Dimensionless Groups for the Equilibrium Sorption of Polysulfonated Acid Dyes by Polyamides

Arora, Manpreet S.; McGregor, R.

doi:10.1177/004051759506500703

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…In this paper, the term ‘dyeing theory’ has been used to define the long‐established field of research that has revealed the fundamental behaviour of dyeing processes in terms of the physico‐chemical relationships between dyes and the substrates that absorb them. This was not intended to undervalue the non‐parametric approach that is currently being explored with a view to exerting improved control over the dyeing process, based on neural networks and fuzzy logic [34–40].…”

Section: Discussionmentioning

confidence: 99%

Does dyeing practice need dyeing theory?

Park¹,

Shore

2007

Coloration Technology

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It has been indicated that much of the practical data for dyeing processes available has never been exploited by the dye application industry, although dye research and development programmes have often identified targets with successful outcomes. Products and processes originated by dye makers have had a major impact on the success of practical dyeing, resulting in improved reproducibility and right-first-time processing. Dyeing theory research has consumed substantial resources invested by dye makers and academic institutions, but many of these studies have failed to yield useful data that could be applied directly in practical dyeing systems. The generation of detailed standard operating procedures has provided the conditions for achieving effective control over the practical dyeing process, an objective that was once thought to be attainable eventually by the refinement of dyeing theories.

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Section: Discussionmentioning

confidence: 99%

Does dyeing practice need dyeing theory?

Park¹,

Shore

2007

Coloration Technology

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A Dimensionless Model for the Equilibrium Sorption of Mixtures of Acid Dyes by Polyamides from Finite Dyebaths

Arora

McGregor

1997

Textile Research Journal

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The equations of a dimensionless Donnan model for equilibrium sorption of ions by polymers are applied to sorption data for acid dyes in binary mixtures on nylon 66 fabric. The two acid dyes are commercial samples of C.I. Acid Blue 25 and C.I. Acid Yellow 49. Excellent fits of the data to the dimensionless model are obtained. The ratio of the distribution coefficients of the two dyes in the mixtures is estimated. Dimensionless sorption parameters have a linear dependence on the initial dye concentrations in the finite dyebaths and a linear dependence on the initial salt concentration. The equilibrium concentration distribution ratios of the two dyes on the fabric are linearly related to the ratios of their initial dyebath concentrations.

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Effect of Salts on Physical Interactions in Wool Dyeing with Acid Dyes

Yang

1998

Textile Research Journal

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The modified Donnan model, which considers the dye distribution coefficient as a function of salt concentration and property in the dyebath, is used to describe the dyeing behavior of wool with acid dyes and different kinds of salts. This modification is based on the understanding that salt anions are either kosmotropes (water-structure maker) or chaotropes (water-structure breaker). They affect the free energy of the dyebath through their influence on water structures. As is well known, adding salt to the dyebath decreases dye sorption due to its reduction of ionic attraction between negatively charged acid dyes and positively charged wool fibers. However, adding some salts such as sulfate and dihydrogen phosphate can increase dye sorption if the salt concentration is high. This phenomenon cannot be explained by the classic theory of salt functions in dyeing. The modified Donnan model is used to explain quantitatively both the de crease and increase of acid dye sorption on wool with increasing salt concentration.

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Dimensionless Groups for the Equilibrium Sorption of Polysulfonated Acid Dyes by Polyamides

Cited by 3 publications

References 8 publications

Does dyeing practice need dyeing theory?

Does dyeing practice need dyeing theory?

A Dimensionless Model for the Equilibrium Sorption of Mixtures of Acid Dyes by Polyamides from Finite Dyebaths

Effect of Salts on Physical Interactions in Wool Dyeing with Acid Dyes

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