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Synthesis and application of KM-type reactive dyes containing 2-ethoxy-4-chloro-s-triazine / Qiushui Zhang in COLORATION TECHNOLOGY, Vol. 135, N° 5 (10/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 5 (10/2019) . - p. 335-348 Titre : Synthesis and application of KM-type reactive dyes containing 2-ethoxy-4-chloro-s-triazine Type de document : texte imprimé Auteurs : Qiushui Zhang, Auteur ; Wei Xiong, Auteur ; Shufen Zhang, Auteur ; Ma Wei, Auteur ; Bingtao Tang, Auteur Année de publication : 2019 Article en page(s) : p. 335-348 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Etalonnage Fixation (chimie) Hydrolyse Photostabilité Résistance au nettoyage Solubilité Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : A new kind of hetero-bifunctional reactive dye containing 2-ethoxy-4-chloro-s-triazine, with better activity matching with β-hydroxyethyl sulphone sulphate at a low fixation temperature, was successfully synthesised and characterised. An ethoxy group was designed to be introduced into triazine to increase the substantivity and the reactivity of the dyes. Thereby, the fixation of mono-s-chlorotriazine/hydroxyethyl sulphone sulphate (KM-type) bifunctional reactive dyes on cotton was improved, and dyeing under mild conditions with high fixation was realised. Nineteen dyes with orange, red and blue colours were synthesised and characterised by UV-Vis and infrared spectroscopy and mass spectrometry. Synthesised dyes were dyed at 60, 75 and 90°C, respectively. Exhaustion and reactivity for all of the ethoxy-containing KM-type dyes was over 90% at the optimal temperature, and fixation was over 87%, which was higher than the ethoxy-free comparative dyes. The optimal fixation temperature of ethoxy-containing dyes was initially reduced to 75°C, and then to 60°C. Compared with comparative dyes, the wash fastness and light fastness were basically unchanged, and the wet rub fastness of the H-acid series was reduced by one grade. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of dyes - Determination of standard curve and solubility - Study of hydrolysis reaction kinetics - Dyeing and fixing process - Measurements - RESULTS AND DISCUSSION : Synthesis and spectral properties of the dyes - Structure of dye intermediates - Structures and UV-Vis absorption spectra of KM-type reactive dyes - Determination of the hydrolysis reaction rate constant - Syeing results of KM-type and K-type reactive dyes - J-acid monoazo series reactive dyes - γ-acid monoazo series reactive dyes - H-acid series reactive dyes - Colour fastness properties of KM-type reactive dyes DOI : 10.1111/cote.12424 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12424 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33066 [article]

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Colour recipe prediction using and colony algorithm : principle of resolution and analysis of performances / Sabrine Chaouch in COLORATION TECHNOLOGY, Vol. 135, N° 5 (10/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 5 (10/2019) . - p. 349-360 Titre : Colour recipe prediction using and colony algorithm : principle of resolution and analysis of performances Type de document : texte imprimé Auteurs : Sabrine Chaouch, Auteur ; Ali Moussa, Auteur ; Imed Ben Marzoug, Auteur ; Néji Ladhari, Auteur Année de publication : 2019 Article en page(s) : p. 349-360 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Algorithmes Colorants réactifs Colorimétrie 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). Prévision, Théorie de la Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : This paper presents a new method for colour recipe prediction using ant colony optimisation. Three reactive dyes, namely CI Reactive Yellow 145, CI Reactive Red 238 and CI Reactive Blue 235, were used for colour formulation. Samples of 100% cotton fabrics were used for dyeing. The objective was to assure, control and optimise the colour formulation step by determining the dyes to be applied and their respective concentrations to reproduce the desired shades. The criterion of optimisation is to minimise the colour differences [Colour Measurement Committee (2:1)] between the target colour and the colour obtained by the proposed recipe. Errors between the proposed recipe and actual concentrations are also evaluated. The developed algorithm showed good performances with small colour differences between the target and reproduced colours (all lower than 0.7). Note de contenu : - ANT COLONY OPTIMISATION - EXPERIMENTAL : Materials - Dyeing - Colour measurement - ACO algorithm proposed for colour recipe prediction DOI : 10.1111/cote.12409 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12409 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33067 [article]

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Light stability in cyan and magenta tones using standard and highly chromatic toner particles / Igor Majnaric in COLORATION TECHNOLOGY, Vol. 135, N° 5 (10/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 5 (10/2019) . - p. 361-369 Titre : Light stability in cyan and magenta tones using standard and highly chromatic toner particles Type de document : texte imprimé Auteurs : Igor Majnaric, Auteur ; Marko Moric, Auteur ; Damir Modric, Auteur Année de publication : 2019 Article en page(s) : p. 361-369 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cyan Le cyan est, par définition, la couleur primaire complémentaire du rouge, dans la synthèse soustractive des couleurs utilisée en photographie argentique en couleurs et en imprimerie. Imprimerie Magenta Le magenta est un colorant rouge violacé d'aniline de synthèse inventé en 1858, appelé fuchsine ou roséine. C'est aussi la désignation normalisée du colorant primaire absorbant le vert dans la synthèse soustractive des couleurs en imprimerie et en photographie argentique. Photostabilité Pigments Index. décimale : 667.2 Colorants et pigments Résumé : An increasing requisite regarding the reproduction quality of electrophotographic printing machines demands improvement of new electrophotographic toner formulation, especially used pigments. The subject of this paper is a comparison of prints realised by depositing high chroma (HC) and standard emulsion aggregation (EA) toner on gloss fine art paper. HC toner has a different composition of the cyan and magenta tones compared with the corresponding standard EA toner tones and therefore behaves differently under real conditions. The patches used for this experiment were cyan and magenta tone prints with tone values (TVs) of 0, 20, 60 and 100%. Ultraviolet (UV) degradation was measured over time intervals of 0, 6, 12, 24, 48, 96, 144 and 240 h for all patches. Results (laboratory values) were calculated using colorimetric difference. Values were plotted as a function of time in tonal degradation graphs. A model was created using non‐linear regression‐based modelling. The experiment demonstrates that magenta patches are more susceptible to degradation in comparison with cyan patches. With the increase in tonal value, it is noticeable that the colorimetric difference is higher. Colorimetric differences calculated using HC magenta toner and standard EA cyan toner (100% TV) were higher than ∆E = 5, starting to appear after 6 h of exposure to UV radiance. After 12 h of exposure, colorimetric differences of standard magenta tones that were greater than ∆E = 5 also started to appear. Cyan patches (100% TV) printed with HC toner were more stable than the other patches, and after 240 h of exposure had not crossed the boundary of ∆E = 5. Note de contenu : - Toners for EP printing DOI : 10.1111/cote.12422 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12422 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33068 [article]

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Preparation of carboxylated graphene oxide nanosheets/polysulphone hollow fibre separation membranes with improved separation and dye adsorption properties / Wenying Shi in COLORATION TECHNOLOGY, Vol. 135, N° 5 (10/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 5 (10/2019) . - p. 370-382 Titre : Preparation of carboxylated graphene oxide nanosheets/polysulphone hollow fibre separation membranes with improved separation and dye adsorption properties Type de document : texte imprimé Auteurs : Wenying Shi, Auteur ; Xianhua Zeng, Auteur ; Li Hongbin, Auteur ; Rong Zhou, Auteur ; Hai-Xia Zhang, Auteur Année de publication : 2019 Article en page(s) : p. 370-382 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Caractérisation Carboxylation Colorants -- Adsorption Fibres creuses Filature à sec Filature au mouillé Procédé dans lequel une solution de substance fibrogène est extrudée dans un milieu liquide de coagulation où le polymère est régénéré, comme dans la fabrication de la viscose ou de la rayonne cuproammoniacale. Membranes (technologie) Morphologie (matériaux) Nanoparticules Oxyde de graphène Polysulfones Séparation (technologie) Index. décimale : 677.6 Tissus obtenus par des procédés spéciaux, quelle que soit leur composition : jacquard, feutres tissés et non tissés, tapisseries, tissus ajourés Résumé : Novel hollow fibre polysulphone (PSF) separation membranes were prepared via the incorporation of carboxylated graphene oxide (cGO) in membrane matrix during the dry‐wet spinning process to improve the membrane performance of water flux and dye adsorption. The surface composition and morphology of the prepared cGO‐incorporated hollow fibre membranes were characterised by means of Fourier Transform–infrared spectra and scanning electron microscopy. The effects of different cGO contents on membrane surface hydrophilicity, separation performance, anti‐compaction and adsorption properties were investigated through measurements of the water contact angle, cross‐flow filtration and methylene blue (MB) adsorption experiments. The results demonstrated that the cGO‐incorporated membranes had more hydrophilic surfaces, higher permeation flux, better anti‐compaction properties and a higher adsorption rate of MB than that of the PSF control membrane. When cGO content was 0.45 wt.%, the pure water flux of the modified membrane increased from 90.56 to 148.26 l m−2 h−1 at 0.1 MPa; also, rejections of bovine serum albumin and polyethylene glycol (PEG‐20000) maintained relatively high values of 98.81 and 93.89%, respectively. The incorporation of cGO nanosheets could effectively improve membrane anti‐compaction properties and the adsorption rate of MB. Note de contenu : - EXPERIMENTAL : Materials - Preparation of hollow fibre membranes - Characterisation of PSF support membrane - RESULTS AND DISCUSSION : Chemical compositions of the membrane surface - Morphology of cGO nanosheets - Surface morphology of different membranes - Water flux of different membranes - Separation performance of different membranes - The anti-compaction of different membranes - Stability of membrane separation performance - Adsorption properties of different membranes DOI : 10.1111/cote.12423 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12423 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33069 [article]

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Poly(methyl methacrylate)/polysiloxane core-shell latex as a deepening agent for dyed polyester fabric / Chengbing Yu in COLORATION TECHNOLOGY, Vol. 135, N° 5 (10/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 5 (10/2019) . - p. 383-390 Titre : Poly(methyl methacrylate)/polysiloxane core-shell latex as a deepening agent for dyed polyester fabric Type de document : texte imprimé Auteurs : Chengbing Yu, Auteur ; Yilin Lu, Auteur ; Yixun Chang, Auteur ; Dan Yang, Auteur Année de publication : 2019 Article en page(s) : p. 383-390 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Core-Shell Latex Polyesters Polyméthacrylate de méthyle Le poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec. Réfraction, Indice de Silicones Les silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki). Solidité de la couleur Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : Polyester fabrics are usually difficult to dye deeply due to their high refractive indexes. In this study, poly(methyl methacrylate)/polysiloxane core-shell latex was used as a deepening agent in the colour-deepening finishing of dyed polyester fabrics by lowering the refraction index and enhancing the diffuse reflection via the rough surface. Poly(methyl methacrylate)/polysiloxane core-shell latex has a better shade-deepening effect than polysiloxane latex on dyed polyester fabrics. The mass ratio of core/shell monomer and the finishing conditions of the polyester fabrics had a large influence on shade deepening. The optimum finishing conditions were obtained for a mass ratio of core/shell monomer of 1:2, a deepening agent concentration of 10 wt%, a pick-up of 80%, and a curing temperature of 180°C. After a deepening finishing, the dyed polyester fabrics showed a small colour difference and the colour fastness barely decreased. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of the deepening agents - Dyeing - Deepening finishing - K/S values and colorimetric data - RESULTS AND DISCUSSION : Shade deepening with PMMA/polysiloxane core-shell latex - Effect of the mass ratio of core/shell monomer - Influence of the finishing conditions - Colour difference and colour fastness DOI : 10.1111/cote.12425 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12425 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33070 [article]

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Aryl and heteroaryl azo dyes derived from 6, 8-dichloro-4-hydroxyquinolin-2 (1H)-one: synthesis, characterisation, solvatochromism and spectroscopic properties / Enayat Ollah Moradi Rufchahi in COLORATION TECHNOLOGY, Vol. 135, N° 5 (10/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 5 (10/2019) . - p. 391-406 Titre : Aryl and heteroaryl azo dyes derived from 6, 8-dichloro-4-hydroxyquinolin-2 (1H)-one: synthesis, characterisation, solvatochromism and spectroscopic properties Type de document : texte imprimé Auteurs : Enayat Ollah Moradi Rufchahi, Auteur ; Ali Ghanadsadeh Gilani, Auteur Année de publication : 2019 Article en page(s) : p. 391-406 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Colorants -- Propriétés spectrales Colorants -- Synthèse Colorants azoïques Solvatochromisme Index. décimale : 667.2 Colorants et pigments Résumé : In this research study, 6, 8-dichloro-4-hydroxyquinolin-2(1H)-one was prepared by the thermal cyclocondensation of 2-(2, 4-dichlorophenylcarbamoyl) acetic acid or N, N’-bis(2,4-dichlorophenyl)malonamide at 140-150°C in polyphosphoric acid, resulting in a yield of 48 %. This compound was then coupled with a series of diazonium salts derived from aromatic and heteroaromatic amines for synthesis of the corresponding azo dyes. The structures of the compounds were confirmed using elemental analysis as well as ultraviolet-visible, Fourier Transform-infrared and proton nuclear magnetic resonance spectroscopy. The effects of organic solvents with different polarities, pH values and substituents of the diazotising components on the maximum absorption wavelength of the colorants were discussed and evaluated in detail. The acidity constants (pKa) of the dyes were also determined using the spectrophotometric method in an ethanol-water mixture (80:20, v/v) at 20-23°C. Note de contenu : - EXPERIMENTAL : Materials and instrumentation - Synthesis and characterisation - RESULTS AND DISCUSSION : Synthesis and characterisation - UV-vis and solvatochromic studies of synthesised dyes - Determination of pKa value of the dyes in ethanol-aqueous buffer solution DOI : 10.1111/cote.12426 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12426 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33071 [article]

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Towards the design of a blending system for precoloured fibres / Caroline Hemingray in COLORATION TECHNOLOGY, Vol. 135, N° 5 (10/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 5 (10/2019) . - p. 407-414 Titre : Towards the design of a blending system for precoloured fibres Type de document : texte imprimé Auteurs : Caroline Hemingray, Auteur ; Louise Dean, Auteur ; Stephen Westland, Auteur Année de publication : 2019 Article en page(s) : p. 407-414 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie physique et théorique Couleur -- Analyse Mélanges de fibres Tricot Index. décimale : 667.3 Teinture et impression des tissus Résumé : In order to create a commercial system for blending precoloured fibres that will appear visually solid once combined, it is necessary to understand the maximum colour difference required between the blend components. Based on this understanding, the lowest number of primaries required to populate a given colour gamut can be determined. A series of psychophysical experiments was carried out to explore the colour difference between fibre-blend components and whether the resulting blended samples are perceived as visually solid. Experiments were carried out with loose stock fibre, yarn and knitted samples. Generally, it was found that the likelihood a blend appeared as visually solid increased as the average colour difference between the blend components, or primaries, decreased. The value of the mean colour difference at which 50% of participants viewed the blend as being visually solid was found to be 20.8, 20.5 and 18.0 for fibre, yarn and knitted samples, respectively. Consequently, it was found that it was more difficult to obtain a solid shade with the knitted form than with the loose stock fibre form. Note de contenu : - EXPERIMENTAL : Determination of the colour difference threshold between primaries - Preparation of samples - Physicophysical experiments - RESULTS AND DISCUSSION : Implications for commercial fibre blending systems DOI : 10.1111/cote.12428 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12428 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33072 [article]

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