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13.334 Articles in journals published by the UPC
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  • Boletín Intexter del Instituto de Investigación Textil y de Cooperación Industrial
  • 1970, núm. 44
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Estudio de equilibrios heterogéneos en fibras poliamídicas. Nueva técnica de desorción y su aplicación al ácido ß-naftalensulfónico y colorantes azoicos. Cálculo de afinidades y calores de reacción.

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Crespo Cereceda, Rufo
Areal Guerra, Rogelio
González, F.
Bessa Feixas, Jorge
Document typeArticle
Defense date1970-10
PublisherInstituto de Investigación Textil y Cooperación Industrial
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 2.5 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 2.5 Spain
Abstract
The authors have developed a new technique to study by desorption the equilibrium between polyamidic fibre (polyamide 6) and acid dyes; thanks to this method the equilibrium between the desorbing solution and the dyed fibre is obtained with minimum alteration the concentration of the dye in the fibre and pH of the solution. This technique has enabled a deepening in the desorption mechanism, a fixing of the enormous influence of proton in the process and obtaining better values of thermodynamic magnitudes which govern it. The study of these equilibria has been carried out for ßnaphtalenesulphonic acid as a simple pattern of acid «dye» and for the azo dyes C.I., Acid Orange 7 and C.I. Acid Red 141, both monosulphonic, using as desorbing anions C1¯ for the former and ß-naphltalenesulphonate for both. The values of the equilibrium constants have been calculated for several values of the determining variables and at 3 temperatures in every case, with an accordance which we considerer satisfactory. From the values of the constant, the differences of affinity between fixed anion in the fibre and desorbing anion are calculated, the margin of error always being lower than 1 %, finally arriving at the determination of reactive heat with good results.
CitationCrespo Cereceda, Rufo [et al].Estudio de equilibrios heterogéneos en fibras poliamídicas. Nueva técnica de desorción y su aplicación al ácido ß-naftalensulfónico y colorantes azoicos. Cálculo de afinidades y calores de reacción. Boletín del Instituto de Investigación Textil y de Cooperación Industrial, 1970, nº 44, p. 1-22. 
URIhttp://hdl.handle.net/2099/5933
ISSN1131-6756
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  • Boletín Intexter del Instituto de Investigación Textil y de Cooperación Industrial - 1970, núm. 44 [7]
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