Coloration of cellulose nanofibres with pigments / Shamshad Ali in COLORATION TECHNOLOGY, Vol. 136, N° 5 (10/2020)  

[article]  inCOLORATION TECHNOLOGY > Vol. 136, N° 5 (10/2020) . - p. 427-434 Titre : Coloration of cellulose nanofibres with pigments Type de document : texte imprimé Auteurs : Shamshad Ali, Auteur ; Awais Khatri, Auteur ; Urooj Baig, Auteur ; Alishba Javeed, Auteur ; Nadir Ali Rind, Auteur Année de publication : 2020 Article en page(s) : p. 427-434 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Colorimétrie Eaux usées -- Analyse Electrofilature Essais (technologie) Fibres cellulosiques Fibres textiles -- Propriétés mécaniques Morphologie (matériaux) Nanofibres Pigments Résistance au lavage Solidité de la couleur Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : Electrospun nanofibrous mats are popular for their wide technological applications as medical, filtration, sensing and high performance textiles. The potential for coloration of electrospun nanofibrous mats for aesthetic purposes has also been explored recently, and the pigment coloration of cellulose electrospun nanofibrous mats is reported for the first time in this paper. Cellulose acetate electrospun nanofibrous mats were fabricated using electrospinning followed by treatment with sodium hydroxide to synthesise regenerated cellulose electrospun nanofibrous mats. Then the cellulose mats were coloured with commercially available pigments by a pad‐dry‐bake method. Excellent K/S and colour fastness to both washing and light were produced with the application of three commercial pigments. The pH and total dissolved solids content of the coloration wastewater, as well as the mechanical properties of the electrospun nanofibrous mats, were also tested. Attenuated total reflection‐Fourier Transform infrared spectroscopy and scanning electron microscopy analysis were used for characterisation. Note de contenu : - EXPERIMENTAL : Materials - Preparation of CEL ENMs - Pigment coloration of CEL ENMs - Colour measurement and testing - Wastewater testing - Characterisation - Mechanical properties of ENMs - RESULTS AND DISCUSSION : Chemical structures of CA and CEL ENMs - Effect of bakint temperature on K/S - Effect of baking time on K/S - Effect of pigment quantity on K/S - Effect of pigment quantity on the colorimetric values of coloured CEL ENMs - Analysis of wastewater testing - Colour fastness properties - Surface morphology of ENMs - Mechanical properties of ENMs DOI : https://doi.org/10.1111/cote.12485 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12485 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34486 [article]

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Using biodegradable organic salt for cotton garment dyeing to reduce effluent pollution / Ali Raza in COLORATION TECHNOLOGY, Vol. 138, N° 4 (08/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 4 (08/2022) . - p. 388-396 Titre : Using biodegradable organic salt for cotton garment dyeing to reduce effluent pollution Type de document : texte imprimé Auteurs : Ali Raza, Auteur ; Ali Shamhad, Auteur ; Awais Khatri, Auteur ; Alishba Javeed, Auteur Année de publication : 2022 Article en page(s) : p. 388-396 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Colorants réactifs 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). Eaux usées -- Analyse Etudes comparatives Noir (couleur) Résistance à la traction Sels Solidité de la couleur Solidité de la teinture Teinture -- Fibres textiles Textiles et tissus -- Propriétés mécaniques Vêtements Index. décimale : 667.3 Teinture et impression des tissus Résumé : The replacement of inorganic salt and alkali in the reactive dyeing of cotton textiles with organic biodegradable compound has been explored in recent years. We report the use of organic salt, tetra sodium salt of glutamic acid diacetic acid (GLDA-Na4) in the batchwise dyeing of cotton garment as an exhausting and fixing agent. The reactive dye, CI Reactive Black 5 was selected for the present study. The results revealed that the maximum K/S value of 25.5 and fixation of 90.74% was obtained using GLDA-Na4 at laboratory scale experiments. Furthermore, the effluent samples test results demonstrated considerably reduced total dissolved solids (TDS) and chemical oxygen demand (COD) contents with GLDA-Na4 in comparison to the inorganic chemicals. The colourfastness to light, rubbing and washing have demonstrated similar ratings with GLDA-Na4 and inorganic chemicals. The tensile strength of samples was enhanced by using GLDA-Na4. Note de contenu : - EXPERIMENTAL : Materials - Methods - Measurements - RESULTS AND DISCUSSIONS : Effect of sodium chloride and sodium carbonate concentrations - Effect of fixation temperature and time in batchwise garment dyeing - Effect of GLDA-Na4 concentration - Effect of fixation temperature and time using GLDA-Na4 in batchwise garment dyeing - Comparison of dyeing results - Comparison of colour build-up of the dyed samples - Comparison of cost Colourfastness properties - Characterisation of the dyeing effluent - Tensile strength - Table 1 : Dyeing results comparison of organic salt and inorganic salt and alkali - Table 2 : Comparison of K/S and %F achieved using sodium edetate and tetra sodium salt of glutamic acid diacetic acid (GLDA-Na4) - Table 3 : Comparison of cost of dyed readymade cotton pants - Table 4 : Colourfastness to washing, light and rubbing results - Table 5 : Tensile strength of dyed samples in warp and weft directions DOI : https://doi.org/10.1111/cote.12599 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12599 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37891 [article]

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