Thermodynamics of Wool Dyeing

Atav, Rıza

doi:10.5772/51618

Cited by 5 publications

(2 citation statements)

References 18 publications

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“…Los mordientes actúan como sustancias que ayudan a fijar el colorante en la fibra y a modificar el pH del baño de teñido (Jung y Bae, 2014). Las moléculas de mordientes disueltas en la disolución se adhieren a la superficie y se difunden a las zonas internas (corteza y médula) de las fibras, modificando su volumen y diámetro (Atav, 2012). El posmordentado con alumbre hace que formen iones de aluminio (Al + ) que se fijan a las moléculas de la superficie (cutícula y capa F) de la fibra mediante enlaces iónicos; las moléculas del ácido oxálico se fijan mediante enlaces covalentes y las moléculas de sulfato de sodio se fijan mediante enlaces iónicos y covalentes (Mathur y Gupta, 2003) Al usar los mordientes se disminuye significativamente la calidad del DMF y la FH de los hilos en comparación con el hilo teñido sin mordiente y la fibra blanca; esto debido a que las moléculas del colorante y mordiente disuelto ingresan mediante los poros a la corteza y la médula de la fibra, de modo que al secarse (el agua se evapora) solo quedan las moléculas del colorante y mordientes en el interior de las fibras.…”

Section: Resultados Y Discusiónunclassified

Efecto de mordientes sobre la variación de diámetro y tono de color en hilos de fibra de alpaca teñidos con flores de colli (Buddleja coriacea)

Lozano,

Quispe-Quispe,

Vilcanqui-Pérez

2024

Rev. investig. vet. Perú

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The aim of this study was to evaluate the effect of mordants on the variation of mean fibre diameter (MFD), spinning fineness (SF), and colour tone in alpaca fibre threads dyed with colli flowers (Buddleja coriacea). The dye was extracted using boiling water, followed by immersion of the thread in 160 ml of extract and post-mordanting with collpa, alum, and lemon salt at boiling temperature. MFD was measured using S-Fiber Med equipment. Colorimetry parameters were obtained using a spectrometer, and FT-IR spectrophotometer was used for identification of functional groups. MFD in colli-dyed and post-mordanted threads significantly increased with the addition of mordants, with the highest change observed with lemon salt (30.09 μm). The same trend was observed for SF. Dyeing with colli flower extract and subsequent mordant application produced different shades and hues of yellow colour in alpaca thread with significant variations in colorimetry parameters and FT-IR spectrum intensity. The reflectance spectrum R (%) showed a typical yellow colour curve with small differences in intensity due to the mordants used. In conclusion, MFD in colli-dyed thread increased by 0.44 µm; collpa mordanted by 2.78 µm; alum by 3.31 µm, and lemon salt by 3.51 µm compared to white thread, also producing different shades and hues of yellow colour with significant variations in colorimetry parameters and K/S. The sample dyed with colli without mordant presented the highest intensity, and lower intensity was observed in post-mordanted samples in FT-IR.

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Section: Resultados Y Discusiónunclassified

Efecto de mordientes sobre la variación de diámetro y tono de color en hilos de fibra de alpaca teñidos con flores de colli (Buddleja coriacea)

Lozano,

Quispe-Quispe,

Vilcanqui-Pérez

2024

Rev. investig. vet. Perú

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“…This phenomenon is most evident at an early stage of dye diffusion. Despite variations seen in amino acid content in different breeds of wool, it has been observed that at equilibrium conditions, there is very little difference in the amount of acid dye uptake among wool fibers obtained from different breeds of sheep. , However, the reported merino wool fibers were dyed at lower concentration, and to investigate the maximum dye sorption capacity of a new breed of wool fiber, it is required to dye the fiber at higher dye concentrations and temperatures. This could highlight differential dyeing due to presence of different types of scale structure on the surface of the fiber …”

Section: Introductionmentioning

confidence: 99%

Investigation of the Thermodynamic and Kinetic Behavior of Acid Dyes in Relation to Wool Fiber Morphology

Paul,

Hewitt,

Rana

et al. 2024

ACS Omega

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Wool fibers from several different sheep breeds in the UK have very limited applications. The main aim of this study was to establish an understanding of the dye sorption properties of different wool fibers through thermodynamics and kinetics of dyeing using Acid Red 1 dye. Wool fibers from Leicester, Ryeland, and Dartmoor sheep breeds were pretreated (to remove impurities) and dyed using Acid Red 1. Leicester showed 7% higher dye exhaustion than Dartmoor wool fibers (20% on mass of fiber). Dyeing equilibrium results for both Leicester and Dartmoor wool fibers were fitted to Langmuir and Freundlich isotherms, and the theoretical maximum sorption capacities were 164 and 144 mg g −1 , respectively. Leicester, Ryeland, and Dartmoor also followed the pseudo-second-order reaction kinetics. Thermodynamic parameters like Gibb's free energy (ΔG°) and standard affinity (Δμ°) of the fibers were calculated to understand the interaction of the Acid Red 1 with wool fibers. The difference in dye uptake was explained through the possible involvement of the scale opening gap (surface morphology) of the wool fibers.

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Simultaneous Synthesis of Silver Nanoparticles and Natural Indigo Dyeing of Wool Fiber

Barani

2019

J Inorg Organomet Polym

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Thermodynamics of Wool Dyeing

Cited by 5 publications

References 18 publications

Efecto de mordientes sobre la variación de diámetro y tono de color en hilos de fibra de alpaca teñidos con flores de colli (Buddleja coriacea)

Efecto de mordientes sobre la variación de diámetro y tono de color en hilos de fibra de alpaca teñidos con flores de colli (Buddleja coriacea)

Investigation of the Thermodynamic and Kinetic Behavior of Acid Dyes in Relation to Wool Fiber Morphology

Simultaneous Synthesis of Silver Nanoparticles and Natural Indigo Dyeing of Wool Fiber

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