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A new method to measure the solubility of disperse dyes in water at high temperature / Martin Ferus-Comelo in COLORATION TECHNOLOGY, Vol. 131, N° 4 (08/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 4 (08/2015) . - p. 269-271 Titre : A new method to measure the solubility of disperse dyes in water at high temperature Type de document : texte imprimé Auteurs : Martin Ferus-Comelo, Auteur Année de publication : 2015 Article en page(s) : p. 269-271 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Solubilité Colorants dispersés Catégorie de colorants très peu solubles dans l'eau, utilisés à l'origine comme colorants pour l'acétate, et qui généralement sont appliqués sous forme de suspensions aqueuses de faible concentration.Les colorants dispersés sont largement utilisés dans la teinture de la plupart des fibres manufacturées, surtout le polyester. Eau Hautes températures Mesure Index. décimale : 667.3 Teinture et impression des tissus Résumé : This feature article describes a promising technique that can shed new light on the behaviour of one of the most commercially important classes of textile colourant. Disperse dyes are the only industrially significant means of exhaustion dyeing polyester, the highest-volume synthetic textile material. Successful coloration depends upon disperse dye solubility. However, accurate measurement of this parameter at typical operating conditions is not an easy feat. In addition, numerous previous studios examining solubility have net factored in strong influences that will affect real-world disperse dye formulations. These aspects include physical form and the presence of additives. The methodology reported in this Feature article addresses such Shortcomings. It is capable of providing insights into the performance of marketed products under the exact conditions of their application, which has hitherto not been possible. This novel approach allow technologists to compare the impact of subtle differences in variables such as colorant particle size distribution, impurity profile, and dispersant concentration an solubility. In doing so, it could facilitate the design of better-performing and more cost-effective disperse due systems. DOI : 10.1111/cote.12153 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12153 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24425 [article]

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Synthesis of some symmetrically substituted stilbene-triazine derivatives containing tetramethylenepiperidine fragments and their application to make self-whitening polyacrylonitrile / Polya M. Miladinova in COLORATION TECHNOLOGY, Vol. 131, N° 4 (08/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 4 (08/2015) . - p. 272-278 Titre : Synthesis of some symmetrically substituted stilbene-triazine derivatives containing tetramethylenepiperidine fragments and their application to make self-whitening polyacrylonitrile Type de document : texte imprimé Auteurs : Polya M. Miladinova, Auteur Année de publication : 2015 Article en page(s) : p. 272-278 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de blanchiment Composés organiques -- Synthèse Copolymérisation Fluorescence Photostabilité Polyacrylonitrile Index. décimale : 667.3 Teinture et impression des tissus Résumé : This study reports the synthesis of nine new fluorescent stilbene-triazine whitening agents containing a tetramethylpiperidine fragment. These products were isolated and characterised by spectroscopic techniques, i.e. infrared, ultraviolet, and fluorescent spectra, and confirmed by proton nuclear magnetic resonance spectroscopy. The photostability of the new compounds and two optical brighteners containing an unsaturated group without a stabiliser fragment was studied. It was found that the compounds containing tetramethylpiperidine have better photostability. The possibility of the copolymerisation of the unsaturated compounds with acrylonitrile was investigated, and self-whitening polymers with an intense blue fluorescence were obtained. It was established that 85–86% of the fluorophores are chemically bound to the polymer chain. Note de contenu : - EXPERIMENTAL : Materials, equipment, and analyses - Synthesis of the compounds - Photostability of the compounds - Polymerisation of acrylonitrile - RESULTS AND DISCUSSION : Synthesis of the compounds - Spectroscopic investigations - Photostability of the compounds - Preparation of the polymers DOI : 10.1111/cote.12152 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12152 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24426 [article]

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The design of optimal real gabor filters and their applications in fabric defect detection / Zehong Chen in COLORATION TECHNOLOGY, Vol. 131, N° 4 (08/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 4 (08/2015) . - p. 279-287 Titre : The design of optimal real gabor filters and their applications in fabric defect detection Type de document : texte imprimé Auteurs : Zehong Chen, Auteur ; Xiaoxia Feng, Auteur Année de publication : 2015 Article en page(s) : p. 279-287 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Détection de défauts (Ingénierie) Gabor, Filtre de Un filtre de Gabor est un filtre linéaire dont la réponse impulsionnelle est une sinusoïde modulée par une fonction gaussienne (également appelée ondelette de Gabor). Il porte le nom du physicien anglais d'origine hongroise Dennis Gabor. Textiles et tissus -- Défauts Index. décimale : 667.3 Teinture et impression des tissus Résumé : Fabric defect detection has been recognised as one of the key challenges for automatic production, and Gabor filters are one of the most useful tools in detecting fabric defects. The half-peak tangent method is applied in real Gabor filter design so that the filters can cover the frequency of defects as much as possible. Meanwhile, the half-peak-magnitude contours of the neighbouring filters are tangential. On this basis, two optimal orientations are selected by applying direction masks, and the optimal scale at each optimal orientation is determined according to the signal-to-noise ratio. In this way, two optimal real Gabor filters are obtained. A new algorithm based on the two optimal filters is proposed for fabric defect detection. A series of experiments are carried out for 46 fabric defect images combined with 46 corresponding reference fabric images, in order to verify the effectiveness of the new algorithm. The experimental results obtained show that the new algorithm can accurately detect defects in grey fabric defect images as well as in colour images. For the 46 fabric defect images, the detection rate is 95.66%, indicating that the new algorithm performs well. In addition, comparison of the new algorithm with other algorithms in the literature demonstrates that the new algorithm is more effective in the detection of several fabric defect images. Note de contenu : - RELATED THEORIES OF GABOR FILTERS - THE DESIGN OF REAL GABOR FILTERS WITH MULTIPLE SCALES AND MULTIPLE ORIENTATIONS : Determining the orientation angles of real gabor filters - Determining the standard deviations of real gabor filters - Determining the radial frequencies of real gabor filters - OBTAINING TWO OPTIMAL REAL GABOR FILTERS FOR FABRIC DEFECT DETECTION : Detection the optimal orientations of real gabor filters by direction masks - Determining the corresponding optimal scales by the signal-to-noise ratio - A NEW ALGORITHM BASED ON THE TWO REAL GABOR FILTERS FOR FABRIC DEFECT DETECTION - A SERIES OF EXPERIMENTS APPLYING THE NEW ALGORITHM : Detecting defects in grey fabric images by the new algorithm - Detecting defects in colour fabric images by the new algorithm - Comparing the new algorithm with other algorithm DOI : 10.1111/cote.12154 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12154 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24427 [article]

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Synthesis of pharmacological dyes and their application on synthetic fabrics / Mounir A. I. Salem in COLORATION TECHNOLOGY, Vol. 131, N° 4 (08/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 4 (08/2015) . - p. 288-297 Titre : Synthesis of pharmacological dyes and their application on synthetic fabrics Type de document : texte imprimé Auteurs : Mounir A. I. Salem, Auteur ; Magda I. Marzouk, Auteur ; Hamada Mashaly, Auteur Année de publication : 2015 Article en page(s) : p. 288-297 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens Colorants -- Synthèse Colorants azoïques Essais (technologie) Essais de résilience Fibres polyesters Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : Seven new azo dyes were prepared by linking various amino derivatives to barbituric acid through diazo coupling reactions. The structures of the azo dyes were identified by elemental analyses and by Fourier transform infrared, proton nuclear magnetic resonance, and mass spectral data. The barbituric acid dyes exist in five different tautomeric forms, with the Fourier transform infrared and proton nuclear magnetic resonance spectra confirming the existence of these dyes in triketo tautomeric form in the solid state and in the diketo form in the liquid state. All the compounds were tested for their antibacterial, antifungal, anticancer, and antioxidant activity. The prepared dyestuffs were dyed on polyester fabrics, and subsequently their dyeing properties and their light, washing, perspiration, rubbing, and sublimation fastness were determined. Note de contenu : - EXPERIMENTAL : Materials and apparatus - General procedure for the synthesis of diazo dyes 4 to 10 - Antimicrobial activity - Preparation of the test compounds - Testing for antibacterial and yeast activity - Testing for antifungal activity - Cytotoxicity assay - MIT assay - Antioxidant assay - Bleomicin-dependent DNA damage - Bleomycin-dependent DNA damage assay - Dyeing and fastness determinations - RESULTS AND DISCUSSION : Antimicrobial activity - Pharmalogical activity - Structure relationship - Fastness to washing - Fastness to perspiration (acid alkaline) - Fastness to rubbing - Fastness to sublimation - Fastness to light - Colour assessment DOI : 10.1111/cote.12155 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12155 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24428 [article]

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An investigation of an instrument-based method for assessing colour fastness to light of photochromic textiles in COLORATION TECHNOLOGY, Vol. 131, N° 4 (08/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 4 (08/2015) Titre : An investigation of an instrument-based method for assessing colour fastness to light of photochromic textiles Type de document : texte imprimé Année de publication : 2015 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants Laine Photochromisme Photostabilité Polyesters Solidité de la couleur Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : A new method for evaluating the light fastness of photochromic fabrics was established, aimed at replacing the conventional method with an instrumental method. This method was based on comparing the colour difference of photochromic fabrics after light exposure with measured values of the colour differences of the blue wool references after fixed periods of light exposure. This method benefits from replacing the traditional visual evaluation of colour difference between exposed and unexposed areas of textile samples with a more accurate, instrument-based measurement of the colour difference. The light fastness is then evaluated by comparing the colour difference with tabulated values of colour differences brought about by light exposure, for increased periods of time, of standard blue wool references. This method could be used for measuring light fastness of both traditional and photochromic fabrics. However, blue wool references and tested samples should be exposed to light under similar conditions when using this method to measure colour fastness to light of fabrics. Note de contenu : - Principles of the instrument-based method of light fastness measurement - Assessment of colour fastness to light of polyester fabric dyed with photochromic dyes 1 to 6 by the exhaust dyeing method DOI : 10.1111/cote.12156 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12156 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24429 [article]

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The minimum number of measurements for colour, sparkle, and graininess characterisation in gonio-apparent panels / Elisabet Chorro in COLORATION TECHNOLOGY, Vol. 131, N° 4 (08/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 4 (08/2015) . - p. 303-309 Titre : The minimum number of measurements for colour, sparkle, and graininess characterisation in gonio-apparent panels Type de document : texte imprimé Auteurs : Elisabet Chorro, Auteur ; Esther Perales, Auteur ; Francisco J. Burgos, Auteur ; Omar Gomez, Auteur ; Meritxell Vilaseca, Auteur ; Valentin Viqueira, Auteur ; Jaume Pujol, Auteur ; Francisco M. Martinez-Verdù, Auteur Année de publication : 2015 Article en page(s) : p. 303-309 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Matériaux gonio-apparents Mesure Statistique Index. décimale : 667.3 Teinture et impression des tissus Résumé : Materials with new visual appearances have emerged over the last few years. In the automotive industry in particular there is a growing interest in materials with new effect finishes, such as metallic, pearlescent, sparkle, and graininess effects. Typically, for solid colours the mean of three measurements with repetitions is sufficient to obtain a representative measurement for colour characterisation. However, gonio-apparent panels have non-homogeneous colours, and there are no studies that recommend the minimum number of repetitions for colour, sparkle, and graininess characterisation of this type of panel. We assume that colour panels incorporating special-effect pigments in their colour recipes will require a higher minimum number of measurements than solid colour panels. Therefore, the purpose of this study is to verify this assumption by using a multiangle BYK-mac spectrophotometer, given that it is currently the only commercial device that can measure colour, sparkle, and graininess values simultaneously. In addition, a possible methodology is given for establishing the minimum number of measurements when characterising gonio-apparent materials using a specific instrument, able to be implemented in future instruments when determining multiple appearance attributes (colour, gloss, sparkle, etc.) for many coloration technologies. Thus, we studied the minimum number of measurements needed to characterise the colour, sparkle, and graininess of three types of sample with solid, metallic, and pearlescent coatings respectively. Twenty measurements were made at twenty random positions (different target areas) of 90 samples. The minimum number of measurements for all these variables was determined on the basis of the point at which the cumulative mean value became constant. Thus, applying new statistical tools, it is clearly shown that metallic and pearlescent panels require more colour measurements than solid panels, in particular when geometries are being measured in a specular direction. As regards texture (sparkle and graininess), more measurements are needed for graininess than for sparkle, and more for metallic panels than for pearlescent panels. Note de contenu : - MATERIALS AND METHODS : Measurement device - Sample measurement - Statistical analysis - RESULTS : Colour measurements - Sparkle measurements - Graininess measurements DOI : 10.1111/cote.12157 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12157 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24430 [article]

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Effects of additives on the dyeing of cotton yarn with the aqueous extract of combretum latifolium blume stems / Montra Chairat in COLORATION TECHNOLOGY, Vol. 131, N° 4 (08/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 4 (08/2015) . - p. 310-315 Titre : Effects of additives on the dyeing of cotton yarn with the aqueous extract of combretum latifolium blume stems Type de document : texte imprimé Auteurs : Montra Chairat, Auteur ; John B. Bremner, Auteur ; Siritron Samosorn, Auteur ; Warayuth Sajomsang, Auteur ; Wassana Chongkraijak, Auteur ; Anongnet Saisara, Auteur Année de publication : 2015 Article en page(s) : p. 310-315 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Additifs Chitosane Le chitosane ou chitosan est un polyoside composé de la distribution aléatoire de D-glucosamine liée en ß-(1-4) (unité désacétylée) et de N-acétyl-D-glucosamine (unité acétylée). Il est produit par désacétylation chimique (en milieu alcalin) ou enzymatique de la chitine, le composant de l'exosquelette des arthropodes (crustacés) ou de l'endosquelette des céphalopodes (calmars...) ou encore de la paroi des champignons. Cette matière première est déminéralisée par traitement à l'acide chlorhydrique, puis déprotéinée en présence de soude ou de potasse et enfin décolorée grâce à un agent oxydant. Le degré d'acétylation (DA) est le pourcentage d'unités acétylées par rapport au nombre d'unités totales, il peut être déterminé par spectroscopie infrarouge à transformée de Fourier (IR-TF) ou par un titrage par une base forte. La frontière entre chitosane et chitine correspond à un DA de 50 % : en deçà le composé est nommé chitosane, au-delà, chitine. Le chitosane est soluble en milieu acide contrairement à la chitine qui est insoluble. Il est important de faire la distinction entre le degré d'acétylation (DA) et le degré de déacétylation (DD). L'un étant l'inverse de l'autre c'est-à-dire que du chitosane ayant un DD de 85 %, possède 15 % de groupements acétyles et 85 % de groupements amines sur ses chaînes. Le chitosane est biodégradable et biocompatible (notamment hémocompatible). Il est également bactériostatique et fongistatique. Le chitosane est également utilisé pour le traitement des eaux usées par filtration ainsi que dans divers domaines comme la cosmétique, la diététique et la médecine. Colorants végétaux 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). Flavonoïdes Plantes tinctoriales Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Flavonoid constituents from the aqueous extract of the stems of Combretum latifolium Blume sourced in Thailand have potential use as dyestuffs for cotton dyeing. In an effort to improve current natural dyeing methods with this extract, further aspects of the process were studied. It was found that, before equilibrium was reached, an increase in temperature led to an increase in dye adsorption rate of the extract; the initial rate and extent of dye adsorption was further increased by the addition of sodium chloride to the dyebath. In addition, cotton yarn pretreated with a chitosan solution (with and without a crosslinking glyoxal solution), followed by dyeing with C. latifolium extract, provided better depth of shade and also gave better fastness to light and washing than the untreated cotton yarn. Post-mordanting cotton yarn with a biomordant solution from Memecylon scutellatum leaves also gave good light and wash fastness of the resulting dyed cotton, comparable with the dyeing results with the less environmentally friendly alum as a mordant. Note de contenu : - EXPERIMENTAL : Materials and chemicals - Cotton pretreatment with chitosan solution - Preparation of an aqueous leaf extract of M. scutellatum - Preparation of crude dye powder from the aqueous extract of C. latifolium - Determination of the flavonoid content in C. latifolium stem extracts - Instruments - METHODS : Effect of sodium chloride on the dyeing of cotton yarn - Dyeing of untreated and treated cottonyarn with the C. latifolium dye extract - RESULTS AND DISCUSSION : Effect of dyeing temperature - Effect of sodium chloride on the adsorption of dye extract onto cotton yarn without pH control - Flavonoid content of the C. latifolium stem extracts - Effect of temperature on the adsorption of dye extract on cotton in the presence of sodium chloride - Colour hue and fastness properties of the dyed cotton DOI : 10.1111/cote.12158 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12158 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24431 [article]

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A hemicyanine fluorescent reactive cationic dye : synthesis and applications on wool fabrics / Wei Zhang in COLORATION TECHNOLOGY, Vol. 131, N° 4 (08/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 4 (08/2015) . - p. 316-321 Titre : A hemicyanine fluorescent reactive cationic dye : synthesis and applications on wool fabrics Type de document : texte imprimé Auteurs : Wei Zhang, Auteur ; Yan Zhang, Auteur ; Yanqiu Cheng, Auteur ; Chuanxiang Qin, Auteur ; Guoqiang Chen, Auteur Année de publication : 2015 Article en page(s) : p. 316-321 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Colorants -- Propriétés tinctoriales Colorants -- Synthèse Fluorescence Hemicyanine Laine Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : A novel hemicyanine fluorescent reactive cationic dye was synthesised by the reaction between the free amino group of a hemicyanine fluorescent dye and 2,3-dibromopropionyl chloride. The dye was characterised by proton nuclear magnetic resonance spectroscopy, high-resolution mass spectrometry, ultraviolet-visible absorption spectrometry, and single-photon fluorescence spectrometry. The prepared dye was applied to wool fabrics to give fluorescent orange shades. The colour fastness of the dyed wool fabrics was tested. Results show that dyed fabrics using the novel hemicyanine fluorescent reactive cationic dye could be used as fluorescent clothing. Note de contenu : - EXPERIMENTAL : Materials - Synthesis - Dyeing process - Measurements - RESULTS AND DISCUSSION : Characterisation - Dyeing properties - Fluorescent properties of the dyed wool fabrics DOI : 10.1111/cote.12159 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12159 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24432 [article]

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Methylene blue adsorption by chemically activated waste pork bones / Unai Iriarte-Velasco in COLORATION TECHNOLOGY, Vol. 131, N° 4 (08/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 4 (08/2015) . - p. 322-332 Titre : Methylene blue adsorption by chemically activated waste pork bones Type de document : texte imprimé Auteurs : Unai Iriarte-Velasco, Auteur ; Irene Sierra, Auteur ; Emilio Atilano Cepeda, Auteur ; Raquel Bravo, Auteur ; Jose Luis Ayastuy, Auteur Année de publication : 2015 Article en page(s) : p. 322-332 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bleu de méthylène Colorants -- Adsorption Déchets organiques -- Recyclage Hydroxyapatite L'hydroxyapatite est une espèce minérale de la famille des phosphates, de formule Ca5(PO4)3(OH), usuellement écrite Ca10(PO4)6(OH)2 pour souligner le fait que la maille de la structure cristalline comprend deux molécules. L'hydroxyapatite est le membre hydroxylé du groupe apatite. L'ion OH- peut être remplacé par le fluor, le chlore ou le carbonate. L'hydroxyapatite cristallise dans le système hexagonal. La poudre d'hydroxyapatite pure est blanche. Celles que l'on trouve dans la nature peuvent cependant être de couleur marron, jaune ou verte. Index. décimale : 667.3 Teinture et impression des tissus Résumé : Bone is an inorganic template containing organic material inside which can be converted into hydroxyapatite-rich material by pyrolysis. Nowadays, there is a growing research interest in the use of hydroxyapatite, the chemical formula of which is Ca10(PO4)6(OH)2. In the present work, pork bone, an abundant biomass source and food waste, has been converted into structured porous hydroxyapatite by a three-step process including precharring under mild conditions, chemical activation, and thermal activation. The investigated activating agents were NaOH, KOH, K2CO3, H2SO4, and H3PO4. A thorough investigation of the influence of different activating protocols on the chemical and textural properties of the produced material was carried out by nitrogen adsorption–desorption at 77 K, potentiometric titrations, Fourier transform infrared, and X-ray diffraction techniques. Chemical activation with NaOH, K2CO3, and H2SO4 increased the specific surface area up to 53%. H3PO4 reduced both surface area and pore volume, and KOH showed little influence on the pore structure. The produced materials were evaluated by methylene blue adsorption tests and showed significant improvement as a result of chemical activation. As a main effect, acid treatment increased methylene blue adsorption kinetics, probably owing to an increase in micropororosity, whereas alkali activation enhanced the adsorption capacity of the resultant biochar. Note de contenu : - EXPERIMENTAL : Materials - Physicochemical characterisation - Adsorption tests - RESULTS AND DISCUSSION : Mass yield - Pore size distribution and textural properties - Physicochemical characterisation - Adsorption kinetics : intraparticle diffusion model - Equilibrium adsorption DOI : 10.1111/cote.12160 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12160 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24433 [article]

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Synthesis, characterisation, and applications of isoindigo/Pechmann dye heteroanalogue hybrid dyes on polyester fabric / Tarek Aysha in COLORATION TECHNOLOGY, Vol. 131, N° 4 (08/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 4 (08/2015) . - p. 333-341 Titre : Synthesis, characterisation, and applications of isoindigo/Pechmann dye heteroanalogue hybrid dyes on polyester fabric Type de document : texte imprimé Auteurs : Tarek Aysha, Auteur ; Mervat El-Sedik, Auteur ; Hamada M. Mashaly, Auteur ; Morsy A. El-Apasery, Auteur ; OldÅ™ich Machalický, Auteur ; Radim Hrdina, Auteur Année de publication : 2015 Article en page(s) : p. 333-341 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bains de teinture -- Analyse Caractérisation Colorants -- Synthèse Fibres polyesters Résistance au lavage Solidité de la couleur Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : A series of new dyes based on the N-analogue of Pechmann hybrid dyes were prepared by the condensation of different 5-aryl derivatives of pyrrolinone ester (phenyl, 4-bromophenyl, thienyl, and biphenyl) with isatin. N-Alkylated derivatives were also prepared using bromoethyl acetate. Full 1H and 13C NMR assignment was performed. All prepared dyes were soluble in most organic solvents: N-alkylated derivatives had better solubility than non-alkylated derivatives. The UV-vis absorption spectra of the derivatives under study are quite similar and exhibit maxima in the 509–526 nm range. No E/Z photoisomerisation is observed. The dyeing process, dye exhaustion on polyester, and the fastness properties of the dyes were examined. Note de contenu : - EXPERIMENTAL : Materials and equipment - Synthesis and analytics - Dyeing process at 130°C and calculation of percentage dyebath exhaustion - Colour fastness to washing - Colour fastness to rubbing - Dry crocking test - Wet crocking test - Colour fastness to perspiration - Colour fastness to light - RESULTS AND DISCUSSION : Synthesis - NMR spectroscopy - UV-vis absorption spectra - Dyeing and percentage dyebath exhaustion DOI : 10.1111/cote.12161 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12161 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24434 [article]

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A multispectral imaging approach to colour measurement and colour matching of single yarns without winding / Lin Luo in COLORATION TECHNOLOGY, Vol. 131, N° 4 (08/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 4 (08/2015) . - p. 342-351 Titre : A multispectral imaging approach to colour measurement and colour matching of single yarns without winding 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. 342-351 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Fil Imagerie (technique) Spectroscopie de réflectance Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : This paper investigates a multispectral imaging approach to colour measurement and colour matching of single yarns. The small size of a single yarn makes it impossible for spectrophotometers directly to acquire its spectral reflectance. Multispectral imaging systems, on the other hand, have the potential to measure the reflectance of single yarns as they can record both the spectral and the spatial information of a sample. A multispectral imaging system, namely imaging colour measurement, has been developed to conduct colour measurement of single yarns. A single yarn is first detected from backgrounds by a modified K-means clustering method. The reflectance of the single yarn is then specified by an averaging method. Comparative experiments based on 100 pairs of single yarns and corresponding yarn windings show that the reflectance magnitude of a single yarn acquired by imaging colour measurement is smaller than that of corresponding yarn winding measured by a Datacolor 650 spectrophotometer. Experiments on 16 single yarns show that the repeatability and spatial reproducibility of the imaging colour measurement system in measuring a single yarn colour are 0.1185 and 0.2827 CMC(2:1) units. A colour matching comparison experiment (pass or fail), using 24 pairs of single yarns and corresponding pairs of solid-colour yarn dyed fabrics, shows that single yarns measured by imaging colour measurement can achieve similar colour matching results to solid-colour yarn dyed fabrics measured by the Datacolor 650 spectrophotometer, with degrees of similarity of 87.5 and 83.3% when the CMC(2:1) and CIE2000(2:1:1) colour difference formulas are employed. Note de contenu : - EXPERIMENTAL : Step 1 : Segment single yarns from backgrounds - Step 2 : Specify the reflectance of single yarns - RESULTS AND DISCUSSION : Multispectral imaging system introduction - Colour measurement comparison between single yarns and corresponding yarn windings - Repeatability and spatial reproducibility - Instrumental colour matching experiment DOI : 10.1111/cote.12162 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12162 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24435 [article]

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