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Studies of the application of biocolorant for leather dyeing using Monascus Purpureus / A. Tamil Selvi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 4 (04/2018)
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Titre : Studies of the application of biocolorant for leather dyeing using Monascus Purpureus Type de document : texte imprimé Auteurs : A. Tamil Selvi, Auteur ; Gladstone Christopher Jayakumar, Auteur ; N. Usha Rani, Auteur ; Arjunan Yasothai, Auteur Année de publication : 2018 Article en page(s) : p. 105-113 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chimie -- Essais et réactifs
Colorants végétaux
Cuirs et peaux -- Teinture
Essais dynamiques
Extraction (chimie)
Fermentation
Frottements (mécanique)
pH
Photostabilité
Résistance à l'abrasion
Rouge (couleur)
Température
vision des couleursIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : World-wide requirement for colorants from natural origins have been rapidly increasing in the leather sector due to environmental effluent concerns. Biocolorant obtained from Monascus purpureus, which yields red colored extract, has been studied for the dyeing process of leather. The effect of varying conditions like pH, concentration, time and temperature on the levelness of the dyeing, shade brightness, color intensity and exhaustion of the dye have been studied herein, and the conditions optimized. The change in color shade obtained has been quantified by reflectance measurements and compared with the visual assessment data. The bulk properties viz., softness and grain smoothness have been found to be marginally improved, versus control, in biocolorant treated leathers. There is no significant change in strength properties by the use of these natural colorants in the post tanning process. Note de contenu : - EXPERIMENTAL : Reagents and chemical - Microorganism - Substrate and solid-state fermentation - Extraction of biocolorant - experimental trials - Effect of concentration (Trial 1) - Effect of pH (Trial 2) - Effect of temperature (Trial 3) - Effect of time (Trial 4) - Control process - Comparison of experimental and control trials - Analysis of dye exhaustion in the process liquor - Determination of color difference - Visual color assessment - Determination of fastness to light - Determination of fastness to wet and dry rub - Physical testing analysis - Assessment of bulk properties
- RESULTS AND DISCUSSION : Biocolorant production - Natural colorant applied for dye exhaustion : influence of process parameters - Effect of concentration - Effect of pH - Effect of temperature - Effect of time - Effect of surface color at varied condition of biocolorant treatment - Optimized condition of biocolorant treatment Visual assessment of leathers - Light and rub fastness characteristics of leathers - Evaluation of strength characteristics - Assessment of bulk propertiesEn ligne : https://drive.google.com/file/d/1YA5SIZB5vrTUmFlGbGwcF0-7MSrBXeTF/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30339
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIII, N° 4 (04/2018) . - p. 105-113[article]Réservation
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