One-bath union dyeing of a modified wool/acrylic blend with acid and reactive dyes / Reda M. El-Shishtawy in COLORATION TECHNOLOGY, Vol. 127, N° 1 (2011)  

[article]  inCOLORATION TECHNOLOGY > Vol. 127, N° 1 (2011) . - p. 28-38 Titre : One-bath union dyeing of a modified wool/acrylic blend with acid and reactive dyes Type de document : texte imprimé Auteurs : Reda M. El-Shishtawy, Auteur ; Manal M. El-Zawahry, Auteur ; Nahed S. E. Ahmed, Auteur Année de publication : 2011 Article en page(s) : p. 28-38 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amidoximation Colorants acides Colorants réactifs Fibres acryliques Laine Index. décimale : 667.3 Teinture et impression des tissus Résumé : Pretreated wool/acrylic fibre was obtained by a facile amidoximation process. Fibre characterisation (nitrogen content, tensile strength, shrinkage, infrared spectra and X-ray diffraction) proved the success of the pretreatment. Union dyeing of wool/acrylic fabrics with acid and reactive dyes, namely CI Acid Red 40, CI Acid Blue 25, CI Reactive Red 194 and CI Reactive Blue 25, was obtained using a one-bath dyeing process. Different factors that may affect the dyeability of the blend fibre, such as dyebath pH, liquor ratio, temperature, time and dye concentration, were evaluated with respect to the dye exhaustion, fixation, colour strength, levelling and fastness properties. Excellent to good fastness was obtained for all samples, irrespective of the dye used. The result of the investigation offers a new viable method for union dyeing of wool/acrylic fibres in a one-dyebath process. DOI : 10.1111/j.1478-4408.2010.00275.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00275.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10901 [article]

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Polydopamine-AgNPs coated acrylic fabric for antimicrobial and antioxidant textiles / Esam S. Allehyani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 3 (05/2023) . - p. 1133-1143 Titre : Polydopamine-AgNPs coated acrylic fabric for antimicrobial and antioxidant textiles Type de document : texte imprimé Auteurs : Esam S. Allehyani, Auteur ; Yaaser Q. Almulaiky, Auteur ; Sami A. Al-Harbi, Auteur ; Reda M. El-Shishtawy, Auteur Année de publication : 2023 Article en page(s) : p. 1133-1143 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Amidoximation Antimicrobiens Antioxydants Argent Enduction textile Nanoparticules Polyacryliques Polydopamine Résistance à la traction Revêtements -- Propriétés mécaniques Revêtements organiques Surfaces fonctionnelles Textiles et tissus à usages médicaux Textiles et tissus synthétiques Index. décimale : 667.9 Revêtements et enduits Résumé : There is an increase in public awareness of functional textiles, which strive to produce innovative fabrics for specific applications. In this context, acrylic polymer, a significant synthetic fabric used in the textile industry, was selected to provide it with multifunctional characteristics. For this purpose, the acrylic fabric was functionalized with amidoxime groups to serve as ligands for immobilizing silver ions so that it can be further in situ reduced to AgNPs. Polydopamine (PDA) has the advantage of being an ion binding and reducing agent by virtue of its phenolic hydroxyl groups capable of reducing silver ions to AgNPs, and it was exploited in this study for imparting the acrylic fabric with antimicrobial and antioxidant properties. Additionally, glucose as a reducing agent was also used to form AgNPs-loaded amidoximated acrylic fabric. The pristine, amidoximated, PDA-coated AgNPs-loaded amidoximated, and AgNPs-loaded amidoximated acrylic fabrics have been characterized using ATR-FTIR, SEM, EDX, and tensile strength. All fabric samples were assessed as antioxidants using DPPH and FRAP assays. Antimicrobial properties against Pseudomonas Aeruginosa, Staphylococcus aureus, Escherichia coli and Candida albicans were also evaluated using broth assay. An almost complete killing (99.99%) of the pathogenic Gram-negative Escherichia coli was achieved using PDA-coated AgNPs-loaded amidoximated acrylic fabric. The overall results indicated that the composite nanocoating using PDA-AgNPs showed good tensile strength and excellent antioxidant and antimicrobial properties to suggest the viability of PDA-AgNPs coating of fabrics for possible application as biomedical textiles. Note de contenu : - EXPERIMENTAL : Materials - Methods - RESULTS AND DISCUSSION : Synthesis - SEM–EDX analysis - ATR-FTIR - Tensile strength - Antioxidant activity - Antimicrobial properties - Table 1 : ATR-FTIR characteristic absorption peaks of amidoximated acrylic fabrics before and after coating with PDA and AgNPs - Table 2 : Antimicrobial efficacies of different acrylic fabrics - Table 3 : Survival bacterial count versus time DOI : https://doi.org/10.1007/s11998-022-00711-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00711-0.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39453 [article]

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