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Changing colours : now you see them, now you don’t / Timothy L. Dawson in COLORATION TECHNOLOGY, Vol. 126, N° 4 (2010)  

[article]  inCOLORATION TECHNOLOGY > Vol. 126, N° 4 (2010) . - p. 177-188 Titre : Changing colours : now you see them, now you don’t Type de document : texte imprimé Auteurs : Timothy L. Dawson, Auteur Année de publication : 2010 Article en page(s) : p. 177-188 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : Nature offers a range of colour displays which are relatively short-lived and which were for many centuries little understood. Today we can explain most which arise from diffraction and reflection effects on rays of sunlight, various atmospheric ionisation phenomena and many colour effects resulting from biochemical reactions, although less is understood about some of the strange psychedelic patterns and colours which our brains can sometimes produce. The practical purposes to which certain fluorescent, thermochromic and photochromic dyes can be put, including their presently limited textile applications, are illustrated. Note de contenu : TRANSIENT COLOUR EFFECTS IN NATURE : Rainbows - Related light refraction effects - ionic discharge effects - Biological light effects - Bioluminescence - Transient effect in human colour vision. SYNTHETIC TRANSIENT COLOURS AND THEIR APPLICATION : Chemiluminescence - Short-term photoluminescence - Transient colours in chemical demonstration experiments. TRANSIENT LUMINESCENCE : Pyroluminescence - Mechanoluminescence. HEAT AND LIGHT-INDUCED COLOUR CHANGE : Thermochromism - Photochromism - Photo and thermochromic dyes for digital recording media. OTHER CHROMIC EFFECTS : Electrochromism and electroluminescence - Ionochromism - Solvatochromism. CONCLUSION AND FUTURE DEVELOPMENTS DOI : 10.1111/j.1478-4408.2010.00247.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00247.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9869 [article]

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Polymer- and wax-based monoconcentrate predispersed pigments in the colouring of plastics / Suresh P. Deshmukh in COLORATION TECHNOLOGY, Vol. 126, N° 4 (2010)  

[article]  inCOLORATION TECHNOLOGY > Vol. 126, N° 4 (2010) Titre : Polymer- and wax-based monoconcentrate predispersed pigments in the colouring of plastics Type de document : texte imprimé Auteurs : Suresh P. Deshmukh, Auteur ; Mahindra B. Parmar, Auteur ; Ashok C. Rao, Auteur ; Varinder Wadhwa, Auteur Année de publication : 2010 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : Over the past few decades, masterbatch production has been increasing year by year. Pigments are used primarily in masterbatches because of their ability to impart colour or opacity to a matrix. The effectiveness of pigments depends not only on their intrinsic ability to absorb or scatter light, but also, importantly, on the dispersiblity and distribution of the pigments that can be achieved in plastics. Nowadays, stringent environmental as well as excellent quality controls are making inevitable the use of non-dusty monoconcentrated predispersed pigments for the production of masterbatches for the colouring of plastics. Commercially, for the most part, two types of monoconcentrated predispersed pigments are being used for the colouring of thermoplastic masterbatches. These are polymer- and wax-based predispersed pigments. This study has been undertaken to provide a comparison of the colouring properties of polymer- and wax-based monoconcentrated predispersed pigments. Four commercially used organic pigments have been selected. Both types of monoconcentrate predispersed pigments have been developed on a co-rotating twin-screw compounding extruder with a length/diameter ratio of 44. A detailed analysis on the comparison of the colouring properties is presented. Results indicate that good colour properties are achieved when operating conditions are optimised. Note de contenu : Predispersed pigments for manufacturing masterbatches. EXPERIMENTAL : Materials - Pigments formulations - Processing of monoconcentrate predispersed pigments - Sample preparation and analysis - Polypropylene formulations for testing. RESULTS AND DISCUSSION : Filter pressure value analysis. DOI : 10.1111/j.1478-4408.2010.00245.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00245.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9870 [article]

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Dyeing and finishing of lyocell union fabrics : an industrial study / H. D. Joshi in COLORATION TECHNOLOGY, Vol. 126, N° 4 (2010)  

[article]  inCOLORATION TECHNOLOGY > Vol. 126, N° 4 (2010) . - p.194-200 Titre : Dyeing and finishing of lyocell union fabrics : an industrial study Type de document : texte imprimé Auteurs : H. D. Joshi, Auteur ; M. G. Patel, Auteur Année de publication : 2010 Article en page(s) : p.194-200 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : Lyocell union fabrics, namely lyocell/silk and lyocell/polyester fabrics, were woven in different fabric constructions and dyed with reactive dyes, acid dyes and a disperse dye. The resulting dyed fabrics were given a resin finishing treatment and their wash fastness was measured. With appropriate dye selection and control of dyeing conditions, some bright solid shades and effective cross-dyed shades were obtained. The dyed and finished fabrics had a smooth, lustrous handle, ideal for lightweight garments. Note de contenu : EXPERIMENTAL : Materials - Weaving - Pretreatment (degumming) - Scouring and bleaching - Enzyme treatment - Dyeing - Resin finishing - Decatising - Measurement of reflectance of dyed samples - Measurement of colour fastness to washing. RESULTS AND DISCUSSION : Effect of crossstaining for cross-dyed shades - Solid shades - Lyocell/polyester cross-dyed. DOI : 10.1111/j.1478-4408.2010.00248.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00248.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9871 [article]

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Use of B-cyclodextrin in the dyeing of polyester with low environmental impact / Rosarina Carpignano in COLORATION TECHNOLOGY, Vol. 126, N° 4 (2010)  

[article]  inCOLORATION TECHNOLOGY > Vol. 126, N° 4 (2010) . - p. 201-208 Titre : Use of B-cyclodextrin in the dyeing of polyester with low environmental impact Type de document : texte imprimé Auteurs : Rosarina Carpignano, Auteur ; Stefania Parlati, Auteur ; Paola Piccinini, Auteur ; Piero Savarino, Auteur ; Maria Rita de Giorgi, Auteur ; Rita Fochi, Auteur Année de publication : 2010 Article en page(s) : p. 201-208 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this paper, the effect of ?-cyclodextrin as an additive in the dyeing of polyester with disperse dyes, as a substitute for a commercial surfactant commonly used, was explored with the aim of reducing the environmental impact of the exhausted baths. Using a chemometric approach, a small group of dyes was selected as a ‘training set’ to be representative of a larger series of dyes with a similar structure. The selected dyes were synthesised and applied to the dyeing of polyester fibres under various conditions. The technological properties of the dyed samples were measured. The results showed that ?-cyclodextrin can satisfactorarily be used as an additive in dyebaths for polyester without the addition of other auxiliaries, with a positive environmental impact. Solubility isotherms evidenced dye–?-cyclodextrin interactions. The formation of inclusion complexes did not produce negative effects on the dyeing performance. Light fastness values were modelled as a function of the structure by the chemometric partial least squares method and the established model was used to predict the fastness of dyes of analogous structure, not yet explored. Note de contenu : EXPERIMENTAL : Selection of the training set of dyes - Structure description and principal component analysis - Factorial design - Synthesis of dyes and solubility isotherms - Dyeing of PET fabric and evaluation of technological properties - Bath exhaustion - Partial least squares analysis. DOI : 10.1111/j.1478-4408.2010.00246.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00246.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9872 [article]

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Synthesis of novel 3-hetaryl-substituted 6- and 8-hydroxybenzo[f]coumarin derivatives / Todor Deligeorgiev in COLORATION TECHNOLOGY, Vol. 126, N° 4 (2010)  

[article]  inCOLORATION TECHNOLOGY > Vol. 126, N° 4 (2010) . - p. 209-214 Titre : Synthesis of novel 3-hetaryl-substituted 6- and 8-hydroxybenzo[f]coumarin derivatives Type de document : texte imprimé Auteurs : Todor Deligeorgiev, Auteur ; Teodora Tsvetkova, Auteur ; Stefka Kaloyanova, Auteur ; Diana Ivanova, Auteur ; Iliana Timtcheva, Auteur Année de publication : 2010 Article en page(s) : p. 209-214 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : Eight novel 3-hetaryl-substituted 6- and 8-hydroxybenzo[f]iminocoumarin compounds were synthesised by the reaction of 2,5-dihydroxynaphthaldehydes or 2,7-dihydroxynaphthaldehydes with 2-cyanomethylbenzo-thiazole, 2-cyanomethylbenzoimidazole, 1-methyl-2-cyanomethylbenzoimidazole and 2-cyanomethyl-4-phenylthiazole. The iminocompounds obtained were hydrolysed with hydrochloric acid to the benzo[f]coumarins. Becaue of the high reactivity of the iminocoumarins, only mixtures which also contained the corresponding coumarin compounds were isolated. The absorption and steady-state fluorescence characteristics of the benzo[f]coumarins (benzo[f]chromen-2-ones) synthesised were studied in ethanol and in toluene. Note de contenu : EXPERIMENTAL : Synthesis of 3-hetarylbenzo[f]iminocoumarin compounds - Synthesis of 3-hetarylbenzo[f]coumarin. RESULTS AND DISCUSSION : Synthetic procedure of 3-hetaryl-6- and 8-hydroxybenzo[f]coumarins - Absorption and fluorescent properties of 3-hetaryl-6- and _-hydroxybenzo[f]coumarins. DOI : 10.1111/j.1478-4408.2010.00249.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00249.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9873 [article]

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Relationship between photofading and chemical structure of disperse azo dyes on nylon fabric / Yasuyo Okada in COLORATION TECHNOLOGY, Vol. 126, N° 4 (2010)  

[article]  inCOLORATION TECHNOLOGY > Vol. 126, N° 4 (2010) . - p. 215-230 Titre : Relationship between photofading and chemical structure of disperse azo dyes on nylon fabric Type de document : texte imprimé Auteurs : Yasuyo Okada, Auteur ; Toshio Hihara, Auteur ; Mie Hirose, Auteur ; Zenzo Morita, Auteur Année de publication : 2010 Article en page(s) : p. 215-230 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : The initial rates of photofading for 30 disperse azo dyes on nylon fabric upon exposure to a carbon arc in air have been analysed by formulating a kinetic equation that describes azo scission via the disproportionation reactions and intramolecular H-transfer by two kinds of hydrazinyl radicals and the conversion of a nitro group to a nitroso group via the disproportionation reaction of nitrosyl hydroxide radicals. The five reaction rate constants are discussed in terms of the heats of reaction by calculating the heats of formation for the reactants, intermediates and products of each reaction using the PM5 method. Phenylazo- and thiazoleazo-N,N-substituted anilines and phenylazo-pyridones exhibited large rate constants of multiple terms, while phenylazo-phenols had the highest light fastness and very small rate constants for the disproportionation reactions of hydrazinyl radicals. Photofading on nylon fabric was primarily controlled by the thermal reactions of photo-induced monohydrogenated dye radicals, which occurred via one or two primary multiple routes. Note de contenu : EXPERIMENTAL : Dyes used - Method of dyeing, exposure and molecular orbital calculation. RESULTS AND DISCUSSION : Photofading behaviours on PA fabric - Azo scission by reaction of hydrazinyl radicals with MHN radicals - Multiple reaction routes exhibiting fading ratios and Kpa values - Thermochemical analysis of PAPs - General conclusions regarding thermochemical analysis of azo dyes - Relationship between chemical structure and reductive fading. DOI : 10.1111/j.1478-4408.2010.00250.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00250.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9874 [article]

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Modification of polyester fabric by chemical/thermal treatment to improve dyeing ability / Wafaa M. Raslan in COLORATION TECHNOLOGY, Vol. 126, N° 4 (2010)  

[article]  inCOLORATION TECHNOLOGY > Vol. 126, N° 4 (2010) . - p. 231-236 Titre : Modification of polyester fabric by chemical/thermal treatment to improve dyeing ability Type de document : texte imprimé Auteurs : Wafaa M. Raslan, Auteur ; Ahmed Bendak, Auteur ; Eid M. Khalil, Auteur ; Thanaa Fawzi, Auteur Année de publication : 2010 Article en page(s) : p. 231-236 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : Attempts were made to enhance the dyeability of polyester fabric by thermal treatment or combined chemical/thermal treatment in hot air or in steam, either slack or under load. Ethanolamine, hydrazine hydrate, ethylene glycol and a benzophenone derivative were applied to the fabric by padding technique prior to the thermal treatment. The dyeability of polyester fabric was found to be improved at nearly boiling without using carriers and/or high-temperature/high-pressure techniques. The rate of dyeing of chemically/thermally treated polyester fabric was found to increase. Differential thermal analysis of the polyester samples was interpreted in terms of dyeability improvement. The glass transition temperature of the treated fabric was found to decrease compared with the untreated one, resulting in an enhancement in the dyeability of polyester fabric with disperse dye. Note de contenu : EXPERIMENTAL : Materials - Treatments - Dyeing procedure - Colour measurement - Swellability - Differential thermal analysis. RESULTS AND DISCUSSION : Temperature, time and media of treatment - Chemical/thermal treatment (Hydrazine hydrate - Ethanolamine - Ethylene glycol - Benzophenone derivative) - Kinetic investigation - Surface roughness - Differential thermal analysis - Cross-section microscopy. DOI : 10.1111/j.1478-4408.2010.00251.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00251.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9875 [article]

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Synthesis and spectroscopic properties of novel phthalimide-derived monoazo disperse dyes containing ester groups / Jae-Hong Choi in COLORATION TECHNOLOGY, Vol. 126, N° 4 (2010)  

[article]  inCOLORATION TECHNOLOGY > Vol. 126, N° 4 (2010) . - p. 237-242 Titre : Synthesis and spectroscopic properties of novel phthalimide-derived monoazo disperse dyes containing ester groups Type de document : texte imprimé Auteurs : Jae-Hong Choi, Auteur ; Oh-tak Kwon, Auteur ; Hyun-young Lee, Auteur ; Andrew D. Towns, Auteur ; Chun Yoon, Auteur Année de publication : 2010 Article en page(s) : p. 237-242 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : The synthesis and spectroscopic properties of monoazo dye series, whose members consist of N-alkylphthalimide diazo components combined with a coupling component containing two ester groups, are reported. Such colourants are potentially alkali-clearable as a consequence not only of the presence of diester functionality on the coupler, but also through use of the base-sensitive phthalimide system. Shortening the N-alkyl group by removing one or two methylene units from a butyl chain made little difference to absorption properties, as would be expected given the relatively minor differences in inductive character produced. Shifts in the absorption maximum of the dyes associated with dibromination of the phthalimidylazo motif and its subsequent cyanodehalogenation were in agreement with theory and literature data for related series. Diester substitution on the coupling component brought about hypsochromism and hypochromism. Note de contenu : EXPERIMENTALS : Materials - Analyisis and spectroscopy - Preparation of intermediates and dyes - Synthesis of phthalimide intermediates - Synthesis of diester coupling component - Synthesis of dyes. RESULTS AND DISCUSSION : Synthesis of dye intermediates and dyes - Spectroscopic properties. DOI : 10.1111/j.1478-4408.2010.00252.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00252.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9876 [article]

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Studies on the ultrasonic-assisted dyeing of poly(trimethylene terephthalate) fabric / L. Wang in COLORATION TECHNOLOGY, Vol. 126, N° 4 (2010)  

[article]  inCOLORATION TECHNOLOGY > Vol. 126, N° 4 (2010) . - p. 243-248 Titre : Studies on the ultrasonic-assisted dyeing of poly(trimethylene terephthalate) fabric Type de document : texte imprimé Auteurs : L. Wang, Auteur ; H. F. Zhao, Auteur ; J. X. Lin, Auteur Année de publication : 2010 Article en page(s) : p. 243-248 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : Poly(trimethylene terephthalate) fabric was dyed with Disperse Red FB by using ultrasonic power. The effects of ultrasound on the K/S values of the fabric, the fibre structure and the disperse dye were investigated. The results show that the ultrasonic power increases the K/S values of the fabric, disintegrates the large particles of oligomer on the surface of poly(trimethylene terephthalate) fibre into smaller ones and reduces the particle size of the dye in solution. The K/S value of poly(trimethylene terephthalate) fabric dyed using ultrasound is much higher than that without ultrasound, especially when the temperature is over 60 °C. In addition, the adsorption isotherm study shows that the adsorption isotherm can be well fitted by the Langmuir model. Note de contenu : METHODS : Dyeing of PTT fabric - Measurement of K/S value of dyed fabric - Observation of surface morphology of PTT fibre - Analysis for crystal morphology of PTT fibre - Analysis for crystal morphology of PTT fibre - Measurement of particle sizes of disperse dye - Adsorption isotherm study. RESULTS AND DISCUSSION : Effect of ultrasound on PTT fibres structure and on disperse dye - Dyeing process analysis (dyeing time - Swelling agent) - Adsorption isotherm. DOI : 10.1111/j.1478-4408.2010.00253.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00253.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9877 [article]

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