ß-Cyclodextrin: Disperse yellow 211 complexes improve coloristic intensity of polyamide dyed knits
| Autor: | Helen Beraldo Firmino, Miliane Aparecida de Lima, Rafael Block Samulewski, Murilo Pereira Moisés, Fabricio Maestá Bezerra, Manuel J. Lis, Dayane Samara de Carvalho Cotre, André Mathias Souza Plath |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. POLQUITEX - Materials Polimérics i Química Téxtil |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Tints i tenyit
Polymers and Plastics Color Polyamides 02 engineering and technology 010402 general chemistry Photochemistry 01 natural sciences Human health Chemical Engineering (miscellaneous) Dyes and dyeing Cyclodextrin Ciclodextrines Effluent Enginyeria tèxtil::Fabricació tèxtil::Tintura [Àrees temàtiques de la UPC] chemistry.chemical_classification Cyclodextrins Dyeing Poliamides Coloring Agents--chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Disperse yellow chemistry Aquatic environment Polyamide Colorants -- Química 0210 nano-technology Intensity (heat transfer) |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| DOI: | 10.1177/00405175211022624 |
| Popis: | Dyes are complex molecules that can sometimes cause damage to the aquatic environment and harm human health. They are often not completely removed from effluent by the usual treatments; therefore, efforts have been made to increase their exhaustion from dyeing through chemical and physical processes. In this context, the use of β-cyclodextrin (β-CD) as dyeing auxiliary agent promotes the reduction of harmful products, also increasing the color intensity of the fabric. In this paper, β-CD was used as a complexing agent to dye polyamide (PA) using the dye C.I. Disperse Yellow 211 (DY211) in order to improve dye exhaustion and color intensity using the β-CD:DY211 complex. The conventional dyeing process and β-CD:DY211 dyeing process by exhaustion were compared, and adsorption kinetics, isotherms, and the coloristic intensity were evaluated. The chemical shifts in the FTIR spectra and the thermal stability evidenced the formation of the β-CD:DY211 complex. Regarding dyeing kinetics and isotherm, the pseudo-first-order model was the most appropriate to describe the process, while Nernst isotherm was the one that best represented the adsorption results. Categorically, the samples dyed with the β-CD:DY211 complex obtained higher coloristic intensity in comparison with the conventional process. With this evidence, it is possible to conclude that cyclodextrin is a suitable replacement for environmentally harmful textile aides without adding further steps into the dyeing process or the need for additional equipment. |
| Databáze: | OpenAIRE |
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