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Synthesis and application to cotton of a polymeric black colorant prepared by grafting of reactive dyes to polyvinylamine / Jingjing Yang in COLORATION TECHNOLOGY, Vol. 133, N° 5 (10/2017)
[article]
Titre : Synthesis and application to cotton of a polymeric black colorant prepared by grafting of reactive dyes to polyvinylamine Type de document : texte imprimé Auteurs : Jingjing Yang, Auteur ; Jian Li, Auteur ; Xiaoxu Teng, Auteur Année de publication : 2017 Article en page(s) : p. 391-402 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Colorants -- Synthèse
Colorants réactifs
Colorimétrie
CotonLe 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).
Noir (couleur)
Polyvinylamine
Solubilité
Stabilité thermique
Teinture -- Fibres textilesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : A novel polymeric black dye was synthesised by grafting yellow, orange, red, and blue reactive dyes onto polyvinylamine. Such a polymeric black dye takes the onus away from dyers to worry about the compatibility of individual dyes. The polymeric black dye was characterised by Fourier transform infrared, ultraviolet-visible, and nuclear magnetic resonance spectroscopy. The absorption of the polymeric black dye in aqueous solution was nearly constant across the wavelength range 400–700 nm. Compared with a black mixture of reactive dyes with low fixation on cotton, which was prepared by mixing yellow, orange, red, and blue reactive dyes, the polymeric black dye reached 99% fixation on cotton through the use of a crosslinking agent. The colorimetric properties of cotton dyed with the polymeric black dye and with the black mixture of reactive dyes showed that better blackness can be obtained by using the polymeric black dye. Analysis of the thermal stability and penetration ability of the polymeric black dye showed that the polymeric dye has high stability in the application and a uniform distributution in the cotton fabric. Note de contenu : - EXPERIMENTAL : Materials and characterisation - Synthesis - Purification of reactive dyes - Solubility of polymeric black dye - Thermal stability of polymeric black dye - Dyeing and fixing process - Measurement of dye exhaustion, reactivity, and fixation - Measurement of colour yield and fastness testing - Colour measurement of the polymeric black dye - Microscopy of dyed cotton
- RESULTS AND DISCUSSION : Properties and combination of the individual reaction dyes - Preparation and spectroscopic properties of the polymeric black dye - Solubility of the polymeric black dye in aqueous solution - Thermal stability of the polymeric black dye - Colorimetric properties of the black mixture of reactive dyes and the polymeric black dye - Distribution of polymeric colorant within dyed cotton - Fastness propertiesDOI : 10.1111/cote.12292 En ligne : https://drive.google.com/file/d/1vxoVF_64r3HcWm-jZ1dh3NmwLb5df0M2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29198
in COLORATION TECHNOLOGY > Vol. 133, N° 5 (10/2017) . - p. 391-402[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19221 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and photochemical reaction of benzo[a]quinoxalino[2,3-c]phenazine dyes / Radoslaw Podsiadly in COLORATION TECHNOLOGY, Vol. 133, N° 6 (12/2017)
[article]
Titre : Synthesis and photochemical reaction of benzo[a]quinoxalino[2,3-c]phenazine dyes Type de document : texte imprimé Auteurs : Radoslaw Podsiadly, Auteur ; Jolanta Sokolowska, Auteur ; Jolanta Kolinska, Auteur ; Aleksandra Grzelakowska, Auteur Année de publication : 2017 Article en page(s) : p. 498-505 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Colorants -- Synthèse
Photochimie
Photoréactivité
PhotoréticulationIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Novel dyes based on the benzo[a]quinoxalino[2,3-c]phenazine skeleton and necessary intermediates (benzo[a]phenazine-5,6-diones) were synthesized. The heterocyclic dyes and benzo[a]phenazine-5,6-diones were characterized using 1H nuclear magnetic resonance (NMR) spectroscopy and chemical ion (CI) mass spectrometry. Their spectral properties, such as absorption and emission spectra and fluorescence quantum yield, were also measured. Experimental results demonstrated that photolysis of benzo[a]quinoxalino[2,3-c]phenazine dyes in 2-propanol and cyclohexene oxide leads to dihydro derivatives. The same product is formed during irradiation of dye/iodonium salt photoredox pairs in monomers. These compounds absorb incident light at longer wavelength and act as in situ sensitizers. Thus, when a composition was irradiated with a xenon lamp through a 395 cutoff filter, higher conversion was achieved than under monochromatic light. Note de contenu : - EXPERIMENTAL : General - Quantum chemical calculations - Synthesis - Photochemical experiments
- RESULTS AND DISCUSSION : Synthesis and spectroscopic characterization of benzo[a]quinoxalino[2,3-c]phenazine dyes 8 - Photoreaction and photopolymerizationDOI : 10.1111/cote.12300 En ligne : https://drive.google.com/file/d/1ta69j7mDmdNTGqyeKydC8Sl_WMhHyTGv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29497
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Code-barres Cote Support Localisation Section Disponibilité 19395 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and properties of nitrogen heterocycle-functionalized core-shell hyperbranched polyester / Subramanian Karpagam in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 2 (05/2015)
[article]
Titre : Synthesis and properties of nitrogen heterocycle-functionalized core-shell hyperbranched polyester Type de document : texte imprimé Auteurs : Subramanian Karpagam, Auteur ; S. Guhanathan, Auteur Année de publication : 2015 Article en page(s) : p. 233-242 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Analyse thermique
Azote
Calorimétrie
Caractérisation
Composés hétérocycliques
Core-Shell
Diélectriques
Poids moléculaires
Polyesters
Polymères -- Propriétés électriques
Polymères -- Propriétés thermiques
Polymères -- Synthèse
Polymères ramifiés
Résonance magnétique nucléaire
ThermogravimétrieIndex. décimale : 668.4 Plastiques, vinyles Résumé : Core-shell hyperbranched polyesters (HBPE) of third generation prepared from 2,2?-bis (hydroxymethyl) propionic acid (Bis-MPA) as an ABx monomer and N-heterocyclic (indole, piperidine and piperazine) phosphoryl dichloride as a core molecule by melt condensation process. These polymers were characterized by FT-IR, 1H NMR, 13C NMR, 31P NMR, elemental analysis, and MALDI spectroscopy. The thermal behavior of the polymers has been investigated by thermo gravimetric analysis (TGA) and differential scanning calorimetry (DSC). There is no weight loss observed until 250 °C under nitrogen atmosphere. DSC showed that the glass transition temperatures was about ?14 and ?30 °C for the prepared core-shell HBPE. The dielectric properties such as dielectric constant and loss factor for these polyesters were also studied with respect to change of frequency (50 Hz to 5 MHz). Note de contenu : - EXPERIMENTAL : Materials - Methods - Measurements of dielectric properties - Synthesis of N-heterocyclic phosphoryl dichloride - Synthesis of phosphorous containing third generation (G3) of N-heterocyclic hyperbranched polyester (HBPE)
- RESULTS AND DISCUSSION : Synthesis of hyperbranched polyesters - Characterization of hyperbranched polyesters - Degree of branching - Molecular weight and molecular weight distribution - Electrical properties - Thermal propertiesDOI : 10.3139/217.2990 En ligne : https://drive.google.com/file/d/1di8F6zbcE4a7EKMS620xoEVRSJ-DM_m2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23905
in INTERNATIONAL POLYMER PROCESSING > Vol. XXX, N° 2 (05/2015) . - p. 233-242[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17180 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and spectroscopic characterisation of the polygalloyl esters of polyols-models for gallotannins / H. R. Tang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 5 (09-10/2003)
[article]
Titre : Synthesis and spectroscopic characterisation of the polygalloyl esters of polyols-models for gallotannins Type de document : texte imprimé Auteurs : H. R. Tang, Auteur ; Anthony D. Covington, Auteur ; R. A. Hancock, Auteur Année de publication : 2003 Article en page(s) : p. 179-188 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Caractérisation
Composés organiques -- Synthèse
Esters polygalloyliques
Gallo-tanins
PolyolsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Hydrolysable gallotannins are naturally occurring polygalloyl esters of polyols (e.g., glucose) and are widespread in the plant kingdom. A totally new synthesis is described here for polygalloyl (3,4,5-trihydroxybenzoyl) esters of polyols as structural models for gallotannins, so that the structure-function relationships of this group of phytochemicals can be studied. The new synthesis consists of two steps, condensation of trimethoxybenzoyl chloride with a polyol and demethylation with anhydrous aluminium chloride/thiol. Compared to methods already reported, the new synthesis shortens the total reaction time by up to 30 times and gives high yields. Six polygalloyl esters of polyols were synthesised: di-galloyl-ethylene glycol (DGE), tri-galloyl-glycerol (TGG), tetra-galloyl-meso-erythritol (TGE), penta-galloyl-adonitol (PGA), ß-penta-galloyl-D-glucose (PGG) and hexa-galloyl-dulcitol (HGD). Amongst them, TGE, PGA and HGD are prepared for the first time. The polyphenols and
their permethylated derivatives were characterised using a combination of NMR and mass spectroscopic techniques. The effects of galloylation on the NMR properties of polyols are also discussed.Note de contenu : - EXPERIMENTAL :
- Materials and methods
- Preparation of poly-(3,4,5-trimethoxybenzoyl)-polyols
- Demethylation of permethylated polygalloyl polyols
- RESULTS AND DISCUSSION :
- Synthesis of polygalloyl polyols
- Spectroscopic characterisation of permethylated polygalloyl esters
- Spectroscopic characterisation of polygalloyl polyols
- Table 1 : Data for permethylated polygalloyl esters 2a-7a
- Table 2 : H NMR data for permethylated polygalloyl esters 2a - 7a*
- Table 3 : 13C NMR data for permethylated polygalloyl esters 2a - 7a*
- Table 4 : Data for polygalloyl esters of polyols 2 - 7
- Table 5 : H NMR data for polygalloyl esters (2-7)
- Table 6 : 13C NMR Data for polygalloyl esters 2-7En ligne : https://drive.google.com/file/d/1dJsl5exn-XbLBsFXulD7COfgg5qdqqkQ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39743
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 5 (09-10/2003) . - p. 179-188[article]Synthesis, characterisation, and study of the photophysical properties of highly stable imidazole-based novel solid-state fluorescent azo colourants / Preetam N. Moolya in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)
[article]
Titre : Synthesis, characterisation, and study of the photophysical properties of highly stable imidazole-based novel solid-state fluorescent azo colourants Type de document : texte imprimé Auteurs : Preetam N. Moolya, Auteur ; Balu L. Gadilohar, Auteur ; Ganapati S. Shankarling, Auteur Année de publication : 2015 Article en page(s) : p. 104-109 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Caractérisation
Colorants -- Propriétés thermiques
Colorants -- Solubilité
Colorants -- Synthèse
Colorants azoïques
FluorescenceIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Novel solid-state fluorescent azo colourants derived from 5-amino-2-(4-dimethylaminophenyl) benzimidazole as electron donor were synthesised. The colourants were characterised by means of elemental analysis, 1H NMR, and mass spectrometry. These colourants showed molar extinction coefficients in the range 12 000–48 000 dm3 mol?1 cm?1. These compounds exhibited solid-state fluorescence under short UV (254 nm). Electron coupling originating from broad ?-electron delocalisation and keto–enol form is responsible for the large Stokes shift as indicated by absorption and fluorescence spectra. These colourants were soluble in polar aprotic high-boiling solvents such as N,N-dimethylformamide, N,N-dimethylacetamide, and dimethyl sulphoxide, whereas they were insoluble in other common organic solvents. Thermogravimetric analysis of solid-state fluorescent colourants showed that two of the colourants showed thermal stability in the range 230–240 °C, whereas for the rest of the colourants it was found to be lower, and hence the two colourants could find application in the coloration of polymers. Note de contenu : - EXPERIMENTAL : Materials and equipment - Chemical synthesis
- RESULTS AND DISCUSSION : Synthesis of solid-state fluorescent azo colourants - Spectroscopic properties of colourants 4a-4e - Thermal properties of the colourants - Solid-state fluorescenceDOI : 10.1111/cote.12128 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12128 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23657
in COLORATION TECHNOLOGY > Vol. 131, N° 2 (04/2015) . - p. 104-109[article]Réservation
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