Physico‐chemical Aspects of Textile Coloration

Burkinshaw, S.M.

doi:10.1002/9781118725658

Cited by 97 publications

(288 citation statements)

References 0 publications

Supporting

Mentioning

272

Contrasting

Unclassified

Order By: Relevance

“…During the first stage, the initial dye adsorption rate increased with increasing temperature, which reflected a diffusion controlled process (Table 1). This result is consistent with the known increase in the rate of dye diffusion with temperature [37]. Prior to dye adsorption on the fibre surface, the dye molecules need to diffuse through the external medium to the fibre surface, and then through the diffusional boundary layer present at the fibre surface.…”

Section: The Influence Of Temperature On Dye Adsorptionsupporting

confidence: 89%

“…Prior to dye adsorption on the fibre surface, the dye molecules need to diffuse through the external medium to the fibre surface, and then through the diffusional boundary layer present at the fibre surface. When the external surface of the fibre becomes saturated, the dye molecules diffuse to then adsorb within the fibre interior in Figure 12 The effect of temperature on the adsorption of lac dye on silk yarn coated with MCCh (initial dye concentration 450 mg l À1 , MCCh concentration 1.0% w/v, initial pH of the dye solution 5.46) the final stage of dye adsorption, with this being the ratecontrolling step of the overall dyeing process [37]. The decrease in q t with increasing temperature indicated that the adsorption of lac dye on silk coated with MCCh was controlled by an exothermic process.…”

Section: The Influence Of Temperature On Dye Adsorptionmentioning

confidence: 99%

See 1 more Smart Citation

A kinetic and thermodynamic study of lac dye adsorption on silk yarn coated with microcrystalline chitosan

Chimprasit

Bremner

Danworaphong

et al. 2019

Coloration Technology

View full text Add to dashboard Cite

The coating of silk yarn with microcrystalline chitosan (MCCh) was carried out using the ultrasonic-assisted method at a pulsed wave frequency of 80 kHz, which only had a slight impact on the yarn as measured by changes in Young's modulus and percentage of elongation compared with untreated silk. A significant enhancement of lac dye uptake onto MCCh-coated silk yarn compared with the untreated silk was observed. The rate of dye uptake at different temperatures onto silk yarn coated with MCCh was investigated. It was found that the adsorption rate constant and diffusion coefficient both increased with increasing temperature, as a result of a diffusion kinetically controlled process with a diffusion activation energy of 9.40 kJ mol À1 . This suggests that dye adsorption on silk yarn coated with MCCh is a physisorption process. The free energy change (ΔG ○ ), enthalpy change (ΔH ○ ) and entropy change for dye adsorption were also determined, and the negative values of ΔG ○ and ΔH ○ obtained indicated that the lac dye adsorption process is both spontaneous and exothermic. Coloration Technology Society of Dyers and Colourists 224

show abstract

Section: The Influence Of Temperature On Dye Adsorptionsupporting

confidence: 89%

Section: The Influence Of Temperature On Dye Adsorptionmentioning

confidence: 99%

A kinetic and thermodynamic study of lac dye adsorption on silk yarn coated with microcrystalline chitosan

Chimprasit

Bremner

Danworaphong

et al. 2019

Coloration Technology

View full text Add to dashboard Cite

show abstract

“…The standard affinity of dyeing was calculated:

- Δ {normalμ}^{\circ} = RT ln \frac{{false[D false]}_{f}}{{false[D false]}_{s}} = RT ln K

where −Δμ˚ is the affinity of cochineal molecules to the polyamide fabric (cal mol −1 ), R is the gas constant (1.9872 cal mol −1 K), T is the absolute temperature (K), [ D ] f is the dye concentration in the polyamide fabric (g kg −1 ), [ D ] s is the dye concentration in the solution (g l −1 ) at equilibrium, and K is the partition coefficient of dyeing, obtained from the slope of the plot of [ D ] f vs [ D ] s . K is dimensionless when the solution density is equal to that of the pure solvent .…”

Section: Methodsmentioning

confidence: 99%

“…[D] f is the dye concentration in the polyamide fabric (g kg À1 ), [D] s is the dye concentration in the solution (g l À1 ) at equilibrium, and K is the partition coefficient of dyeing, obtained from the slope of the plot of [D] f vs [D] s . K is dimensionless when the solution density is equal to that of the pure solvent [27].…”

Section: Standard Affinitymentioning

confidence: 99%

Thermodynamic and kinetic studies of the adsorption behaviour of the natural dye cochineal on polyamide 66

Sadeghi‐Kiakhani

Safapour

Mirnezhad

2018

Coloration Technology

View full text Add to dashboard Cite

The adsorption behaviour of the natural dye cochineal on polyamide 66 was studied at different pH values. The thermodynamic and kinetic parameters such as standard affinity (−Δμ˚), changes in enthalpy (ΔH˚) and entropy (ΔS˚), diffusion coefficient and activation energy of the diffusion, were determined for pH values of 3 and 6. Results indicated that the experimental data fitted appropriately with the Nernst isotherm. Furthermore, the partitioning ratio and −Δμ˚ decreased significantly with increasing temperature, and it was revealed that the adsorption of cochineal onto polyamide was an exothermic process. The −Δμ˚ value of polyamide dyed at pH 3 was higher than that dyed at pH 6. This is related to higher numbers of electrostatic and non‐electrostatic interactions between cochineal and polyamide at pH 3, whereas at pH 6 non‐electrostatic hydrophobic interactions between cochineal and polyamide are dominant. At pH 6 comparatively higher negative values for ΔH˚ and ΔS˚ were obtained. The diffusion coefficient increased with rises in temperature. The polyamide dyed at pH 3 had a higher diffusion coefficient at every temperature than the polyamide dyed at pH 6. The dyeing rate for polyamide at pH 3 was higher than at pH 6 and reached equilibrium in a shorter time. Furthermore, a lower activation energy of diffusion was obtained at pH 3 compared to pH 6.

show abstract

“…Cellulosic fibres including cotton develop negative charge in contact with water due to the ionization of hydroxyl and carboxyl groups present in its structure. This negative charge on the fibre surface is responsible for lower affinity of natural dyes towards cotton (Burkinshaw, 2016). Various metallic mordants like salts of copper, iron, chrome, tin etc have been used to improve dye absorption.…”

Section: Introductionmentioning

confidence: 99%

Effect of sericin treatment conditions on dye abilty of cotton fabric

Bhandari

Singh

Rose

2018

JANS

View full text Add to dashboard Cite

Abstract:A study was conducted to observe the effect of sericin treatment on dye abilty of cotton fabric using natural dye. Different parameters for sericin treatment were optimized on the basis of maximum percent dye absorption and washing fastness. It was found that 0.5 % (w/v) sericin in the presence of 4% crosslinking agent and 1 % catalyst treated at 70ºC for 45 minutes followed by drying at 70ºC for 4 minutes and curing at 160ºC for 2 minutes increased affinity of selected natural dye i.e. manjistha towards cotton fabric. Dye uptake of sericin treated fabric increased from 19.5 % to 31.7 % after application of sericin using all the optimized variables.

show abstract

Physico‐chemical Aspects of Textile Coloration

Cited by 97 publications

References 0 publications

A kinetic and thermodynamic study of lac dye adsorption on silk yarn coated with microcrystalline chitosan

A kinetic and thermodynamic study of lac dye adsorption on silk yarn coated with microcrystalline chitosan

Thermodynamic and kinetic studies of the adsorption behaviour of the natural dye cochineal on polyamide 66

Effect of sericin treatment conditions on dye abilty of cotton fabric

Contact Info

Product

Resources

About