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Illuminant metamerism potentiality of metameric pairs / Seyed Hossein Amirshahi in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 5 (2012) . - p. 341-349 Titre : Illuminant metamerism potentiality of metameric pairs Type de document : texte imprimé Auteurs : Seyed Hossein Amirshahi, Auteur ; Peyvandi Shahram, Auteur ; Boris Sluban, Auteur Année de publication : 2012 Article en page(s) : p. 341-349 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Métamérisme vision des couleurs Index. décimale : 667.3 Teinture et impression des tissus Résumé : Indices for describing the degree of metamerism are based on either the deviation of the spectra of a metameric pair or the colour difference of the pair under test conditions. The magnitude of illuminant metamerism is commonly evaluated by measuring the colour difference under the test illuminant. The calculated colour differences absolutely vary with the selected test illuminants, so the measured (special) index of metamerism could be considered as a test-illuminant-dependent value. The spectral-based indices of metamerism act as a single-number value, but most of them are criticised for their poor correlation with visual assessment. In this paper, a general metric is developed for evaluating the upper limit of the degree of illuminant metamerism. The suggested approach combines the advantages of general and special indices, avoiding their drawbacks at the same time. The performance of the formula is analysed in a number of numerical experiments, as well as by practical testing. Note de contenu : - Definition of Illuminant Metamerisme Potentiality - The magnitude of Colorimetric Shift - The magnitude of Colour Difference - Illuminant Metamerism Potentiality of a Metameric Pair - The reliability of Metamerisme Potentiality - Numerical Experiment - Practical experiment - Printer Characterisation - Sample preparation - Reliability of Illuminant Metamerism Potentiality of a Parameric Pair DOI : 10.1111/j.1478-4408.2012.00386.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00386.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15801 [article]

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Naphthoquinone colorants from Arnebia nobilis Rech.f / Anjali Arora in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 5 (2012) . - p. 350-355 Titre : Naphthoquinone colorants from Arnebia nobilis Rech.f Type de document : texte imprimé Auteurs : Anjali Arora, Auteur ; Deepti Gupta, Auteur ; Deepali Rastogi, Auteur ; Mohan Gulrajani, Auteur Année de publication : 2012 Article en page(s) : p. 350-355 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale Chromatographie Colorants végétaux Extraction (chimie) Naphtoquinone Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : The roots of Arnebia nobilis have traditionally been used as a colorant in food and cosmetic preparations. The deep red colour obtained is attributed to the presence of shikonin and its isomer alkannin and their derivatives. In this study, five colouring components were extracted from the roots of A. nobilis. These were separated and purified chromatographically and characterised using various spectrophotometric techniques. Three of the five components were identified. The major component was found to be alkannin ?, ?-dimethylacrylate [5,8-dihydroxy-2-(1?-?, ?-dimethylacryloxy-4?-methylpent-3?-enyl)-1,4-naphthoquinone], accounting for nearly 25% of the total colouring matter. Alkannin acetate [2-(1?-acetoxy-4?-methylpent-3?-enyl)-5,8-dihydroxy-1,4-naphthoquinone] made up ca. 8% and shikonin [(5,8-dihydroxy-4?-methylpent-3?-enyl)-1,4-naphthoquinone] contributed ca. 6% of the colouring matter. Polyester was dyed pink, nylon was dyed blue and all other substrates acquired a purple hue under similar dyeing conditions. The dyed fabrics showed excellent wash, rub and perspiration fastness; however, light fastness was found to be poor. Note de contenu : - EXPERIMENTAL - Materials - Methods : extraction of colorants - Chromatographic separation of colorants - Fabric preparation - Dyeing studies - Determination of depth of shade - Fastness tests - RESULTS AND DISCUSSION - Chromatographic analysis (TLC and column chromatography - Optimisation of detection wavelength for HPLC - HPLC analysis) - Spectroscopic analysis - Dyeing studies (colour fastness properties) DOI : 10.1111/j.1478-4408.2012.00383.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00383.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15802 [article]

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Effect of atmospheric pressure plasma treatment on the desizing and subsequent colour fading process of cotton denim fabric / C. W. Kan in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 5 (2012) . - p. 356-363 Titre : Effect of atmospheric pressure plasma treatment on the desizing and subsequent colour fading process of cotton denim fabric Type de document : texte imprimé Auteurs : C. W. Kan, Auteur ; C. W. M. Yuen, Auteur Année de publication : 2012 Article en page(s) : p. 356-363 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Décoloration Désencollage Jeans 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. Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this article, the performance of atmospheric pressure plasma treatment in the desizing of grey cotton denim fabric followed by an enzymatic colour fading process was studied. Four atmospheric pressure plasma processing parameters, namely, treatment time, ignition power, reactive gas (oxygen) concentration and jet distance were considered for desizing. In order to investigate the optimum conditions (based on weight change) for atmospheric pressure plasma treatment, an orthogonal array testing strategy was used. The optimum conditions for atmospheric pressure plasma treatment in this study were: treatment time, 5 s/mm; ignition power, 160 W; oxygen concentration, 1%; and jet distance, 3 mm. The level of importance of atmospheric pressure plasma processing parameters based on the orthogonal array testing strategy analysis was in the order: jet distance > ignition power > oxygen concentration > treatment time, and the effect of each processing factor is also discussed. In addition, the desizing effect induced by atmospheric pressure plasma treatment was compared with conventional enzyme desizing treatment. The resultant performance properties were also compared. After conducting desizing with atmospheric pressure plasma treatment, the cotton denim fabric was subjected to an enzymatic colour fading process. The colour fading effect was found to be more significant when compared with the conventional enzymatic colour fading process. Note de contenu : - EXPERIMENTAL : Denim fabric - Atmospheric plasma treatment on denim fabric - Enzyme desizing - Enzymatic colour fading process (cellulase treatment) - Measurement of weight change - Performance properties - Measurement of colour - Surface morphology - X-ray photoelectron spectroscopy analysis - Contact angle and wetting time measurement - RESULTS AND DISCUSSIONS : Optimum conditions for atmospheric pressure plasma treatment - Effect of jet distance - Effect of ignition power - Effect of oxygen concentration - Effect of treatment time - Verifying the optimum conditions - Surface morphology - X-ray photoelectron spectroscopy analysis - Contact angle and wetting time measurement - Performance properties - K/S value - CIE colour coordinates DOI : 10.1111/j.1478-4408.2012.00388.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00388.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15803 [article]

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Investigation on colour, fastness properties and HPLC-DAD analysis of silk fibres dyed with Rubia tinctorium L. and Quercus ithaburensis Decaisne / Ozan Deveoglu in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 5 (2012) . - p. 364-370 Titre : Investigation on colour, fastness properties and HPLC-DAD analysis of silk fibres dyed with Rubia tinctorium L. and Quercus ithaburensis Decaisne Type de document : texte imprimé Auteurs : Ozan Deveoglu, Auteur ; Burcu Y. Sahinbaskan, Auteur ; Emine Torgan, Auteur ; Recep Karadag, Auteur Année de publication : 2012 Article en page(s) : p. 364-370 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chromatographie en phase liquide à hautes performances Colorants végétaux Soie et constituants Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Silk fabric samples were dyed according to the various procedures using madder (Rubia tinctorium L.) and walloon oak (Quercus ithaburensis Decaisne) extracts. The colour coordinates, K/S, as well as wash, light, rub and perspiration fastness values were determined. A reversed-phase high-performance liquid chromatography with diode-array detection was utilised for the identification of the components of dyes present in the dyed fabrics and in the plant extracts. Note de contenu : - EXPERIMENTAL : Materials - Dye plants and chemicals - Procedures (mordanting procedure - Dyeing procedures) - Colour measurements - Fastness determination - HPLC method - Extraction procedure for HPLC analysis - RESULTS AND DISCUSSION : HPLC analysis - Effects of different dyeing procedures on the CIE L* a* b* values - Fastness properties DOI : 10.1111/j.1478-4408.2012.00389.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00389.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15804 [article]

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The synthesis, characterisation and molecular structure of a new hetarylazoindole dye studied by X-ray diffraction, spectral analysis and density functional theory calculation / Ebru Aktan in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 5 (2012) . - p. 371-377 Titre : The synthesis, characterisation and molecular structure of a new hetarylazoindole dye studied by X-ray diffraction, spectral analysis and density functional theory calculation Type de document : texte imprimé Auteurs : Ebru Aktan, Auteur ; Zeynel Seferoglu, Auteur ; Tuncer Hökelek, Auteur ; Ertan Sahin, Auteur Année de publication : 2012 Article en page(s) : p. 371-377 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale Caractérisation Colorants -- Synthèse Diffractométrie de rayons X Fonctionnelles densité La théorie de la fonctionnelle de la densité (pour Density Functional Theory, sous-entendu électronique : DFT) constitue au début du XXIe siècle l'une des méthodes les plus utilisées dans les calculs quantiques de la structure électronique de la matière (atomes, molécules, solides) aussi bien en physique de la matière condensée qu'en chimie quantique. La DFT trouve ses origines dans le modèle développé par Llewellyn Thomas et Enrico Fermi à la fin des années 1920. Structure moléculaire Index. décimale : 667.3 Teinture et impression des tissus Résumé : 1,2-Dimethyl-3-(5-methylisoxazol-3-yldiazenyl)-1H-indole was obtained by coupling 3-amino-5-methylisoxazole with diazotised 1,2-dimethylindole. It was characterised by proton and carbon nuclear magentic resonance, ultraviolet–visible, infrared and Raman spectra, and the X-ray single crystal diffraction method. On the theoretical side, the molecular geometry, chemical shifts and the fundamental vibrational frequencies were evaluated using density functional theory. Time-dependent density functional theory was used to evaluate the electronic excitation spectra. In addition, the scaled quantum mechanical approach was used to study the total energy distributions of the vibrational modes of the molecule. The results showed that the general agreement between experimental and calculated geometric parameters, chemical shifts and ?max values are good. Excellent agreement was found between the calculated and experimental vibrational frequencies. Note de contenu : - EXPERIMENTAL : General - Preparation of 1,2-dimethyl-3(5-methylisoxazol-3-yldiazenyl)-1H-indole - Computational study - Crystallography - RESULTS AND DISCUSSION : Crystal structure analysis - Comparison of computational and experimental results DOI : 10.1111/j.1478-4408.2012.00390.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00390.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15805 [article]

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Dyes derived from 1,4-naphthoquinone as initiators for radical and cationic photopolymerisation / Agnieszka Szymczak in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 5 (2012) . - p. 378-386 Titre : Dyes derived from 1,4-naphthoquinone as initiators for radical and cationic photopolymerisation Type de document : texte imprimé Auteurs : Agnieszka Szymczak, Auteur ; Radoslaw Podsiadly, Auteur ; Karolina Bazela, Auteur ; Jolanta Sokolowska, Auteur Année de publication : 2012 Article en page(s) : p. 378-386 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amorceurs (chimie) Colorants -- Synthèse Naphtoquinone Photochimie Photoréticulation Polyaddition Spectrométrie de masse Spectroscopie de la résonance magnétique nucléaire Index. décimale : 667.3 Teinture et impression des tissus Résumé : Several 2-phenylamino-1,4-naphthoquinone-based dyes and two related benzo[2,3-b]–phenazines were synthesised and characterised by proton nuclear magnetic resonance spectroscopy and electron ionisation mass spectrometry. The electrochemical and spectral properties of these compounds were investigated. The synthesised dyes were found to be capable photosensitisers for radical (reducible/oxidisable) and cationic polymerisations, respectively. In radical polymerization, better results in the oxidisable process were achieved. Note de contenu : - EXPERIMENTAL : General - Synthesis of 2-(4-chloroanilino)-3-chloro-1,4-naphthoquinone Id - Synthesis of 2-(4-chloroanilino)-3-bromo-1,4-naphthoquinone IId - Synthesis of 6,11-dihydro-benzo[2,3-b]phenazine-6,11-dione IIIa - Photochemical DOI : 10.1111/j.1478-4408.2012.00391.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00391.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15806 [article]

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Ozonation of the reactive dye intermediate 2-naphthylamine 3,6,8-trisulphonic acid (K-Acid) : kinetic assessment, ozonation products and ecotoxicity / Idil Arslan-Alaton in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 5 (2012) . - p. 387-394 Titre : Ozonation of the reactive dye intermediate 2-naphthylamine 3,6,8-trisulphonic acid (K-Acid) : kinetic assessment, ozonation products and ecotoxicity Type de document : texte imprimé Auteurs : Idil Arslan-Alaton, Auteur ; Gulcan Basar, Auteur ; Tugba Olmez, Auteur Année de publication : 2012 Article en page(s) : p. 387-394 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Oxydation Colorants réactifs Ozonation Index. décimale : 667.3 Teinture et impression des tissus Résumé : Ozonation of the commercially important, recalcitrant reactive dye intermediate 2-naphthylamine 3,6,8-trisulphonic acid (K-Acid) was investigated. Ozonation performance was examined by following ozone absorption rates and K-Acid, chemical oxygen demand and total organic carbon removals. Mean oxidation states and unidentified organic products were also determined. At pH 3, where direct ozone reactions are dominant, the second-order rate constant between K-Acid and molecular ozone was determined as 20 m?1 s?1 for steady-state aqueous ozone concentration. The competition kinetics approach was also adopted where a reference compound, phenol, and K-Acid were subjected to ozonation. By applying this method, the second-order reaction rate constant was found to be 76 m?1 s?1. Common oxidation products formed during ozonation at pH 3, pH 7 and pH 7 with 1 mm hydrogen peroxide were identified as methoxy-phenyl-oxime, phenol, benzene, benzaldehyde and oxalic acid via high-performance liquid chromatography and gas chromatography/mass spectrometry analyses. Continuous nitrate and sulphate evolution were observed during K-Acid ozonation as a consequence of the abrupt release and subsequent oxidation of its amino and sulphonate groups. The number and amount of reaction products were most intensive for K-Acid ozonation at pH 7 with 1 mm hydrogen peroxide. According to the acute toxicity tests conducted with Vibrio fischeri, ozonation products were not less toxic than the original K-Acid solution that caused only 15% inhibition. Note de contenu : - EXPERIMENTAL : Materials - Ozonation experiments - Oxidation products identification - Other analytical procedures - Acute toxicity - RESULTS AND DISCUSSION : Baseline experiments - Kinetic assessment - Ozonation products and acute toxicity assessment - Changes i acute toxicity DOI : 10.1111/j.1478-4408.2012.00392.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00392.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15807 [article]

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Effects of alkali and ultraviolet treatment on colour strength and mechanical properties of jute yarn / Ali A. Zolriasatein in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 5 (2012) . - p. 395-402 Titre : Effects of alkali and ultraviolet treatment on colour strength and mechanical properties of jute yarn Type de document : texte imprimé Auteurs : Ali A. Zolriasatein, Auteur ; Mohammad Esmail Yazdanshenas, Auteur ; Ramin Khajavi, Auteur ; Abosaeed Rashidi, Auteur Année de publication : 2012 Article en page(s) : p. 395-402 Note générale : Errata (voir URL) - Bibliogr. Langues : Anglais (eng) Catégories : Bases (chimie) Colorants réactifs Essais dynamiques Fibres végétales -- Propriétés mécaniques Jute et constituants Le jute est une plante herbacée de la famille des Malvacées, cultivée dans les régions tropicales pour ses fibres. Jute est aussi le nom donné à ces fibres textiles, appelées aussi chanvre de Calcutta. Nom scientifique : Corchorus capsularis L., famille des Malvacées, sous-famille des Grewioideae ; la classification classique le situe dans la famille des Tiliacées. Une plante voisine, Corchorus olitorius L., la corète potagère, est aussi utilisée aux mêmes fins. Rayonnement ultraviolet Solutions aqueuses (chimie) Teinture -- Fibres textiles Traction (mécanique) Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, jute yarns were treated with an aqueous alkali solution and ultraviolet light to improve dyeability. Ultraviolet light treatments were carried out at an air pressure of 1 atm, under water and vacuum, and all the samples were dyed with reactive dyes. Virgin samples and treated jute yarns were analysed by Fourier Transform–infrared spectroscopy. K/S values were determined by a reflective spectrophotometer and used to establish the fixation values and colour strength of the dyed samples. The tensile mechanical properties of the samples were also measured by a tensile testing apparatus and were compared with the virgin samples. Alkali treatment resulted in a reduction in carbonyl group concentration. However, atmospheric ultraviolet light treatment increased carbonyl group concentration. Dyeability and dye fixation values for atmospheric and underwater ultraviolet light-treated samples increased. Furthermore, the loss of tensile strength for alkali-treated samples was much greater than others (up to 50%) in comparison with ultraviolet light-treated samples. Note de contenu : - EXPERIMENTAL : Materials - Alkali and UV light treatment - Dyeing and determination of colour strength - Dye fixation assessment - Fourier transform-infrared spectroscopy - Mechanical properties and moisture regain - RESULTS AND DISCUSSION : Fibre characterisation - Effect of alkali and UV light treatment on the shade of jute yarns - Dye strength of alkali and UV light treated jute yarns - Effect of UV light treatment in atmosphere and water on the dye strength of reactive dye - Effect of UV light treatment in atmosphere, water and vacuum on fixation of reactive dye - Mechanical properties. DOI : 10.1111/j.1478-4408.2012.00393.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00393.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15808 [article]

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Textile with immobilised nano titanium dioxide for repeated discoloration of CI Reactive Black 5 under UV-A / Majid Montazer in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 5 (2012) . - p. 403-409 Titre : Textile with immobilised nano titanium dioxide for repeated discoloration of CI Reactive Black 5 under UV-A Type de document : texte imprimé Auteurs : Majid Montazer, Auteur ; Samaneh Hashemikia, Auteur Année de publication : 2012 Article en page(s) : p. 403-409 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants réactifs Colorants réactifs -- Effets du rayonnement ultraviolet 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). Décoloration Dioxyde de titane Fibres textiles Nanoparticules Photocatalyse Photodétérioration Polyesters Solutions aqueuses (chimie) Traitement par irradiation Index. décimale : 667.3 Teinture et impression des tissus Résumé : A commercially available catalyst with high photocatalytic activity (Degussa p-25) was immobilised on a comparatively inexpensive substrate that included cotton/polyester knitted fabric by citric acid under sonication. Scanning electron microscopy and energy-dispersive X-ray spectroscopy analysis revealed the presence of nano titanium dioxide on the surface of the fabric. Discoloration of CI Reactive Black 5 in aqueous solution was successfully carried out by adding a piece of nano titanium dioxide-treated fabric into the dye solution under UV-A irradiation. The ultraviolet–visible spectra indicated complete discoloration of CI Reactive Black 5 dye solutions. CI Reactive Black 5 solution, along with electrolytes including sodium sulphate and calcium carbonate, was also successfully discoloured with lower efficiency. Further, the photocatalytic properties of the nano titanium dioxide-immobilised fabric did not change after dye solution discoloration and it was used several times for discoloration of the same solutions. The proposed system can be developed on a large scale. Note de contenu : - EXPERIMENTAL : Materials - Immobilising nano TiO2 on the fabric - Photo reactor - Analytical procedures - RESULTS AND DISCUSSION : Scanning electron microscopy and energy dispersive X-ray spectroscopy - Dye adsorption by nano TiO2 - Calibration - Photocatalytic degradation - CI reactive black 5 degradation kinetic - Influence of sodium sulphate - Effect of calcium carbonate - Effect of calcium carbonate/sodium sulphate - Repeatability of the nano TiO2 fabric photo activity DOI : 10.1111/j.1478-4408.2012.00394.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00394.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15809 [article]

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Low-temperature bleaching of cotton fabric with a binuclear manganese complex of 1,4,7-trimethyl-1,4,7-triazacyclononane as catalyst for hydrogen peroxide / Xinbo Qin in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 5 (2012) . - p. 410-415 Titre : Low-temperature bleaching of cotton fabric with a binuclear manganese complex of 1,4,7-trimethyl-1,4,7-triazacyclononane as catalyst for hydrogen peroxide Type de document : texte imprimé Auteurs : Xinbo Qin, Auteur ; Min Song, Auteur ; Hui Ma, Auteur ; Chong Yin, Auteur ; Yi Zhong, Auteur ; Linping Zhang, Auteur ; Zhengping Mao, Auteur Année de publication : 2012 Article en page(s) : p. 410-415 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de blanchiment Catalyseurs Complexes métalliques 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). Manganèse Peroxyde d'hydrogène Le peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales. Index. décimale : 667.3 Teinture et impression des tissus Résumé : Bleaching of cellulose fabric with hydrogen peroxide is traditionally conducted under alkaline conditions at high temperature, which leads to greater energy consumption and fibre damage. In this study, a binuclear manganese complex of the ligand 1,4,7-trimethyl-1,4,7-triazacyclononane as the catalyst for hydrogen peroxide bleaching was synthesised via a simplified method. Low-temperature bleaching of cotton fabric with the manganese complex and the effect of key bleaching variables on the bleaching performance were investigated. Hydrogen peroxide could be catalysed to bleach cotton knitted fabric at a temperature as low as 60 °C by incorporating the complex in the bleaching solution. The whiteness index of the fabric bleached at low temperature was lower than that of fabric bleached at high temperature, but the bursting strength retention is much better for the fabric bleached at low temperature. The low temperature is energy-saving and has environment-friendly advantages over the traditional high-temperature method. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of 1,4,7-trimethyl-1,4,7-triazacyclononane (Me3TACN) - Synthesis of binuclear manganese complex MnMe3TACN - RESULTS AND DISCUSSION : Analysis and characterisation of 1,4,7-trimethyl-1,4,7-triazacyclononane liand (Me3TACN) - Analysis and characterisation of binuclear manganese complex MnMe3TACN - Low-temperature bleaching of cotton knitted fabric with MnMe3TACN DOI : 10.1111/j.1478-4408.2012.00396.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00396.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15810 [article]

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14163	-	Périodique	Bibliothèque principale	Documentaires	Disponible