Dyeing of cotton yarn with the aqueous extract of the leaves of Eupatorium odoratum L. in Thailand and associated extract toxicity studies / Montra Chairat in COLORATION TECHNOLOGY, Vol. 127, N° 5 (2011)  

[article]  inCOLORATION TECHNOLOGY > Vol. 127, N° 5 (2011) . - p. 346-353 Titre : Dyeing of cotton yarn with the aqueous extract of the leaves of Eupatorium odoratum L. in Thailand and associated extract toxicity studies Type de document : texte imprimé Auteurs : Montra Chairat, Auteur ; Udomsak Darumas, Auteur ; John B. Bremner, Auteur ; Phuwadol Bangrak, Auteur Année de publication : 2011 Article en page(s) : p. 346-353 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Toxicologie 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). Eupatorium odoratum Fourier, Spectroscopie infrarouge à transformée de Pigments végétaux Spectroscopie de réflectance Teinture -- Fibres textiles Tests de toxicité Index. décimale : 667.3 Teinture et impression des tissus Résumé : Flavonoid constituents from the aqueous extract of the leaves of Eupatorium odoratum, an invasive weed in Thailand, have potential use as dyestuffs for cotton dyeing. It was found that cotton yarn, which was pretreated with a chitosan solution (with and without a crosslinking glyoxal solution), followed by dyeing with E. odoratum extract in the presence of the inorganic mordant, alum, provided better depth of shade (K/S) and also gave better fastness to light and washing than the untreated cotton yarn. Pretreated cotton yarn with the biomordant solution from Memecylon scutellatum leaves gave relatively poor light and wash fastness of the resultant dyed cotton in the presence of alum. From the toxicity studies, the aqueous extract of the leaves of E. odoratum before and after dyeing showed a high toxicity level to the earthworm (Diplocardia communis) and the guppy fish (Poecilia reticulate). Therefore, it is strongly suggested that E. odoratum aqueous extract after dyeing should be significantly diluted before discharged into the environment. Note de contenu : EXPERIMENTAL : Materials and chemicals - Cotton pretreatment with chitosan solution - Cotton pretreatment with an aqueous leaf extract of M. scutellatum - Aqueous extract of the leaves of E. odoratum and stock solution preparation for toxicity testing - Attenuated total reflectance (ATR) Fourier Transform-infrared analysis (FTIR) - Colour measurement and fastness testing - Toxicity study. RESULTS AND DISCUSSION : Effect of dyeing temperature - ATF-FTIR spectroscopy investigation of a possible mechanism for glyoxal crosslinking to chitosan fibre - Colour hue and fastness properties of dyed cotton with aqueous leaf extract of E. odoratum - Aquatic animal toxicity - Terrestrial animal toxicity. DOI : 10.1111/j.1478-4408.2011.00321.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2011.00321.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12187 [article]

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