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Photoassisted degradation of CI reactive red 195 using and Fe(III)-grafted polytetrafluoroethylene fibre complex as a novel heterogeneous Fenton catalyst over a wide pH range / Bing Li in COLORATION TECHNOLOGY, Vol. 129, N° 6 (12/2013)
[article]
Titre : Photoassisted degradation of CI reactive red 195 using and Fe(III)-grafted polytetrafluoroethylene fibre complex as a novel heterogeneous Fenton catalyst over a wide pH range Type de document : texte imprimé Auteurs : Bing Li, Auteur ; Yongchun Dong, Auteur ; Ding Zhizhong, Auteur Année de publication : 2013 Article en page(s) : p. 403-411 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : acrylique, Acide L'acide acrylique ou acide acroléïque ou acide prop-2-énoïque est un composé organique de formule brute C3H4O2 et de formule semi-développée CH2=CHCOOH. C'est un acide carboxylique et un alcène vinylique, et se présente comme un liquide incolore à l'odeur âcre.
L'acide acrylique et ses esters, les acrylates, sont utilisés dans la fabrication de matières plastiques, dans les peintures acryliques et dans divers autres polyacryliques qui ont de multiples usages.
Catalyse hétérogène
Colorants azoïques
Colorants réactifs -- Détérioration
Colorants réactifs -- Effets du rayonnement ultraviolet
Copolymères greffés
Fenton, Réaction de
Fer trivalent
Greffage (chimie)
Ions cuivre
Oxydation
pH
Polytétrafluoréthylène
Teinture -- Fibres textiles synthétiquesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Polytetrafluoroethylene fibre was grafted with acrylic acid to form an effective ligand, which coordinated with Fe(III) ions to prepare an Fe(III)-grafted polytetrafluoroethylene fibre complex. The photoassisted degradation of a typical azo dye, CI Reactive Red 195, using the Fe(III)-grafted polytetrafluoroethylene fibre complex as a novel heterogeneous Fenton catalyst in a wide pH range of 3–9 was investigated. In order to achieve better degradation in a higher pH range, the effect of Fe content, incorporation of Cu(II) ions and UV light irradiation on dye degradation was also examined. The results indicated that dye degradation was effective in the presence of the Fe(III)-grafted polytetrafluoroethylene fibre complex. Fast degradation of the dye can take place in an acidic environment. Increasing the Fe content or incorporating Cu(II) ions can significantly accelerate dye degradation, and UV light irradiation is much more effective than visible light irradiation in a higher pH range, especially in the alkaline pH range. Note de contenu : - EXPERIMENTAL : Materials and reagents - Graft polymerization of polytetrafluoroethylene fibres - Preparation of metal-grafted fibre complexes - Charaterisation of metal-grafted fibre complexes - Photocatalytic reaction set-up - Degradation procedure and analysis
- RESULTS AND DISCUSSION : Characterisation of metal-grafted fibre complexes - Metal ions leaching from the catalyst - Heterogeneous decomposition of dye at different solution pH - Fe content of the catalyst - Cu(II) ion as the assistant metal ion - UV light irradiationDOI : 10.1111/cote.12049 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/cote.12049/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19739
in COLORATION TECHNOLOGY > Vol. 129, N° 6 (12/2013) . - p. 403-411[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15730 - Périodique Bibliothèque principale Documentaires Disponible The renaissance of Fe(III) as self-tanning agent / R. Karthikeyan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 4 (07-08/2011)
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Titre : The renaissance of Fe(III) as self-tanning agent Type de document : texte imprimé Auteurs : R. Karthikeyan, Auteur ; R. Ramesh, Auteur ; R. Venba, Auteur ; Usha Ramamoorthy, Auteur ; Chandra Babu Narasimhan Kannan, Auteur Année de publication : 2011 Article en page(s) : p. 171-176 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acides gras
Couleur -- Analyse
Fer trivalent
Microscopie électronique à balayage
Polycarboxylates
TannageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Iron tanning is considered an alternative due to close similarity between the aqueous chemistry of Cr(III) and Fe(III). This arises primarily from the hydrolitic behaviour of Fe(III) complexes. An attempt has been made in the present study to improve the stability of Fe(III) comple by chelation with suitable ligand in order to increase the shrinkage temperature of the leather. An Fe(III) based tanning system which involves a treatment with a fatty acid and a polycarboxylate has been standardized to produce leather with shrinkage temperature (Ts)>100°C. Scanning electron microscopy on the tanned leathers was used to study the structural characteristics of leathers produced. A comparative colour analysis was studied against standard chrome leather to reveal the dyeing and colour characteristics of the proposed tanning system. The excess neutral salt used in the developed process has the tendency to reduce the acidity of the metal ion, which produces iron-tanned leather with strength properties comparable to those of chrome-tanned leather. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Standardization of Fe(III) based self-tanning method - Determination of shrinkage temperature - Determination of Fe(III) in spent tan liquors - Wet finishing for the leathers - Scanning electron microscopy - Physical testing and visual assessment - Colour measurement.
- RESULTS AND DISCUSSION : Standardization of Fe(III) based self-tanning - Structural characterization of iron tanned leather - Physical testing and visual assessment data - Colour characteristics.En ligne : https://drive.google.com/file/d/1f7HyKj30Xc_nrwppK8EAztYFe7bWT64Q/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11861
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 4 (07-08/2011) . - p. 171-176[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013212 - Périodique Bibliothèque principale Documentaires Disponible