Effect of corona discharge treatment on indigo dyed cotton fabric / Shirin Nourbakhsh in COLORATION TECHNOLOGY, Vol. 124, N° 1 (2008)  

[article]  inCOLORATION TECHNOLOGY > Vol. 124, N° 1 (2008) . - p. 43-47 Titre : Effect of corona discharge treatment on indigo dyed cotton fabric Type de document : texte imprimé Auteurs : Shirin Nourbakhsh, Auteur ; Mohammad Esmail Yazdanshenas, Auteur Année de publication : 2009 Article en page(s) : p. 43-47 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : The present study proposes new conditions for achieving the aged-look effect of denim. Indigo dyed cotton fabrics were treated by corona discharge at different power levels and number of passages. Colorimetric parameters of corona treatment were assessed by the CIE L*a*b* colorimetric system and the pH and colour fastness of samples were tested. The surfaces of dyed samples were studied by scanning electron microscopy and Fourier Transform–infrared ⁄ attenuated total reflectance (FTIR ⁄ ATR) analysis. Under the same conditions of corona treatment, the faded-look effect was reduced as the depth of dyeing was increased. Increasing the power and the number of passages increases L* and b* and decreases a* values. This indicates that samples become lighter and yellower but soaping can reduce yellowness. FTIR ⁄ ATR results show that indigo dye oxidises, and isatin and anthranilic acid are produced. The pH levels of corona-treated samples reduce as the power and number of passages increase. This acidification is in agreement with the results of FTIR ⁄ ATR analysis. DOI : 10.1111/j.1478-4408.2007.00119.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2007.00119.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3138 [article]

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Effects of alkali and ultraviolet treatment on colour strength and mechanical properties of jute yarn / Ali A. Zolriasatein in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 5 (2012) . - p. 395-402 Titre : Effects of alkali and ultraviolet treatment on colour strength and mechanical properties of jute yarn Type de document : texte imprimé Auteurs : Ali A. Zolriasatein, Auteur ; Mohammad Esmail Yazdanshenas, Auteur ; Ramin Khajavi, Auteur ; Abosaeed Rashidi, Auteur Année de publication : 2012 Article en page(s) : p. 395-402 Note générale : Errata (voir URL) - Bibliogr. Langues : Anglais (eng) Catégories : Bases (chimie) Colorants réactifs Essais dynamiques Fibres végétales -- Propriétés mécaniques Jute et constituants Le jute est une plante herbacée de la famille des Malvacées, cultivée dans les régions tropicales pour ses fibres. Jute est aussi le nom donné à ces fibres textiles, appelées aussi chanvre de Calcutta. Nom scientifique : Corchorus capsularis L., famille des Malvacées, sous-famille des Grewioideae ; la classification classique le situe dans la famille des Tiliacées. Une plante voisine, Corchorus olitorius L., la corète potagère, est aussi utilisée aux mêmes fins. Rayonnement ultraviolet Solutions aqueuses (chimie) Teinture -- Fibres textiles Traction (mécanique) Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, jute yarns were treated with an aqueous alkali solution and ultraviolet light to improve dyeability. Ultraviolet light treatments were carried out at an air pressure of 1 atm, under water and vacuum, and all the samples were dyed with reactive dyes. Virgin samples and treated jute yarns were analysed by Fourier Transform–infrared spectroscopy. K/S values were determined by a reflective spectrophotometer and used to establish the fixation values and colour strength of the dyed samples. The tensile mechanical properties of the samples were also measured by a tensile testing apparatus and were compared with the virgin samples. Alkali treatment resulted in a reduction in carbonyl group concentration. However, atmospheric ultraviolet light treatment increased carbonyl group concentration. Dyeability and dye fixation values for atmospheric and underwater ultraviolet light-treated samples increased. Furthermore, the loss of tensile strength for alkali-treated samples was much greater than others (up to 50%) in comparison with ultraviolet light-treated samples. Note de contenu : - EXPERIMENTAL : Materials - Alkali and UV light treatment - Dyeing and determination of colour strength - Dye fixation assessment - Fourier transform-infrared spectroscopy - Mechanical properties and moisture regain - RESULTS AND DISCUSSION : Fibre characterisation - Effect of alkali and UV light treatment on the shade of jute yarns - Dye strength of alkali and UV light treated jute yarns - Effect of UV light treatment in atmosphere and water on the dye strength of reactive dye - Effect of UV light treatment in atmosphere, water and vacuum on fixation of reactive dye - Mechanical properties. DOI : 10.1111/j.1478-4408.2012.00393.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00393.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15808 [article]

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