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Non-thermal plasma degradation of dye using an underwater dielectric barrier discharge created inside a porous hydrophobic ceramic tube / Jin-Oh Jo in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 73-80 Titre : Non-thermal plasma degradation of dye using an underwater dielectric barrier discharge created inside a porous hydrophobic ceramic tube Type de document : texte imprimé Auteurs : Jin-Oh Jo, Auteur ; Soo Hyoung Moon, Auteur ; Young Sun Mok, Auteur Année de publication : 2015 Article en page(s) : p. 73-80 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Détérioration Colorants azoïques Eaux usées -- Epuration Interfaces gaz-liquide Solutions aqueuses (chimie) Technique des plasmas Index. décimale : 667.3 Teinture et impression des tissus Résumé : An alternating-current-driven, atmospheric-pressure, non-thermal plasma reactor was applied to the degradation of dye in water. The plasma reactor, made of a porous hollow ceramic tube, was placed underwater and was able to disperse plasmatic gas containing various reactive species into aqueous dye solution as small bubbles through the micropores of the tube. The hydrophobic coating on the surface of the ceramic tube effectively prevented the water from permeating through it. This wastewater treatment system was able immediately to transfer plasmatic gas to aqueous solution across the porous ceramic tube and provide a large gas–liquid interfacial area, allowing efficient dye treatment. So as to simulate real dyeing wastewater, an aqueous solution comprising two different azo dyes was used. The effect of discharge power, treatment time, and flow rate of oxygen used for the creation of plasma was examined. The results suggest that this system may be useful for the treatment of organic wastewater. Note de contenu : - Ultraviolet-visible spectra - Degradation efficiency - Chemical oxygen demand - Byproduct formation DOI : 10.1111/cote.12134 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12134 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23654 [article]

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New insights into dye chemistry and physics / Stephen N. Batchelor in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 81-93 Titre : New insights into dye chemistry and physics Type de document : texte imprimé Auteurs : Stephen N. Batchelor, Auteur Année de publication : 2015 Article en page(s) : p. 81-93 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Détérioration Colorants -- Oxydation Colorants azoïques Fibres cellulosiques Hydrolyse Photodétérioration Solutions aqueuses (chimie) Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : A review of the academic dye research performed by the Port Sunlight group and its coworkers over the past 15 years is presented. The work is focused on three areas: (1) substrate structure; (2) dye interactions in aqueous solution and on substrates; (3) dye degradation and products. For substrates, a detailed model of the nanoenvironment experienced by chemicals within cellulose fibre is given, showing the different environments and remarkable mobility of absorbed chemicals. Advanced nuclear magnetic resonance diffusion measurements provide the complex pathways by which compounds find their way in and out of the fibre. For dye interaction, detailed theoretical and experimental studies are reported on three model dye systems, the anionic monoazo dye Orange II, the bisazo anionic dye CI Direct Blue 1, and cationic monoazo thiazolium dyes, providing a comprehensive picture of their structure. A quantitative mechanism of dye binding to cellulose is shown. Resonance Raman provides an effective forensic tool for dye identification, even from single fibres. The products and kinetics of Orange II dye degradation by one-electron reduction in aqueous solution is given, with the identification of an indophenol dye end-product. In cellulosic materials the reduction mechanism is similar to solution, when the higher microviscosity is accounted for. Hydrolysis of thiazolium dyes occurs at both aromatic rings of the dye but on different timescales. Measurement and calculations of the electronic structures of one-electron-reduced and -oxidised dyes are presented. The mechanism of photooxidation by sunlight of azo dyes in cotton is delineated. Note de contenu : - NEW INSIGHTS INTO SUBSTRATE STRUCTURE : - NEW INSIGHTS INTO DYE INTERACTIONS IN AQUEOUS SOLUTION AND ON SUBSTRATES : CI Direct Blue 1 - Cationic monoazo dyes - Forensic identification of dyes - Dye substantivity to cotton - NEW INSIGHTS INTO DYE DEGRADATION AND PRODUCTS : One-electron reduction and oxidation of anthraquinone, triphenylmethane, and thiazine chromophores - Oxidation and reduction of Orange II - The mechanism of photofading - Hydrolysis of thiazolium dyes DOI : 10.1111/cote.12138 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12138 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23655 [article]

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Bright fluorescent dsDNA probes : novel polycationic asymmetric monomethine cyanine dyes based on thiazolopyridine-quinolinium chromophore / Aleksey Vasilev in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 94-103 Titre : Bright fluorescent dsDNA probes : novel polycationic asymmetric monomethine cyanine dyes based on thiazolopyridine-quinolinium chromophore Type de document : texte imprimé Auteurs : Aleksey Vasilev, Auteur ; Nedyalko Lesev, Auteur ; Sonya Dimitrova, Auteur ; Marina Nedelcheva-Veleva, Auteur ; Stoyno Stoynov, Auteur ; Silvia Angelova, Auteur Année de publication : 2015 Article en page(s) : p. 94-103 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : ADN Analyse spectrale Colorants Colorants -- Synthèse Diagnostic biologique Electrophorèse Fluorescence Index. décimale : 667.3 Teinture et impression des tissus Résumé : Seven tri- and tetracationic monomeric and homodimeric monomethine cyanine dyes based on thiazolo[4,5-b]pyridinium and quinolinium end groups were synthesised and characterised. The dyes were tested as fluorescent DNA intercalating probes to apply in DNA gel electrophoresis. The DNA samples stained with all dyes from the series demonstrated bright fluorescent signals. DNA fragments were successfully visualised under orange and green filters as well as under standard UV transillumination. Two of the studied dyes revealed higher sensitivity to DNA when compared with the commercial dimeric cyanine dye TOTO-1. Their sensitivity reached that of the commercial dimeric cyanine dye YOYO-1, but the emission was shifted to longer wavelengths. These qualities make the dyes suitable to apply in a wide range of medical and scientific analytical methods. Note de contenu : - EXPERIMENTAL : Materials - Equipment - Synthesis of dye 3 - Synthesis of tri- and tetracationic dyes 5a to 5g - Preparation of dyes and DNA solutions - Staining after electrophoresis - Staining prior to electrophoresis - RESULTS AND DISCUSSION : Synthesis and structural characterisation of dyes 5a to 5g - Spectroscopic characteristics of the dyes and computational study of the chromophore before binding to dsDNA - Spectroscopic characteristics after binding to dsDNA - Staining after electrophoresis completion - Staining DNA samples prior to electrophoresis - Retardation of the mobility of stained DNA fragments DOI : 10.1111/cote.12133 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12133 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23656 [article]

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Synthesis, characterisation, and study of the photophysical properties of highly stable imidazole-based novel solid-state fluorescent azo colourants / Preetam N. Moolya in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 104-109 Titre : Synthesis, characterisation, and study of the photophysical properties of highly stable imidazole-based novel solid-state fluorescent azo colourants Type de document : texte imprimé Auteurs : Preetam N. Moolya, Auteur ; Balu L. Gadilohar, Auteur ; Ganapati S. Shankarling, Auteur Année de publication : 2015 Article en page(s) : p. 104-109 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale Caractérisation Colorants -- Propriétés thermiques Colorants -- Solubilité Colorants -- Synthèse Colorants azoïques Fluorescence Index. décimale : 667.3 Teinture et impression des tissus Résumé : Novel solid-state fluorescent azo colourants derived from 5-amino-2-(4-dimethylaminophenyl) benzimidazole as electron donor were synthesised. The colourants were characterised by means of elemental analysis, 1H NMR, and mass spectrometry. These colourants showed molar extinction coefficients in the range 12 000–48 000 dm3 mol?1 cm?1. These compounds exhibited solid-state fluorescence under short UV (254 nm). Electron coupling originating from broad ?-electron delocalisation and keto–enol form is responsible for the large Stokes shift as indicated by absorption and fluorescence spectra. These colourants were soluble in polar aprotic high-boiling solvents such as N,N-dimethylformamide, N,N-dimethylacetamide, and dimethyl sulphoxide, whereas they were insoluble in other common organic solvents. Thermogravimetric analysis of solid-state fluorescent colourants showed that two of the colourants showed thermal stability in the range 230–240 °C, whereas for the rest of the colourants it was found to be lower, and hence the two colourants could find application in the coloration of polymers. Note de contenu : - EXPERIMENTAL : Materials and equipment - Chemical synthesis - RESULTS AND DISCUSSION : Synthesis of solid-state fluorescent azo colourants - Spectroscopic properties of colourants 4a-4e - Thermal properties of the colourants - Solid-state fluorescence DOI : 10.1111/cote.12128 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12128 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23657 [article]

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Sonophotocatalytic treatment of methyl orange dye and real textile effluent using synthesised nano-zinc oxide / Ravindran Hemapriyamvadha in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 110-119 Titre : Sonophotocatalytic treatment of methyl orange dye and real textile effluent using synthesised nano-zinc oxide Type de document : texte imprimé Auteurs : Ravindran Hemapriyamvadha, Auteur ; Thirugnanasambandam Sivasankar, Auteur Année de publication : 2015 Article en page(s) : p. 110-119 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eau -- Épuration -- Élimination des composés organiques Eaux usées -- Epuration Extraction par ultrasons Nanoparticules -- Synthèse Oxyde de zinc Photocatalyse Polluants organiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this work, experiments were carried out by combining the sonication technique with the photocatalytic technique (ultraviolet light source) for the degradation of methyl orange dye and real textile effluent. Studies were performed with variation in parameters such as oxidant (sodium persulfate), commercially available zinc oxide, methyl orange concentration, and sonochemically synthesised zinc oxide. Fourier transform infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction analysis of synthesised zinc oxide showed that the particle size was in the nano range. Near-complete colour removal by sonophotocatalytic treatment was observed for a concentration of 10 mg l?1 of methyl orange with 1 g l?1 of synthesised zinc oxide and 1500 mg l?1 of sodium persulfate. For 100 mg l?1 of methyl orange, the colour removal was 77% for 1 g l?1 commercially available zinc oxide and 84% for 1 g l?1 synthesised zinc oxide respectively, with 1500 mg l?1 sodium persulfate. Similar experimental conditions were applied for the sonophotocatalytic treatment of real textile effluent with different dilutions (1:100, 1:10, and 1:1) and raw effluent. For real textile effluent, sonophotocatalytic treatment was found to be highly effective both in colour and chemical oxygen demand removal. The chemical oxygen demand removal was 88, 65, 63, and 41% for 1:100, 1:10, and 1:1 dilutions and raw effluent respectively. Note de contenu : - MATERIALS AND METHODOLOGY : Materials - Methodology - RESULTS AND DISCUSSION : Sonochemical treatment of methyl orange by sodium persulfate - Sonophotocatalytic treatment of methyl orange by commercial zinc oxide - Characterisation of the synthesised zinc oxide - Sonophotocatalytic treatment of methyl orange with synthesised zinc oxide DOI : 10.1111/cote.12139 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12139 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23658 [article]

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An efficient method for solid-colour and multicolour region segmentation in real yarn-dyed fabric images / Lin Luo in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 120-130 Titre : An efficient method for solid-colour and multicolour region segmentation in real yarn-dyed fabric images Type de document : texte imprimé Auteurs : Lin Luo, Auteur ; Hui-Liang Shen, Auteur ; Si-Jie Shao, Auteur ; Xin John H., Auteur Année de publication : 2015 Article en page(s) : p. 120-130 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale Colorimétrie Imagerie (technique) Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : This paper presents an efficient approach to solid-colour and multicolour region segmentation in real yarn-dyed fabric images. The approach is based on a novel model describing the spectral response of a multispectral imaging system to yarn-dyed fabrics. The model indicates that solid-colour regions cannot be distinguished from multicolour regions in terms of reflectance, tristimulus, or CIELAB values owing to a geometric term representing the influence of fabric surface condition on measured colours. The geometric term makes it difficult to determine the segmentation thresholds of CIEXYZ and CIELAB colour histograms. However, solid-colour and multicolour regions can be detected in CIExyY space because chromaticity coordinates are impervious to the geometric term. The CIExyY histograms of a solid-colour region accord with one Gaussian distribution, but those of a multicolour region accord with a combination of two Gaussian distributions. The CIEXYZ, CIELAB, and CIExyY colour distributions of both solid-colour and multicolour yarn-dyed fabrics were analysed in detail in simulation and real experiments. Experimental results show that solid-colour yarn-dyed regions can be distinguished from multicolour yarn-dyed fabric regions by the shapes of CIExyY histograms, but cannot be distinguished by the shapes of CIEXYZ or CIELAB histograms. Note de contenu : - EXPERIMENTAL : Spectral response of a multispectral imaging system to a yarn-dyed fabric - Colour in CIEXYZ and CIELAB spaces - The chromaticity coordinates - The method for segmentation of solid-colour and multicolour regions - RESULTS AND DISCUSSION : The multispectral imaging system - Simulation experiment - Experiment on real samples DOI : 10.1111/cote.12131 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12131 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23670 [article]

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Preparation and properties of Fe(II)-ion-sensitive colour-changing fabric / Jungxiong Lin in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 131-135 Titre : Preparation and properties of Fe(II)-ion-sensitive colour-changing fabric Type de document : texte imprimé Auteurs : Jungxiong Lin, Auteur ; Zhixin Tan, Auteur ; Jiawen Zhang, Auteur ; Lan Wang, Auteur Année de publication : 2015 Article en page(s) : p. 131-135 Note générale : Bilbiogr. Langues : Anglais (eng) Catégories : Ions fer Phénanthroline Soie et constituants Teinture -- Fibres textiles Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : Textile fabrics were dyed with complexometric indicators (ionochromic dyes) to develop Fe(II) ionochromic fabric. Three kinds of ionochromic dye were used to dye silk fabric, and they were evaluated for colour changes triggered by Fe(II) solution. The K/S values and photos of the fabrics were then recorded. It was found that 1,10-phenanthroline was the most suitable ionochromic dye in these dyes. Colour change from white to red could be clearly seen when 1,10-phenanthroline-dyed silk fabric was triggered by Fe(II) solution, but it showed no colour change when triggered by Cu(II), Mg(II), or Ca(II) solution. Moreover, 1,10-phenanthroline-dyed nylon, polyester, and cotton fabrics showed no obvious colour changes after triggering by Fe(II) solution. Ion concentration, pH value, and reaction time could affect the colour changes. When triggered by 8 mg l?1 of Fe(II) solution at neutral pH for about 15 min, the ionochromic fabric showed a clear colour change. In addition, three coloured fabrics in green, blue, and yellow were also dyed with 1,10-phenanthroline. It was found that they could also show clear colour changes when triggered by Fe(II) solution. These ionochromic fabrics may find broad application in many fields, such as Fe(II) detection, magic toys, anticounterfeiting materials, and bionic silk flowers. Note de contenu : - EXPERIMENTAL : Materials - Fabric dyeing - Colour change experiment - Colour measurement - RESULTS AND DISCUSSION : Preparation of ionochromic fabric - Colour change of ionochromic fabric - Colour change of coloured ionochromic fabric DOI : 10.1111/cote.12137 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12137 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23671 [article]

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Deep-colour vat dyeing of cotton knit fabric on a modified jet dyeing machine / Hiroshi Wakoh in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 136-141 Titre : Deep-colour vat dyeing of cotton knit fabric on a modified jet dyeing machine Type de document : texte imprimé Auteurs : Hiroshi Wakoh, Auteur ; Mina Furuie, Auteur ; Daisuke Inaba, Auteur ; Nobuto Azuma, Auteur ; Koji Nakane, Auteur ; Nobuo Ogata, Auteur ; Toru Shimizu, Auteur ; Osamu Ishimaru, Auteur Année de publication : 2015 Article en page(s) : p. 136-141 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bains de teinture Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Machines textiles Teinture -- Appareils et matériels Teinture -- Fibres textiles Tricot Index. décimale : 667.3 Teinture et impression des tissus Résumé : To improve the vat dyeing of cotton knit fabric with Indanthren Black RB Coll. (CI Vat Black 9), the basic parameters of dyeing, including the concentrations of chemicals, the dyeing temperature and duration, and the apparent diffusion coefficient of the dye, were obtained by test dyeing with a stoppered Erlenmeyer flask and the cellophane film roll method. A stable vat dyeing process has been developed on a modified jet dyeing machine for the first time without using nitrogen to purge oxygen. Modifications were made to improve the airtightness of the machine and the equipment in the liquor circulating system, with a water inlet and outlet for the gentle oxidation of dyed fabric, and with monitoring by means of a sensor inserted in the liquor circulating system for in situ measurements of the redox potential and the pH of the dyeing liquors. These measurements made it possible to follow to their completion the process of dyeing and the process of gentle oxidation by overflow washing with water and final oxidation. Optimal conditions with regard to the amount of reducing agent, the dyeing temperature (80 °C), and oxidising processes were established with this machine. It was found that, by using the modified machine and process conditions, dyeing proceeded stably and reproducibly (at 80 °C) to yield grade A dyed fabric. Visual inspection confirmed that faultless deep-colour dyeing of the fabric was attained. Production has been proceeding successfully for the past 2 years. Owing to its insolubility, complete removal of the dye from the wastewater has been possible. Note de contenu : - EXPERIMENTAL : Materials - Dyes and chemicals - Film roll method - Determination of the dyeing conditions in the jet dyeing machine - Modification of the conventional jet dyeing machine - RESULTS AND DISCUSSION : Calculation of the approximate diffusion coefficient (Da) - Model dyeing by the film roll method for setting production conditions - Measurements of the redox potential and pH under dyeing conditions in the modified jet machine - Operation of modified jet dyeing machines - Dyeing of the knit fabric on the modified dyeing machine - Inspection of the colours of obtained knit fabrics DOI : 10.1111/cote.12135 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12135 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23672 [article]

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Improvement of the dyeing and fastness properties of a naphthalimide fluorescent dye using poly(amidoamine) dendrimer / Mousa Sadeghi-Kiakhani in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 142-148 Titre : Improvement of the dyeing and fastness properties of a naphthalimide fluorescent dye using poly(amidoamine) dendrimer Type de document : texte imprimé Auteurs : Mousa Sadeghi-Kiakhani, Auteur ; Siyamak Safapour, Auteur Année de publication : 2015 Article en page(s) : p. 142-148 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale Colorants -- Propriétés tinctoriales Colorants -- Synthèse Dendrimères Un dendrimère 1,2est une molécule dont la forme reprend celle des branches d'un arbre. Le nom vient du grec "δενδρον"/dendron, signifiant "arbre". En 1979, le premier dendrimère a été synthétisé par D.A. Tomalia3 et d'autres chercheurs de la Dow Chemical Company, et des dendrimères ont depuis été étudiés partout dans le monde pour leur forme unique. Dans la synthèse des dendrimères, les monomères mènent à un polymère monodisperse, tel un arbre4. Il y a deux méthodes définies de synthèse des dendrimères: synthèse divergente5,6 et synthèse convergente7. La première assemble la molécule du noyau jusqu'à la périphérie et le second de l'extérieur vers le noyau. Les propriétés des dendrimères sont engendrées par les structures moléculaires présentes sur sa surface. Par exemple, un dendrimère peut être hydrosoluble quand son extrémité-groupe est un groupe hydrophile, comme un groupe carboxylique. Il est théoriquement possible de concevoir un dendrimère hydrosoluble avec l'hydrophobicité interne, qui lui permettrait de porter un composé hydrophobe dans son intérieur (afin de transporter un composé thérapeutique hydrophobe dans le sang par exemple). Une autre propriété est que le volume d'un dendrimère augmente quand il a une charge positive. Si cette propriété peut être appliquée, des dendrimères peuvent être employés pour les systèmes de transport d'éléments chimiques qui peuvent donner le médicament à la partie visée à l'intérieur du corps d'un patient directement (tumeur par exemple). Les applications sont très diverses comme un élément organique électroluminescent, comme substitut sanguin, traitement anti-cancer, outils pour la multiplication de cellules, mais aussi en matériaux lors d'associations avec des nanotubes ou comme sondes sélectives et efficaces. Fluorescence Polyamide 66 Polyamidoamines Solvatochromisme Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, 4-amino-9-methoxypropylnaphthalimide fluorescent dye (dye 1) was reacted with poly(amidoamine) dendrimer G = ?0.5 to prepare a naphthalimide–dendrimer hybrid dye (dye 2). The chemical structures of the synthesised dyes were confirmed by elemental analysis, Fourier transform infrared spectroscopy, 1H nuclear magnetic resonance spectroscopy, and ultraviolet-visible spectroscopy. The solvatochromism of the dyes was evaluated in various solvents with respect to visible absorption properties, and positive solvatochromism was observed by solvent polarity change from chloroform to ethanol. The dyeing ability of the synthesised dyes was investigated by their application onto nylon fabric, and nylon substrates dyed with dye 2 exhibited marked enhancement both in terms of colour strength and general fastness properties. The results of this study clearly demonstrated the high potential and performance of dye 2 as a novel promising fluorescent dye as compared with dye 1. Overall, it was inferred that the modification of the naphthalimide fluorescent dye with poly(amidoamine) denderimer could markedly improve the dyeing and fastness properties of the naphthalimide fluorescent dye on nylon fabrics. Note de contenu : - EXPERIMENTAL : Materials and apparatus - Synthesis of intermediates - Synthesis of dye 2 - Spectroscopic measurement of dyes - Dyebath preparation and dyeing - Fastness properties - RESULTS AND DISCUSSION : Synthesis of dye 2 - Spectroscopic properties - Fluorescence properties - Nylon dyeing properties - Fastness properties - Colour characteristics of dyed nylon fabrics DOI : 10.1111/cote.12132 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12132 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23673 [article]

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Study of the application of modified thiourea dioxide discharge agent in D5 non-aqueous medium / Lan Zhou in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 149-156 Titre : Study of the application of modified thiourea dioxide discharge agent in D5 non-aqueous medium Type de document : texte imprimé Auteurs : Lan Zhou, Auteur ; Jiang Shan, Auteur ; Xiaoyun Liu, Auteur ; Jianzhong Shao, Auteur Année de publication : 2015 Article en page(s) : p. 149-156 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de blanchiment Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Fragmentation Granulométrie Microscopie électronique à balayage Soie et constituants Textiles et tissus -- Propriétés mécaniques Textiles et tissus imprimés Thiourée Traction (mécanique) Index. décimale : 667.3 Teinture et impression des tissus Résumé : In view of the low solubility of thiourea dioxide in water and its inertia to most chemical reagents, a novel non-aqueous medium, decamethylcyclopentasiloxane, was introduced to replace water in the grinding process for better dispersibility and discharge stability. In this study, the effects of different grinding methods on the particle size distribution and surface appearance of thiourea dioxide were studied. The influences of aqueous and decamethylcyclopentasiloxane media on the discharge stability of thiourea dioxide in discharge paste were compared. The whiteness, handle, and the tensile strength of the discharge-printed fabric were evaluated. The results showed that the wet grinding process endowed thiourea dioxide with smaller particle sizes and narrower size distributions in the presence of dispersants. Decamethylcyclopentasiloxane as a non-aqueous medium was beneficial in maintaining good discharge stability of thiourea dioxide for a longer time. The fabrics discharged by the prepared thiourea dioxide printing paste had favourable whiteness, good handle, and acceptable tensile strength. Note de contenu : - EXPERIMENTAL : Materials and chemicals - Dyeing process of silk and cotton fabrics - Grinding process of discharge agent thiourea dioxide - White discharge printing process - Characterisation - RESULTS AND DISCUSSION : Particle size analysis - Field emission scanning electron microscopy - Effect of different dispersion media on the whiteness of discharged fabrics - White dischargeability in comparison with conventional discharge agents - The white discharge stability of thiourea dioxide in different dispersion media - Fabric handle - Tensile strength DOI : 10.1111/cote.12129 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12129 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23674 [article]

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Dyes derived from 3-formyl-2(1H)-quinolone – synthesis, spectroscopic characterisation, and their behaviour in the presence of sulfhydryl and non-sulfhydryl amino acids / Aleksandra Kowalska in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 157-164 Titre : Dyes derived from 3-formyl-2(1H)-quinolone – synthesis, spectroscopic characterisation, and their behaviour in the presence of sulfhydryl and non-sulfhydryl amino acids Type de document : texte imprimé Auteurs : Aleksandra Kowalska, Auteur ; Jolanta Kolinska, Auteur ; Radoslaw Podsiadly, Auteur ; Jolanta Sokolowska, Auteur Année de publication : 2015 Article en page(s) : p. 157-164 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acides aminés Les acides aminés (ou aminoacides) sont une classe de composés chimiques possédant deux groupes fonctionnels : à la fois un groupe carboxyle –COOH et un groupe amine –NH2. Parmi ceux-ci, les acides α-aminés se définissent par le fait que leur groupe amine est lié à l'atome de carbone adjacent au groupe acide carboxylique (le carbone α), ce qui leur confère la structure générique H2N–CHR–COOH, où R représente la chaîne latérale, qui identifie l'acide α-aminé. Les acides α-aminés jouent un rôle fondamental en biochimie comme constituants élémentaires des protéines : ils polymérisent en formant des liaisons peptidiques qui aboutissent à de longues chaînes macromoléculaires appelées peptides. Caractérisation Colorants -- Synthèse Spectrométrie de masse Spectroscopie de la résonance magnétique nucléaire Thiols Index. décimale : 667.3 Teinture et impression des tissus Résumé : Novel dyes based on a 3-formyl-2(1H)-quinolone skeleton were synthesised and characterised using 1H nuclear magnetic resonance spectroscopy and mass spectrometry. The spectroscopic properties of these dyes, such as their absorption spectra, emission spectra, and quantum fluorescence yields, were also examined. The behaviour of the obtained compounds at a pH of 7.4 in the absence and in the presence of thiol amino acids, such as l-cysteine, l-glutathione, and N-acetyl-l-cysteine, were studied. The spectroscopic responses of the tested dyes towards other amino acids were also investigated. A reference compound was synthesised to understand the reaction mechanism between the thiols and the obtained dyes. The experimental results show that the synthesised dyes have the potential to act as sensors for thiols. Note de contenu : - EXPERIMENTAL : General - Synthesis - Photochemical experiments - Spectroscopic responses of the studied dyes to thiols and other amino acids - RESULTS AND DISCUSSION : Synthesis and spectroscopic characterisation of the dyes - Studies of the spectroscopic response to thiols and other amino acids in a phosphate buffer ( 0.1M, pH=7.4 ) DOI : 10.1111/cote.12140 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12140 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23675 [article]

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A novel method for weft and warp yarn segmentation in multicolour yarn-dyed fabric images / Lin Luo in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 165-171 Titre : A novel method for weft and warp yarn segmentation in multicolour yarn-dyed fabric images Type de document : texte imprimé Auteurs : Lin Luo, Auteur ; Hui-Liang Shen, Auteur ; Si-Jie Shao, Auteur ; Xin John H., Auteur Année de publication : 2015 Article en page(s) : p. 165-171 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Trame  'Fils  de  chaine'  Segmentation  teints  multicolores'  Imagerie Index. décimale : 667.2 Colorants et pigments Résumé : This paper proposes a novel method for segmentation of weft and warp yarns in multicolour yarn-dyed fabric images. A multicolour yarn-dyed fabric is cross-woven by weft and warp yarns with different colours. When a multispectral imaging system is used to measure the colour of a multicolour yarn-dyed fabric image, its weft and warp yarns need to be detected before analysing their colours. Detection of interstices between weft and warp yarns is firstly conducted. A modified K-means clustering approach is then utilised to separate weft and warp yarns. The number of clusters is fixed to 2. The metric to measure the distance between a pixel and the mean of a cluster is the CIELAB colour difference. The initial means are determined by the expected values of fitted Gaussian distributions to CIExyY colour histograms. Experimental results show that the proposed method is promising for the segmentation of weft and warp yarns in multicolour yarn-dyed fabrics, with an improved segmentation accuracy and much faster processing speed than K-means clustering in CIEXYZ and CIELAB spaces. Note de contenu : - The response of multispectral imaging system - Interstice detection - Modified K-means clustering DOI : 10.1111/cote.12130 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23689 [article]

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Photochromic ink formulation for digital inkjet printing and colour measurement of printed polyester fabrics / Mohanad Aldib in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 172-182 Titre : Photochromic ink formulation for digital inkjet printing and colour measurement of printed polyester fabrics Type de document : texte imprimé Auteurs : Mohanad Aldib, Auteur Année de publication : 2015 Article en page(s) : p. 172-182 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants photochromiques Colorimétrie Décoloration Durée de stockage Durée de vie (Ingénierie) Fibres polyesters Fixation (chimie) Impression jet d'encre Impression numérique Matériaux -- Fatigue Stabilité au stockage Teinture -- Fibres textiles synthétiques Textiles et tissus imprimés Index. décimale : 667.2 Colorants et pigments Résumé : The application of a series of commercial photochromic dyes to polyester fabric by a digital inkjet printing method was investigated. Solvent-based ink systems using the dyes were formulated. The inks were characterised in terms of their physical properties which are related to the jettability of the inks, and finally the prints were fixed onto polyester fabrics by thermal fixation. Colour measurement of the printed fabrics was used to measure their degree of photocoloration, fading rate, fatigue resistance, and storage stabilities. The measured properties of the inkjet-printed fabrics were compared with the same properties of the same dyes applied to polyester fabrics by dyeing methods. The printed fabrics demonstrated inferior performance in terms of the degree of photocoloration, superior performance in the case of background colours, a higher rate of fading, and a lower fatigue resistance compared with that shown by the same dyes applied to polyester fabric by dyeing methods. Note de contenu : - EXPERIMENTAL : Colour measurement methodology and conditions - Materials - Ink formulation - Digital inkjet printing of polyester fabric with photochromic dyes - Fading characteristics, fatigue resistance, and shelf life - RESULTS AND DISCUSSION : The application of photochromic dyes to polyester fabric by an inkjet printing method - Degree of photocoloration and background colours of polyester fabric inkjet printed with photochromic dyes with different numbers of printing passes - Fading time of photochromic dyes applied to polyester fabric by an inkjet printing method - Fatigue resistance of photochromic dyes applied to polyester fabric by an inkjet printing method - Storage stability of photochromic dyes applied to polyester fabric by an inkjet printing method DOI : 10.1111/cote.12136 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12136 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23690 [article]

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