Dépouillements

Determination of dyers' perceived components of colour difference (depth, brightness and hue) between two similar colours from their spectral reflectance values / Roger H. Wardman in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 161-168 Titre : Determination of dyers' perceived components of colour difference (depth, brightness and hue) between two similar colours from their spectral reflectance values Type de document : texte imprimé Auteurs : Roger H. Wardman, Auteur ; Salma Farooq, Auteur ; Ken J. Smith, Auteur Année de publication : 2012 Article en page(s) : p. 161-168 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Algorithmes Colorimétrie Spectroscopie de réflectance Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : The partitioning of colour differences into ΔL*, ΔC* and ΔH* is not directly equivalent to the dyer’s method of partitioning. The dyer’s method involves separation into the components of depth (ΔD), brightness (ΔB) and hue (ΔH), of which only hue difference has a qualitative (and quantitative) equivalent in the CIELAB system. Depth and brightness are important terms to dyers. Depth is related to the amount of dye taken up by a textile material and brightness to that component of colour difference that is neither depth nor hue. Brightness is best defined as the opposite of dullness, dullness being related to the amount of neutral grey present in the colour. An algorithm, called the Wardman–Smith–Farooq algorithm, has been developed to compute the dyers’ variables of ΔD,ΔB and ΔH from spectral reflectance values, enabling dyers to take full advantage of colorimetry. The algorithm is based on extensive experimental work to map surfaces of constant visual depth through the colour space and this paper describes the methodology of the calculation. The correlations of the values of ΔD,ΔB and ΔH, determined using the Wardman–Smith–Farooq algorithm with other empirical models for 117 sample pairs, are given. Note de contenu : - EXPERIMENTAL : Development of the WSF algorithm - Stages of the algorithm - RESULTS AND DISCUSSION : Comparison with the DBH and sato models - Performance of the WSF algorithm with visual assessments DOI : 10.1111/j.1478-4408.2012.00372.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15114 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13933	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Study on analytical methods for quantifying the non-adsorbed reactive dye forms in an exhausted dyebath / Younes Chemchame in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 169-175 Titre : Study on analytical methods for quantifying the non-adsorbed reactive dye forms in an exhausted dyebath Type de document : texte imprimé Auteurs : Younes Chemchame, Auteur ; Igor V. Popikov, Auteur ; Mohammed Soufiaoui, Auteur Année de publication : 2012 Article en page(s) : p. 169-175 Note générale : Errata (voir URL) - Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie) Bains de teinture -- Analyse Chromatographie en phase liquide à hautes performances Colorants -- Adsorption 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). Fibres cellulosiques Spectroscopie de réflectance Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Reported herein are the results of an analysis of the compatibility of three methods for quantifying the non-adsorbed forms of reactive dyes, in an exhausted dyebath, of the type monochlorotriazine/β-sulphatoethylsulphone used in dyeing cellulosic fibres (cotton). The first method is based on spectrophotometric analysis and involves measuring the absorbance of the residual dyebath (after the dyeing process), the second is based on colorimetric analysis and involves measuring the reflectance of the dyed fabric and the third is based on high-performance liquid chromatography. The purpose of the latter is to identify and quantify the non-adsorbed dye forms in the residual dyebath. The calculated exhaustion values unequivocally prove the reliability and compatibility of these methods. Note de contenu : - EXPERIMENTAL : Materials - Wash-off - Absorbance measurement (method I) - Reflectance measurement (method II) - Preparation of standard dyebaths - Calibration of residual dyebaths - Conditions for HPLC studies - Conditions of application - RESULTS AND DISCUSSION : Analysis of CI reactive red 195 - Analysis of CI reactive yellow 145 - Analysis of CI reactive blue 221 - Application DOI : 10.1111/j.1478-4408.2012.00355.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15115 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13933	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Influence of grafting with acrylic acid on the dyeing properties of polyamide 6.6 fibres / Chahira Makhlouf in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 176-183 Titre : Influence of grafting with acrylic acid on the dyeing properties of polyamide 6.6 fibres Type de document : texte imprimé Auteurs : Chahira Makhlouf, Auteur ; Néji Ladhari, Auteur ; Sadok Roudesli, Auteur ; Faouzi Sakly, Auteur Année de publication : 2012 Article en page(s) : p. 176-183 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants cationiques Copolymères greffés Copolymérisation Polyacryliques Polyamide 66 Teinture -- Fibres textiles synthétiques Index. décimale : 677 Textiles Résumé : Polyamide 6.6 fibres were modified for the improvement of dyeing affinity using a graft copolymerisation method. These fibres were grafted with acrylic acid as monomer. The influence of the chemical modification of polyamide 6.6 fibres on the dyeing properties was investigated using a cationic dye (Red Astrazon 5BL). It was shown that the dye uptake of the modified fibres was greater than that of the unmodified fibres. The kinetic study of the cationic dye used at various grafting percentages showed an improvement of the dye build-up rate, such as its exhaustion. In addition, an increase in the adsorption of the dye quantity fixed on the surface layer of the fibre made up of the grafted molecules was announced. Colour fastness to washing was improved with the grafting percentage. The modelling of the adsorption isotherms using Langmuir, Freundlich and Jossen relations allows the determination of isotherm constants. The results obtained from this modelling study show the existence of several models corresponding to various percentages of grafting. Note de contenu : - EXPERIMENTAL : Materials - Grafting procedure - Determination of grafting percentage - Surface topography - Dyeing - Analysis dyeing - Washing fastness - RESULTS AND DISCUSSION : Surface topography analysis - Dyeing - Washing fastness - Dye adsorption of cationic onto polyamide 6.6 fibres - Adsorption isotherms DOI : 10.1111/j.1478-4408.2012.00356.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15117 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13933	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Dye aggregation and interaction of dyes with a water-soluble polymer in ink-jet ink for textiles / Ju-Young Park in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 184-191 Titre : Dye aggregation and interaction of dyes with a water-soluble polymer in ink-jet ink for textiles Type de document : texte imprimé Auteurs : Ju-Young Park, Auteur ; Yuichi Hirata, Auteur ; Kunihiro Hamada, Auteur Année de publication : 2012 Article en page(s) : p. 184-191 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants Encre jet d'encre Impression jet d'encre Polymères hydrosolubles Polyvinylpyrrolidone Précipitation (chimie) Sulfonates Teinture -- Fibres textiles Index. décimale : 677 Textiles Résumé : Detailed understanding of the interaction between dyes and additives and the aggregation behaviour of the dye molecules in aqueous solutions is required to develop ink-jet ink for textiles. In the present study, the aggregation behaviour of three acid dyes (CI Acid Red 88, CI Acid Red 13 and CI Acid Red 27) containing different number of sulphonate groups in aqueous solutions was investigated by means of visible absorption spectroscopy. As a result, the higher the solubility of the dyes in water (the larger the number of sulphonate groups in the dyes), the lower are the aggregation constants of the dyes. For all the dyes, the aggregation constants decreased with increasing temperature, indicating the exothermic process of the dye aggregation. The thermodynamic process for CI Acid Red 88 with one sulphonate group is less enthalpic and more entropic than that for CI Acid Red 13, which contains two sulphonate groups. CI Acid Red 27, which includes three sulphonate groups, hardly forms any aggregates. To elucidate the effects of the polymer additive, the binding constants of the dyes with the water-soluble polymer, poly(vinylpyrrolidone) and the aggregation constants of the dyes in aqueous polymer solutions were also estimated. In addition, the binding constants were influenced by the number of sulphonate groups in the acid dyes: the larger number of sulphonate groups diminished the binding constants. The aggregation constants in the presence of poly(vinylpyrrolidone) were smaller than those in its absence at every temperature for all dyes. This suggests that poly(vinylpyrrolidone) has disaggregation effects. Furthermore, poly(vinylpyrrolidone) makes the aggregation process less enthalpic with a greater entropic change. Thus, the aggregation process of the dyes in the polymer solutions is thermodynamically different from that in water, reflecting the interactions between the dyes and the polymer. Note de contenu : - EXPERIMENTAL : Materials - Visible absorption spectrum measurements - RESULTS AND DISCUSSION : Aggregation of dyes in aqueous solutions - Interaction between dyes and PVP - Aggregation of dyes in the polymer solutions DOI : 10.1111/j.1478-4408.2012.00370.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15118 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13933	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Studies on quinoline type dyes and their characterisation studies on acrylic fabric / Pik-Ling Lam in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 192-198 Titre : Studies on quinoline type dyes and their characterisation studies on acrylic fabric Type de document : texte imprimé Auteurs : Pik-Ling Lam, Auteur ; Chi-Wai Kan, Auteur ; Marcus Chun-Wah Yuen, Auteur ; Siu-Yung Cheung, Auteur ; Roberto Gambari, Auteur ; Kim-Hung Lam, Auteur ; Johnny Cheuk-On Tang, Auteur ; Chung-Hin Chui, Auteur Année de publication : 2012 Article en page(s) : p. 192-198 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Colorants Fibres acryliques Fluorescence Quinoléine Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : Nitrogen heterocyclic fluorescent compounds and their possible dyeing pathway on acrylic fabrics was investigated. Their chemical spectral properties, including fluorescence and ultraviolet–visibility, were evaluated in this work. The colour fastness properties of these dyes attributable to light reflection and washing were examined. The CIE L*, a* and b* values after the dyeing process were studied and the colour fastness properties were also determined. Two quinoline derivatives showed stronger fluorescence properties and were also demonstrated to be non-cytotoxic towards human HaCaT skin keratinocytes at a reasonable dose. These results led to speculation that these two compounds could be further used as dyes in various textile applications. Note de contenu : - EXPERIMENTAL : Synthesis of alkoxy-substituted quinaldine - Dyeing - Optical property of fluorescent dyes - Visual effect of dyed acrylic samples - Reflectance and colour yield measurement - Evaluation of colour fastness to washing and light - In vitro toxicology test - RESULTS AND DISCUSSION : UV absorption spectra of alkoxy-substituted quinaldine - Fluorescent property of quinolone dye compounds - Visual performance of dyed acrylic fabrics - Reflectance of the dyed acrylic fabrics - Colour yield of the dyed acrylic fabrics - Colour fastness to washing - Colour fastness to light - Cytoxicity test of compounds 1 and 3 on human cells DOI : 10.1111/j.1478-4408.2012.00363.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15120 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13933	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Textile colour matching using linear and exponential weighted principal component analysis in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 199-203 Titre : Textile colour matching using linear and exponential weighted principal component analysis Type de document : texte imprimé Année de publication : 2012 Article en page(s) : p. 199-203 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse en composantes principales L'analyse en composantes principales (ACP ou PCA en anglais pour principal component analysis), ou, selon le domaine d'application, transformation de Karhunen–Loève (KLT) ou transformation de Hotelling, est une méthode de la famille de l'analyse des données et plus généralement de la statistique multivariée, qui consiste à transformer des variables liées entre elles (dites « corrélées » en statistique) en nouvelles variables décorrélées les unes des autres. Ces nouvelles variables sont nommées « composantes principales » ou axes principaux. Elle permet au statisticien de résumer l'information en réduisant le nombre de variables. Il s'agit d'une approche à la fois géométrique (les variables étant représentées dans un nouvel espace, selon des directions d'inertie maximale) et statistique (la recherche portant sur des axes indépendants expliquant au mieux la variabilité — la variance — des données). Lorsqu'on veut compresser un ensemble de N N variables aléatoires, les n n premiers axes de l'analyse en composantes principales sont un meilleur choix, du point de vue de l'inertie ou de la variance. L'outil mathématique est appliqué dans d'autres domaines que les statistiques et est parfois appelé décomposition orthogonale aux valeurs propres ou POD (anglais : proper orthogonal decomposition). (Wikipedia) Colorants Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this work, linear and exponential weighted principal component analysis techniques based on spectral similarity were employed for the prediction of dye concentration in coloured fabrics, which had been dyed with three component dye mixtures. The matching strategy was based on the equalisation of the first three principal component coordinates of the weighted reflectance curves of the predicted and target sample in a dynamic 3D eigenvector space. The performance of the proposed algorithm was evaluated by the root mean square differences of the reflectance curves and the relative error of the concentration prediction, as well as the metamerism index. The obtained results indicated that the developed exponential weighted principal component analysis method is more accurate than the spectrophotometric method and the simple principal component analysis matching strategy. Note de contenu : - EXPERIMENTAL : Colour matching using weighted PCA - RESULTS AND DISCUSSION : The effect of the spectral overlapping - Comparison among different matching methods - Signal to noise analysis for matching methods based on PCA DOI : 10.1111/j.1478-4408.2012.00362.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15121 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13933	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Dyeing properties of novel electrolyte-free reactive dyes on cotton fibre / Zheng Chunllin in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 204-207 Titre : Dyeing properties of novel electrolyte-free reactive dyes on cotton fibre Type de document : texte imprimé Auteurs : Zheng Chunllin, Auteur ; Ailin Yuan, Auteur ; Haibo Wang, Auteur ; Sun Jie, Auteur Année de publication : 2012 Article en page(s) : p. 204-207 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ammoniums quaternaires Carbonate de sodium Le carbonate de sodium est un composé chimique ayant pour formule Na2CO3. Il s'agit d'un sel de sodium de l'acide carbonique. Dans le langage courant, on parle aussi de soude ou de cristaux de soude, à cause de son contenu en sodium et de sa forme habituellement cristalline. Par contre, il ne faut pas confondre le carbonate de sodium avec la soude caustique ou encore avec le bicarbonate de soude. Colorants réactifs 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). Epoxydes Sels d'ammonium Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : A series of electrolyte-free reactive dyes containing two quaternary ammonium salt groups as soluble moieties and one epoxy structure as the reactive group have been synthesised. The structures of the synthesised dyes were confirmed by Fourier Transform–infrared, proton nuclear magnetic resonance and elemental analysis, and their dyeing properties on cotton were studied using an electrolyte-free dyeing process. The results indicate that electrolyte-free reactive dyes with these structures give a high exhaustion rate, a high fixation rate and good build-up properties on cotton. Fastness properties were, in general, also very good. The optimal dyeing process of these electrolyte-free dyes for cotton fibre was 60 °C with 20 g/l sodium carbonate. Note de contenu : - EXPERIMENTAL : Materials - Measurements - Synthesis of electrolyte-free reactive dyes - Dyeing procedure - Measurement of dye exhaustion and fixation - Fastness testing - Build-up property testing - RESULTS AND DISCUSSION : Tyeing conditions - Dyeing of cotton - Build-up properties - Fastness properties DOI : 10.1111/j.1478-4408.2012.00364.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15122 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13933	-	Périodique	Bibliothèque principale	Documentaires	Disponible

The use of Jatobá bark for removal of cationic dyes / Carla A. Demarchi in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 208-217 Titre : The use of Jatobá bark for removal of cationic dyes Type de document : texte imprimé Auteurs : Carla A. Demarchi, Auteur ; ALine Debrassi, Auteur ; Clóvis Rodrigues, Auteur Année de publication : 2012 Article en page(s) : p. 208-217 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Adsorption Colorants cationiques Eaux usées -- Epuration Ecorces Jatoba et constituants Le jatoba est un immense arbre de la canopée, s'élevant à plus de 30 mètres de haut dans la forêt amazonienne. Le tronc est cylindrique. Ses feuilles alternes d'un vert éclatant sont composées de deux folioles asymétriques. Ses fleurs blanches et odorantes sont rassemblées en grappe. La floraison a lieu entre avril et mai. Les fruits sont des gousses très dures, longues et arrondies aux extrémités, de couleur café foncé, de 9 à 14 cm de long et renferment une à huit graines cachées dans une pulpe farineuse, jaunâtre, sucrée à l’odeur et à la saveur musquées. Ces fruits sont considérés comme étant comestibles bien que pas très bon - d'ailleurs un des noms commun du Jatoba est le stinking toe ou « pieds qui puent »… Les Hymenaea, dont le jatoba, produisent de la résine. On a d'ailleurs retrouvé de l'ambre de Jatoba, ce qui prouve que leur existence remonte à bien longtemps. Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this work, the application of Jatobá bark (the waste product of medicinal plant processing) in removal of the cationic dyes Methylene Blue, Crystal Violet and Rhodamine B from aqueous solution was studied in a batch system. The effect of contact time, pH and temperature on dye removal was investigated. An increase in pH from 2 to 10 was accompanied by an increase in the amount of dye adsorbed. The equilibrium sorption data fitted to the Langmuir, Freundlich and Langmuir–Freundlich equations were investigated. The Langmuir–Freundlich isotherm exhibited the best fit with the experimental data and the maximum adsorption capacities at room temperature being 211.5, 89.5 and 69.4 for Rhodamine B, Methylene Blue and Crystal Violet, respectively. The kinetic sorption was evaluated by the pseudo-first-order, pseudo-second-order and intraparticle diffusion models. It was observed that sorption follows the pseudo-second-order kinetic model. The thermodynamic parameters for the sorption process were also determined. The spontaneous and endothermic nature of adsorption was obtained based on the negative value of free energy (ΔG) and the positive value of enthalpy (ΔH). The results indicate that Jatobá bark could be used as a low-cost material for the removal of cationic dyes from wastewater. Note de contenu : - EXPERIMENTAL : Material - Methods - RESULTS AND DISCUSSION : Adsorbent characteristics - Effect of pH solution on dye adsorption - Effect of dosage - Adsorption isotherm - Adsorption kinetics - Thermodynamic and kinetic parameters - Simulated and real wastewater application DOI : 10.1111/j.1478-4408.2012.00365.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15123 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13933	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Synthesis of a novel fluorescent coloured copolymer based on 4-butylthio-1,8-naphthalimide / Bahareh Safabakhsh in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 218-222 Titre : Synthesis of a novel fluorescent coloured copolymer based on 4-butylthio-1,8-naphthalimide Type de document : texte imprimé Auteurs : Bahareh Safabakhsh, Auteur ; Alireza Khosravi, Auteur ; Kamaladin Gharanjig, Auteur ; Elaheh Kowsari, Auteur ; Manouchehr Khorassani, Auteur ; Sina Tafaghodi, Auteur Année de publication : 2012 Article en page(s) : p. 218-222 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Synthèse Copolymères -- Synthèse Fluorescence Fluoropolymères Méthacrylate de méthyle Solvatochromisme Index. décimale : 667.3 Teinture et impression des tissus Résumé : A novel fluorescent coloured copolymer based on naphthalimide was prepared. Acenaphthene was brominated and oxidised to prepare 4-bromo-1,8-naphthalic anhydride and further reacted with butanethiol, 2-aminoethanol and acryloyl chloride, in order to obtain a new polymerisable fluorescent dye. The synthesised dyes were characterised by differential scanning calorimetry, absorption spectroscopy (Fourier Transform–infrared, proton and carbon nuclear magnetic resonance, ultraviolet–visible spectroscopy) and fluorimetry. Molar extinction coefficients and wavelength maxima were obtained by examining the dye solution in ethanol. The solvatochromic effects of the prepared dyes have also been investigated. Finally, the dye was copolymerised with methyl methacrylate and an intrinsically coloured copolymer was obtained. The photophysical characteristics of the obtained copolymer have also been considered. It is assumed that 99% of the copolymerised dye is chemically bonded to polymer chains. The fluorescent characteristics of the copolymer in the solid state were determined by fluorometer and it was found that it has relatively high fluorescent intensity. The physical properties of the synthesised copolymer have been evaluated by differential scanning calorimetry and gel permeation chromatography. Note de contenu : - EXPERIMENTAL : Materials - Instrumentation - Synthesis of intermediates, monomer and copolymer - RESULTS AND DISCUSSION : Synthesis of polymerisable dye - Spectrophotometric properties of dyes - Copolymerisation of the synthesised dye with MMA DOI : 10.1111/j.1478-4408.2012.00366.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15124 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13933	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Dyeing of woven polyester fabric with curcumin : effect of dye concentrations and surface pre-activation using air atmospheric plasma and ultraviolet excimer treatment in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 223-229 Titre : Dyeing of woven polyester fabric with curcumin : effect of dye concentrations and surface pre-activation using air atmospheric plasma and ultraviolet excimer treatment Type de document : texte imprimé Année de publication : 2012 Article en page(s) : p. 223-229 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Curcumine Lampes à excimère Plasma à pression atmosphérique Un plasma à pression atmosphérique (ou plasma à PA ou plasma froid) est le nom donné à une catégorie spéciale de plasma pour lequel la pression approche celle de l’atmosphère. Le plasma à pression atmosphérique marque une nette différence avec le plasma basse et haute pression. En effet, contrairement à ces derniers aucune enceinte de traitement n'est nécessaire. Ce type de plasma peut donc être utilisé directement sur ligne de production, évitant ainsi l'utilisation de vide qui est extrêmement onéreuse. Polyesters Teinture -- Fibres textiles synthétiques Tissés Index. décimale : 667.3 Teinture et impression des tissus Résumé : Dyeing of polyester fabric with curcumin was studied at 90 and 130 °C without and with a prior surface activation of polyester fabric using two different ecotechnologies: air atmospheric plasma treatment and ultraviolet excimer lamp at 172 nm. Without surface activation, dyeing with curcumin followed classical disperse dye behaviour, with higher dye uptake at 130 °C than at 90 °C, and saturation was readily reached at 2% dye owf at 130 °C with a colour yield of 22. Surface-sorbed curcumin molecules extracted with ethanol seemed to increase the colour yield values at 90 °C dyeing, while at 130 °C they decreased the colour yield values. When dyeing was carried out after a prior surface activation of the polyester fabrics, increased colour yield was observed at both dyeing temperatures for the ultraviolet excimer lamp only (with colour yield increasing from 2 to 10 at 90 °C and from 22 to 28 at 130 °C for a 2% dye owf). Indeed, both surface activation methods yielded hydrophilic species at the polyester fabric fibre surface, which were confirmed by water contact angle, X-ray photoelectron spectroscopy measurements and atomic force microscopy. However, the surface of the polyester fabric activated using plasma lost all of its hydrophilic species, reaching the water contact angle of untreated polyester when subjected to the dyeing conditions. The excimer treatment yields hydrophilic species that are more resistant to high temperature and pressure dyeing. Note de contenu : - EXPERIMENTAL : Material - Dyeing with curcumin and characterisation of curcumin-dyed PET fabrics - PET fabric surface activation - PET fabric surface characterisation - RESULTS AND DISCUSSION : Dyeing of PEt fabric with curcumin without surface activation - Dyeing of PET fabric with curcumin with surface activation using UV excimer treatment - Dyeing of PET fabric with curcumin with surface activation using air atmospheric plasma treatment - Characterisation of UV excimer and plasma-activated PET woven fabrics DOI : 10.1111/j.1478-4408.2012.00367.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15125 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13933	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Sulphite-based resist styles for digital printing cotton fabrics / David M. Lewis in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 230-35 Titre : Sulphite-based resist styles for digital printing cotton fabrics Type de document : texte imprimé Auteurs : David M. Lewis, Auteur ; Peter J. Broadbent, Auteur Année de publication : 2012 Article en page(s) : p. 230-35 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants réactifs 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). Impression sur étoffes Inhibiteurs (chimie) sulfite de sodium Index. décimale : 667.3 Teinture et impression des tissus Résumé : Discharge printing provides a method of producing either a white or coloured image on a solid ground fabric; unfortunately, the shade range from this process is limited. An alternative approach to discharge printing is resist printing, which provides prints that are almost indistinguishable from those achieved by the discharge printing process and has the advantage of offering a wider shade range. In resist printing, the resist agent prevents fixation of the background colour by chemical (resist agent inhibits dye fixation) or physical (resist agent inhibits dye absorption) processes and so yields a white print. Printing is carried out on grounds that have been pad-dry ‘dyed’ with selected reactive dyes; the dyes must not fix during this process otherwise white grounds are not achievable – subsequently fixation is achieved by steaming after digitally printing the resist agent. In this paper, the resist agent studied is sodium sulphite, which selectively blocks reactive groups in reactive dyes – the ground shade reactive dye must be deactivated in this reaction to produce the resist effect. A coloured print may be achieved by incorporating a suitable reactive dye, of a different class to that used in the ground shade, which is not deactivated by the resist agent, in the resist ink. Note de contenu : - EXPERIMENTAL : Materials - Methods - RESULTS AND DISCUSSION : Ink preparation - White resist ink formulation - Illuminated resist ink formulation - Illuminating inks for two-step illuminated resist printing DOI : 10.1111/j.1478-4408.2012.00371.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15126 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13933	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Novel water-soluble metallophthalocyanines supported on cotton fabric / Özgür Yildirim in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 236-243 Titre : Novel water-soluble metallophthalocyanines supported on cotton fabric Type de document : texte imprimé Auteurs : Özgür Yildirim, Auteur ; AltuÄŸ Sevim, Auteur ; Ahmet Gül, Auteur Année de publication : 2012 Article en page(s) : p. 236-243 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ammoniac 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). Hydroxyde de sodium L'hydroxyde de sodium, appelé également soude caustique7, est un corps chimique composé minéral de formule chimique NaOH, qui est à température ambiante un solide ionique. Fusible vers 318 °C, il se présente généralement sous forme de pastilles, de paillettes ou de billes blanches ou d'aspect translucide, corrosives et très hygroscopiques. Il est très soluble dans l'eau et légèrement soluble dans l'éthanol. La solution d'hydroxyde de sodium, souvent appelée soude, est une solution aqueuse transparente. Concentrée, elle est corrosive et souvent appelée lessive de soude. Les propriétés chimiques de l'hydroxyde de sodium sont surtout liées à l'ion hydroxyde HO- qui est une base forte. En outre, l'hydroxyde de sodium réagit avec le dioxyde de carbone (CO2) de l'air et se carbonate. La solubilité de la soude caustique dans l'eau augmente avec la température, à pression constante ou ambiante. Métallophtalocyanine Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, two novel phthalonitrile derivatives were firstly prepared starting from 4-nitrophthalonitrile: substitution of the nitro group with 3-mercaptopropionic acid and 4-mercaptobenzoic acid gave two precursors, namely, 4-(carboxyethylsulphanyl) phthalonitrile and 4-(carboxyphenylsulphanyl)phthalonitrile. Zinc(ii), copper(ii) and cobalt(ii) metallophthalocyanines bearing four carboxylic acid groups on the periphery were prepared by cyclotetramerisation of the new precursors in the presence of the corresponding divalent metal salts. The new compounds were characterised by elemental analyses, infrared, ultraviolet–visible, mass and proton nuclear magnetic resonance techniques. All these newly synthesised water-soluble metallophthalocyanine derivatives were supported on cationic cotton fabrics in the presence of ammonia solution and sodium hydroxide and the dyeing effectiveness, levelness and fastness of these novel dyed fabrics were investigated. These novel dyed fabrics are considered to be useful in the textile industry and also in optical and catalytic applications, especially for air-purifying materials in air conditioners. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of phthalocyanine derivatives (1a-c, 2a-c) - Preparation of cationic cotton fabric - Dyeing of cationic cotton fabric with metallophthalocyanines - Investigation of dyeing, water, washing rubbing and perspiration fastness of metallophthalocyanines with and without fixing agent - RESULTS AND DISCUSSION : Synthesis and characterisation of metallophthalocyanines - Results of dyeing and fastness - DOI : 10.1111/j.1478-4408.2012.00368.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15127 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13933	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Adsorption characteristics of ionic and nonionic surfactants on hydrophobic pigment in aqueous medium / Hikmet Sis in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 244-249 Titre : Adsorption characteristics of ionic and nonionic surfactants on hydrophobic pigment in aqueous medium Type de document : texte imprimé Auteurs : Hikmet Sis, Auteur ; Mustafa Birinci, Auteur Année de publication : 2012 Article en page(s) : p. 244-249 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Colorants -- Adsorption Hydrophobie Nonylphenol éthoxylates Oléate de sodium Phtalocyanine de cuivre Potentiel zeta Surfactants Index. décimale : 667.3 Teinture et impression des tissus Résumé : The current study is based on the investigation of the adsorption properties of ionic and nonionic surfactants on an organic hydrophobic pigment powder, namely, β-copper phthalocyanine, in aqueous medium. The nonionic surfactants, selected systematically to represent varying degrees of ethoxylation, are nonylphenol ethoxylates, whereas the ionic surfactant is sodium oleate, a carboxylate-type anionic reagent. The adsorption of surfactants was assessed qualitatively by surface analysis of powders, before and after the adsorption of the surfactants. The experimental results were explained by the structural and other properties of the surfactants and the surface properties of the pigment. The specific adsorption of surfactants on pigments was verified by zeta potential measurements, as they altered the zeta potential values to a great extent. Nonionic surfactants decreased the absolute value of the zeta potential of the powder; whereas anionic surfactant sodium oleate shifted the zeta potential to more negative values. On the one hand, Fourier Transform–infrared and X-ray diffraction examinations of the pigments did not show any noticeable evidence for surfactant untreated or treated copper phthalocyanine. On the other hand, thermal analysis (both thermogravimetric and differential thermal analysis) showed clear evidence of the surfactants on both pigments, as substantial changes in thermogravimetric curves were assessed. Note de contenu : - EXPERIMENTAL : Materials - Zeta potential measurements - RESULTS AND DISCUSSION : Zeta potential of copper phthalocyanine blue pigment - Interactions of surfactants and pigments DOI : 10.1111/j.1478-4408.2012.00369.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15128 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
13933	-	Périodique	Bibliothèque principale	Documentaires	Disponible