastness and photostability, was assessed. Note de contenu : - EXPERIMENTAL : Materials - Dyeing of wool fabric - Colour measurement - Study of the stability of dye 2 using high-performance liquid chromatography - RESULTS AND DISCUSSION : Dyeing of wool with photochromic acid dyes DOI : 10.1111/j.1478-4408.2012.00406.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00406.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16455 [article]

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Photochromic dyeing / Shah M. Reduwan Billah in LEATHER INTERNATIONAL, Vol. 213, N° 4806 (01-02/2011)  

[article]  inLEATHER INTERNATIONAL > Vol. 213, N° 4806 (01-02/2011) . - p. 34-36 Titre : Photochromic dyeing Type de document : texte imprimé Auteurs : Shah M. Reduwan Billah, Auteur ; Robert M. Christie, Auteur ; Renzo Shamey, Auteur ; Korshed Alam, Auteur ; Keith M. Morgan, Auteur Année de publication : 2011 Article en page(s) : p. 34-36 Langues : Anglais (eng) Catégories : Cuirs et peaux -- Teinture Photochromisme Pigments à effets spéciaux Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Comparative study on the photochromic colour changing performance of leather with protein and polyamide substrates dyed with photochromic acid dyes. En ligne : https://drive.google.com/file/d/1W6N-Fmvfu7Di71qDmURwlQNvWaLmG08o/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11118 [article]

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