Dépouillements

Synthesis and ultraviolet-visible spectroscopic and electrochemical analyses of dyes derived from 2-aminobenzothiazole, and study of their adsorption on titanium dioxide / Anna Maruszewska in COLORATION TECHNOLOGY, Vol. 130, N° 4 (08/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 4 (08/2014) . - p. 243-249 Titre : Synthesis and ultraviolet-visible spectroscopic and electrochemical analyses of dyes derived from 2-aminobenzothiazole, and study of their adsorption on titanium dioxide Type de document : texte imprimé Auteurs : Anna Maruszewska, Auteur ; Radoslaw Podsiadly, Auteur Année de publication : 2014 Article en page(s) : p. 243-249 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aminobenzothiazoles Colorants -- Adsorption Dioxyde de titane Electrochimie Spectroscopie ultraviolette Index. décimale : 667.3 Teinture et impression des tissus Résumé : A series of Schiff bases with hydroxyl anchoring group/s in various positions were synthesised. Their visible light absorption and electrochemical and physicochemical adsorption properties were investigated. Results show that the studied compounds have adequate highest-occupied-molecular-orbital and lowest-unoccupied-molecular-orbital levels that match with the conduction band of titanium dioxide and the redox potential of the electrolyte. Adsorption of azomethine compounds with hydroxyl group/s on titanium dioxide was studied. Experimental data show that the introduction of two ?-hydroxyethyl groups can greatly enhance the adsorption efficiency of the studied Schiff base on titanium dioxide. Sorption kinetics was measured for di-(?-hydroxyethyl)aminobenzyliden-2-aminobenzothiazol. Results show rapid initial sorption (<30 min), followed by a slower rate of increasing uptake between 0.5 and 6 h. Kinetic data were modelled using pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetics equations. These results indicate that the pseudo-second-order equation and intraparticle diffusion model can better describe the adsorption kinetics of di-(?-hydroxyethyl)aminobenzyliden-2-aminobenzothiazol onto titanium dioxide. Note de contenu : - EXPERIMENTAL : General - Synthesis of Schiff bases derived from 2-aminobenzothiazole - Absorption on titanium dioxide - RESULTS AND DISCUSSION : Synthesis and spectroscopic studies - Electrochemical properties - Adsorptions studies DOI : 10.1111/cote.12198 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12098 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21775 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
16443	-	Périodique	Bibliothèque principale	Documentaires	Disponible

6-pyridinium benzo[a]phenazine-5-oxide derivatives as visible photosensitisers for polymerisation / Karolina Podemska in COLORATION TECHNOLOGY, Vol. 130, N° 4 (08/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 4 (08/2014) . - p. 250-259 Titre : 6-pyridinium benzo[a]phenazine-5-oxide derivatives as visible photosensitisers for polymerisation Type de document : texte imprimé Auteurs : Karolina Podemska, Auteur ; Radoslaw Podsiadly, Auteur ; Agnieszka Orzel, Auteur ; Anna Kowalska, Auteur ; Andrzej Marcinek, Auteur ; Jolanta Sokolowska, Auteur Année de publication : 2014 Article en page(s) : p. 250-259 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Synthèse Décoloration Photo-oxydation Photoamorceurs (chimie) Photochimie Polyaddition Triacrylate de triméthylolpropane Index. décimale : 667.3 Teinture et impression des tissus Résumé : Several 6-pyridinium benzo[a]phenazine-5-oxide derivatives have been synthesised and characterised by proton nuclear magnetic resonance spectroscopy and mass spectrometry. The spectroscopic and electrochemical properties of these dyes were examined. The dyes were used as reducible sensitisers for selected electron donors (phenylthioacetic acid, phenoxyacetic acid, N-phenylglycine, and ethyl 4-N,N-dimethylaminobenzoate) and as oxidisable sensitisers for electron acceptors (onium and N-alkoxypyridinium salts). These photoredox pairs were found to be effective visible-wavelength photoinitiators for the free radical polymerisation of trimethylolpropane triacrylate under visible light. The cationic photopolymerisation of cyclohexene oxide by the studied dyes and the onium salt photoredox pairs was ineffective. The obtained results are discussed on the basis of both free energy change for electron transfer to or from the benzo[a]phenazine dyes and the photochemical properties of the dyes, particularly their photobleaching. The proposed mechanism of dye fading is supported by density functional theory calculations and spectroscopic characterisation of the radical cation of the dye. Note de contenu : - Synthesis of 6-pyridinium benzo[a]phenzzine-5-oxide (2a) - Quantum chemical calculations - Photochemical experiments DOI : 10.1111/cote.12096 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12096 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21776 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
16443	-	Périodique	Bibliothèque principale	Documentaires	Disponible

The preparation and dyeing properties of pineapple leaf fibres modified with a cationic modifier / Chaohong Dong in COLORATION TECHNOLOGY, Vol. 130, N° 4 (08/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 4 (08/2014) . - p. 260-265 Titre : The preparation and dyeing properties of pineapple leaf fibres modified with a cationic modifier Type de document : texte imprimé Auteurs : Chaohong Dong, Auteur ; Zhou Lu, Auteur ; Xiao Zhang, Auteur ; Ping Zhu, Auteur ; Nana Li, Auteur Année de publication : 2014 Article en page(s) : p. 260-265 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ananas et constituants Colorants réactifs Fibres végétales 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. Surfactants Teinture -- Fibres textiles Traîtements de surface Index. décimale : 667.3 Teinture et impression des tissus Résumé : Pineapple leaf fibres were modified with cationic modifier GX-H23 and dodecyl dimethyl benzyl ammonium chloride (surfactant 1227) to change their surface electric properties. After modification, the pineapple leaf fibres were dyed separately with CI Reactive Red 15 under traditional and salt-free dyeing conditions. Based on dye uptake analysis, the influence of different modification and dyeing conditions on the dyeing properties of pineapple leaf fibres were evaluated. The results showed that the modified pineapple leaf fibres under salt-free dyeing conditions exhibited superior dye uptake, especially when the cationic modifier GX-H23 was used. The optimum parameters for modification with surfactant 1227 were: 15 g/l of surfactant 1227, 10 g/l of sodium hydroxide, and 90 °C for 30 min; the optimum parameters for modification with cationic modifier GX-H23 were: 15 g/l of cationic modifier GX-H23, 20 g/l of sodium hydroxide, and 60 °C for 40 min. Note de contenu : - EXPERIMENTAL : Materials - Modification process - Standard curve of CL reactive red 15 dye - Dyeing process - Analysis of carbon, hydrogen, and nitrogen - Tests methods for determining the percentage dye uptake - Fixation test - Evaluation of soaping fastness - RESULTS AND DISCUSSION : Analysis of carbon, hydrogen, and nitrogen - Change in percentage dye uptake - Effect of modifier concentration on dye uptake - Effect of sodium hydroxide concentration on dye uptake - Effect of treatment on dye uptake - Effect of modification temperature on dye uptake - Dyeing performance of modified pineapple leaf fibres - Effect of dye concentration on dye uptake - Effect of dyeing temperature on dye uptake - Effect of dyeing time on dye uptake - Effect of sodium carbonate concentration on dye uptake - Comparison of dyeing properties of unmodified and modified fibres under optimum conditions DOI : 10.1111/cote.12091 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12091 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21777 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
16443	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Foam properties and application in dyeing cotton fabrics with reactive dyes / Hong Yu in COLORATION TECHNOLOGY, Vol. 130, N° 4 (08/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 4 (08/2014) . - p. 266-272 Titre : Foam properties and application in dyeing cotton fabrics with reactive dyes Type de document : texte imprimé Auteurs : Hong Yu, Auteur ; Yuanfeng Wang, Auteur ; Yi Zhong, Auteur ; Zhiping Mao, Auteur ; Sisi Tan, Auteur Année de publication : 2014 Article en page(s) : p. 266-272 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). Moussants Mousse (chimie) Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : The foam dyeing of cotton fabric with CI Reactive Red 120 has been studied as a low-add-on technology. The foamability of different types of foaming agent and the stability of foam stabilisers were compared. Factors influencing foam dyeing, including wet pick-up, fixation agent, foam stabiliser, and blow ratio, were evaluated by colour strength and dye fixation rate. Wet pick-up, fixation agent, and foam stabiliser were found to be the main factors in the foam dyeing process. The comparative build-up properties, dyeing properties, and total consumption between foam dyeing and conventional dyeing were assessed. The results indicate that, in foam dyeing, the dyestuff has a better build-up property, the dyed fabric has excellent wash and rub fastness, and large amounts of water and energy are saved. Moreover, foam dyeing requires smaller dosages of chemical agents and reduces the difficulty of effluent treatment. Note de contenu : - EXPERIMENTAL : Materials - Foaming by mechanical agitation - Foam dyeing of cotton fabric - Conventional pad dyeing of cotton fabric - Measurements - RESULTS AND DISCUSSION : Foam properties - Foam dyeing behaviour - Comparison of foam dyeing and conventional pad dyeing DOI : 10.1111/cote.12088 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12088 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21778 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
16443	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Rheological studies of mixed printing pastes from sodium alginate and modified xanthan and their application in the reactive printing of cotton / Lili Wang in COLORATION TECHNOLOGY, Vol. 130, N° 4 (08/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 4 (08/2014) . - p. 273-279 Titre : Rheological studies of mixed printing pastes from sodium alginate and modified xanthan and their application in the reactive printing of cotton Type de document : texte imprimé Auteurs : Lili Wang, Auteur ; Baojiang Liu, Auteur ; Qun Yang, Auteur ; Danian Lu, Auteur Année de publication : 2014 Article en page(s) : p. 273-279 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alginate de sodium L'alginate de sodium ou polymannuronate sodique, de formule NaC6H7O6 est un additif alimentaire (E401) utilisé dans les boissons, constitué d’alginate et de sodium. Il se présente sous forme de poudre blanche à blanc crème, inodore et sans saveur, très soluble dans l'eau. C'est une longue molécule extraite d'algues brunes, constituée d'unités de glucides reliées ensemble pour former une chaîne. 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). Epaississants Gomme de xanthane La gomme xanthane est un polyoside obtenu à partir de l'action d'une bactérie, la Xanthomonas campestris. Elle est soluble à froid et est utilisée comme additif alimentaire sous le code E415 pour ses propriétés épaississantes et gélifiantes afin de modifier la consistance des aliments. Le xanthane est l'un des exopolysaccharides excrétés par divers microorganismes du sol (bactéries notamment). Il joue un rôle important, à l'échelle moléculaire, dans la formation et la conservation des sols3, tout comme le dextrane, le rhamsane ou les succinoglycanes. Impression sur étoffes Pâtes d'impression Rhéologie Sérigraphie Index. décimale : 667.3 Teinture et impression des tissus Résumé : The rheology of printing pastes using sodium alginate and modified xanthan as mixed thickeners has been measured by steady shear tests and dynamic strain sweep tests. The rheological results showed that, with a small addition of modified xanthan to sodium alginate, the flowability of the mixed printing pastes was better than that with sodium alginate alone. Subsequently, as the addition of modified xanthan increased, the apparent viscosity at low shear rates increased gradually, and the mixed printing pastes gained increasingly pronounced shear-thinning features. In addition, the mixed printing pastes with more sodium alginate exhibited mainly viscous behaviour under strain, and the liquid-like features became increasingly weak with the addition of modified xanthan. On the other hand, the mixed printing pastes with more modified xanthan exhibited mainly elastic behaviour within the linear viscoelastic region, and the solid-like features became increasingly marked with the addition of modified xanthan. Mixtures of sodium alginate and modified xanthan can be used as thickeners in the reactive printing of cotton, producing a good colour yield, levelness, and outline sharpness. In particular, for large patterns, the mixed printing paste performed best when the ratio of sodium alginate to modified xanthan was 80:20; for fine patterns, it performed best when the ratio of sodium alginate to modified xanthan was 20:80. Note de contenu : - EXPERIMENTAL : Materials - Chemical modification of xanthan - Preparation of the mixed printing pastes and the screen printing process - Rheology measurement - Quality-determining parameters - RESULTS AND DISCUSSION : Rheological properties of printing pastes using mixed thickners - Printing performance of printing pastes using SA and MXG as mixed thickeners DOI : 10.1111/cote.12089 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12089 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21779 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
16443	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Self-cleaning bombyx mori silk : room-temperature preparation of anatase nano-TiO2 by the sol-gel method and its application / Chenghui Zheng in COLORATION TECHNOLOGY, Vol. 130, N° 4 (08/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 4 (08/2014) . - p. 280-287 Titre : Self-cleaning bombyx mori silk : room-temperature preparation of anatase nano-TiO2 by the sol-gel method and its application Type de document : texte imprimé Auteurs : Chenghui Zheng, Auteur ; Zhenming Qi, Auteur ; Wenchao Shen, Auteur ; Guoqiang Chen, Auteur Année de publication : 2014 Article en page(s) : p. 280-287 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Dioxyde de titane Essais (technologie) Nanoparticules Soie et constituants Sol-gel, Procédé Textiles et tissus auto-nettoyants Index. décimale : 667.3 Teinture et impression des tissus Résumé : The aim of this work was to obtain anatase nano-TiO2 by the sol–gel method at room temperature and to achieve self-cleaning Bombyx mori silk fabrics. Nano-TiO2 sols based on an aqueous system and an ethanol system were prepared separately by the sol–gel method using tetrabutyl orthotitanate as a precursor at room temperature. Particle size analyses showed that nano-TiO2 particles in an aqueous system were much bigger and more variant than those in ethanol. X-ray diffraction patterns revealed a pure anatase phase of nano-TiO2 in an aqueous system. Crystalline transformation of TiO2 from anatase to rutile by photoradiation at ambient temperature was also proved. Thermogravimetric and differential scanning calorimetric analyses confirmed the phase transformation of nano-TiO2. A scanning electron microscope equipped with an energy-dispersive spectrometer was used to investigate the surface morphology and elements of Bombyx mori silk fabrics. The contact angles with water, the kinetics of photocatalytic degradation of Methylene Blue, and decontamination of red-wine-stained fabrics under ultraviolet radiation demonstrated that the fabrics had good self-cleaning properties and photoinduced hydrophilicity. Note de contenu : - EXPERIMENTAL : Materials - Preparation of nano-TiO2 sols - Self-cleaning finishing of bombyx mori silf fabrics - Characterisation and testing - RESULTS AND DISCUSSION : Particle size analyses of TiO2 sols - Characterisationof sol residues - Scanning electron microscope and energy-dispersive X-ray spectrometer analyses - Contact angle analysis DOI : 10.1111/cote.12092 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12092 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21780 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
16443	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Assessing the performance of a spectral reflectance estimation method based on a diffraction grating and a spectroradiometer / Dejana Javorsek in COLORATION TECHNOLOGY, Vol. 130, N° 4 (08/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 4 (08/2014) . - p. 280-287 Titre : Assessing the performance of a spectral reflectance estimation method based on a diffraction grating and a spectroradiometer Type de document : texte imprimé Auteurs : Dejana Javorsek, Auteur ; Tim Jerman, Auteur ; Blaž Rat, Auteur ; AleÅ¡ Hladnik, Auteur Année de publication : 2014 Article en page(s) : p. 280-287 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Couleur -- Analyse Spectroscopie de réflectance Index. décimale : 667.3 Teinture et impression des tissus Résumé : Constant improvements in digital cameras have made it possible to use these devices for colour acquisition and reproduction at an advanced level. It is known that a colour match for all observers when changing illumination can only be achieved by matching spectral data. Obtaining spectral data from digital camera RGB values could provide a new way of using the digital camera as a spectrophotometric tool or as a high-quality colour-capturing system that is required in more demanding applications. In the present study, two spectral reflectance estimation methods were examined – the Imai–Berns method (ImaiBerns) and the spectral-sensitivity-based method (SpecSens). The purpose of the research was to simplify the procedure of the SpecSens method by using a diffraction grating and a spectroradiometer instead of a monochromator, and to compare the results with those of the ImaiBerns approach. Obtained spectral reflectance estimates were evaluated using the root-mean-square error and ?E00 metrics. Results of the research show that the ImaiBerns method was superior to SpecSens, most likely because the former method does not require knowledge of the camera spectral sensitivities, which often introduces errors into reflectance estimation calculations. Both methods were successful in predicting black, brownish, and dark patches, as indicated by a low root-mean-square error, as well as unsaturated pastel, pink, or skin colours, which produced low ?E00 values. On the other hand, many of the patches with a low root-mean-square error also exhibited high ?E00 values, while bright, nearly-white patches were characterised by a high root-mean-square error. DOI : 10.1111/cote.12095 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12095 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21781 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
16443	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Environmentally friendly coloration of cotton by the UV-induced photografting of a-bromoacrylamido dyes / Yuanyuan Dong in COLORATION TECHNOLOGY, Vol. 130, N° 4 (08/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 4 (08/2014) . - p. 296-304 Titre : Environmentally friendly coloration of cotton by the UV-induced photografting of a-bromoacrylamido dyes Type de document : texte imprimé Auteurs : Yuanyuan Dong, Auteur ; Jinho Jang, Auteur Année de publication : 2014 Article en page(s) : p. 296-304 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale Copolymérisation 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). Greffage (chimie) Photochimie Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Conventional wet dyeing based on dye diffusion and adsorption in water requires large amounts of salt, time, and energy. ?-Bromoacrylamido dyes are photografted onto cotton at room temperature as an environmentally friendly coloration process. Dye-originated radicals are produced by the photoscission of the carbon–sulfur and carbon–bromine bonds of the dyes and subsequently abstract hydrogen atoms to generate cellulose radicals which can initiate graft copolymerisation. About 88% of the dyes are polymerised, and the degree of polymerisation is estimated to be 12.7 or more, which was substantiated by mass and elemental analyses. The colour yield of the photografted cotton is seven times higher than that of conventional dyeing. Furthermore, good colour fastness properties are attributed to the water-insoluble polymeric dyes formed. Note de contenu : - EXPERIMENTAL : Materials and methods - Photografting of ?-bromoacrylamido dyes - Characterisation of the photoreacted dyes - The assessment of dyeing - RESULTS AND DISCUSSION : Elemental analysis - Mass spectrometric analysis - NMR analysis - IR and UV-vis spectroscopy - The effect of UV energy and photoinitiator and dye concentrations - Colour fastness properties DOI : 10.1111/cote.12094 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12094 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21782 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
16443	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Characterisation and application of polyurethane copolymers grafted with photoluminescent dyes / Yong Chan Chung in COLORATION TECHNOLOGY, Vol. 130, N° 4 (08/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 4 (08/2014) . - p. 305-313 Titre : Characterisation and application of polyurethane copolymers grafted with photoluminescent dyes Type de document : texte imprimé Auteurs : Yong Chan Chung, Auteur ; Kiseok Yang, Auteur ; Jae Won Choi, Auteur ; Byoung Chul Chun, Auteur Année de publication : 2014 Article en page(s) : p. 305-313 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique Caractérisation Colorants Copolymères -- Propriétés mécaniques Copolymères -- Synthèse Copolymères greffés Effet mémoire de forme Electrofilature Essais (technologie) Essais dynamiques Photoluminescence Polyuréthanes Traction (mécanique) Index. décimale : 667.9 Revêtements et enduits Résumé : Photoluminescent dyes (aminofluorene, naphthalimide, naphtholbenzein, or phenosafranine) were grafted to polyurethane using an allophanate linkage. The photoluminescence properties and the shape recovery effects of polyurethane samples were investigated. The polyurethane was composed of 4,4?-methylenebis(phenylisocyanate), poly(tetramethyleneglycol), and 1,4-butanediol. The dyes were linked through an extra 4,4?-methylenebis(phenylisocyanate) and the carbamate moiety of the polyurethane chains. Polyurethanes with various dye contents were characterised, and the shape recovery and photoluminescence properties were compared. In the case of the tensile mechanical properties, the highest maximum stress was 56 MPa, and the strain remained > 1500% for the entire series. The shape recovery improved as the test cycle was repeated, with up to 100% recovery being achieved, but shape retention decreased as the dye content increased. Finally, the photoluminescence of the polyurethanes was demonstrated by a luminescent light-emission test, together with pH indication capability and the preparation of non-woven fibre using the electrospinning method. Note de contenu : - EXPERIMENTAL : Materials - Polymer synthesis - Crosslink density - Electrospinning - Characterisation - Shape-memory test - RESULTS AND DISCUSSION : Synthesis and structure of PU - IR and thermal analysis - Crosslink density and viscosity - Tensile mechanical properties - Shape-memory effect - Luminescence of PU - Electrospinning DOI : 10.1111/cote.12097 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12097 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21783 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
16443	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Ionic liquids as performance additives for water-based printing inks / Zuzanna Zolek-Tryznowska in COLORATION TECHNOLOGY, Vol. 130, N° 4 (08/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 4 (08/2014) . - p. 314-318 Titre : Ionic liquids as performance additives for water-based printing inks Type de document : texte imprimé Auteurs : Zuzanna Zolek-Tryznowska, Auteur ; Joanna Izdebska, Auteur ; Malgorzata Golazbek, Auteur Année de publication : 2014 Article en page(s) : p. 314-318 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Angle de contact Encre -- Additifs Encre d'imprimerie Encre en phase aqueuse Encre flexographique Impression sur étoffes Liquides ioniques Qualité -- Contrôle Index. décimale : 667.3 Teinture et impression des tissus Résumé : For the first time, the use of ionic liquids as additives for printing inks in order to improve the wettability of the printing base by the ink is presented. The aim of this work was to study the influence of ionic liquids on the selected properties of water-based printing ink and the prints. The contact angles of the printing inks on the printing base were measured. Modified flexographic inks were laboratory printed on polypropylene plastic film. The impact of small amounts of various ionic liquids on printing ink colour was examined in terms of the optical density of the full-tone area, the colour parameters (L*, a*, b*, CIE), the total colour difference, and the gloss of the dried ink film. The influence of ionic liquids on the ink contact angle, the optical density, and the L*a*b* coordinates is discussed. In general, the investigated ionic liquids improve the wettability of water-based flexographic printing ink, with an acceptable total colour difference. The optical density is increased for printing inks containing ionic liquids in comparison with the original flexographic printing ink, Process. Note de contenu : - MATERIALS AND METHODS : Materials - Ink preparation - Contact angle measurements - Printing - Adhesion - Print quality measurements - RESULTS AND DISCUSSION : Contact angle measurements - Determination of print quality DOI : 10.1111/cote.12099 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12099 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21784 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
16443	-	Périodique	Bibliothèque principale	Documentaires	Disponible