Supercritical Fluid Spray Dyeing: A New Method of Dyeing and Simulations of its Flow Field

Wang, Ming Lu; Wang, Wei Qiang; Yan, Qingzeng; Liu, Yan; Xu, Zhi Yong

doi:10.4028/www.scientific.net/amr.396-398.2038

Cited by 4 publications

(5 citation statements)

References 11 publications

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“…The first novel technology is supercritical fluid spray dyeing . The use of supercritical or liquid CO 2 as a medium for delivering coating systems has already been adopted or proposed in many areas, such as metals, pharmaceuticals, food, leather coatings, etc.…”

Section: The Technology Of the Supercritical Dyeing Process – A Focusmentioning

confidence: 99%

“…. Wang and co‐workers have proposed that it be could adopted for supercritical dyeing and that this would solve some of the problems connected to the high‐pressure operation of the typical process configuration . The core of the process consists of a dye‐dissolving scCO 2 stream jetting from a nozzle through a textile continuously moving along its process route.…”

Section: The Technology Of the Supercritical Dyeing Process – A Focusmentioning

confidence: 99%

“…The pressure of the fluid drops and the textile is dyed when the supercritical stream passes through it. Afterwards, the scCO 2 transforms into a gas phase and, together with the remaining dye, enters the fluid collector to be recovered and recycled . At the moment, only promising theoretical calculations related to temperature and pressure profiles in the scCO 2 stream have been published .…”

Section: The Technology Of the Supercritical Dyeing Process – A Focusmentioning

confidence: 99%

See 2 more Smart Citations

Supercritical fluid dyeing of synthetic and natural textiles – a review

Banchero

2012

Coloration Technology

161

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Supercritical fluid dyeing is an interesting alternative to the conventional aqueous process because of its environmental benefits. The aim of the paper is to provide the reader with an up‐to‐date overview of this subject, covering various aspects, such as the solubility and equilibrium partitioning of the dyes, mass transfer phenomena and solvent–polymer interactions occurring during coloration, up to the most recent reports on the technology of the dyeing process. Even though the best results have been obtained in the coloration of synthetic textiles, particular attention is given to the dyeing of natural textiles, which is, at the moment, the limiting step of this technology.

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Section: The Technology Of the Supercritical Dyeing Process – A Focusmentioning

confidence: 99%

Section: The Technology Of the Supercritical Dyeing Process – A Focusmentioning

confidence: 99%

Section: The Technology Of the Supercritical Dyeing Process – A Focusmentioning

confidence: 99%

See 1 more Smart Citation

Supercritical fluid dyeing of synthetic and natural textiles – a review

Banchero

2012

Coloration Technology

161

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“…Studies to minimize salt and water consumption in dyeing processes include applying enzymatic processes in fabric preparation, using biodegradable organic salts and different surface modifications of cotton [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Sustainable Dyeing and Finishing of Cotton Fabrics with Layer-by-Layer Technique

Uğur

2023

Coatings

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Large amounts of water, synthetic dyestuffs and chemicals are used in the wet processes of textile finishing, and at the end of these processes, liquors containing chemical substances create a waste load. For this reason, it is of great importance to develop new wet-finishing processes that use less water, dyestuffs and chemicals. For this purpose, the layer-by-layer deposition method (LbL) was used in this research as an environmentally friendly, sustainable method that can be used in wet-finishing processes to minimize chemical, water and energy consumption. The dyeing and functional finishing of cotton fabrics were carried out in one process by the LbL method. Cotton fabrics were pre-treated with a commercial cationic dye fixation agent and cationic charges were produced on the fabric surfaces. Reactive and direct dyestuff groups were used in the dyeing process of cotton fabrics and fluorocarbon was used in the functional finishing process. Eight and 12 dye/fluorocarbon layered structures were obtained by LbL deposition using a laboratory-type padder. Cotton fabrics were dyed and finished with the same dyes and fluorocarbon via the padding method and both samples were compared. The washing, rubbing and light color fastness properties, color strength and color difference of the dyed samples were tested. Tensile strength, air permeability, SEM graphs, contact angle, water and oil repellency analyses were performed for the treated fabrics.

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“…Supercritical CO 2 dyeing is an eco-friendly dyeing technology that uses CO 2 instead of water as a dye carrier [13]. Wang and others [14][15][16] proposed supercritical CO 2 spray dyeing technology, that can realize large-volume continuous dyeing without high-temperature and high-pressure equipment, thus shortening the dyeing time and improving the dyeing efficiency. However, cotton fabric directly sprayed by the sprayer is easily damaged due to the continuous impact of the nozzle.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Reactive Red 120 in Decamethyl-Cyclopentasiloxane Non-Aqueous Dyeing System

et al. 2023

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Traditional dyeing usually consumes a significant amount of water and salts, thus causing environmental pollution. Salt-free and low-water dyeing has become an important research direction in the cotton fabric dyeing industry. The non-aqueous media dyeing technology, using decamethylcyclopentasiloxane (D5) as the dyeing medium, has achieved energy saving and emission reduction in this industry. To investigate the influence of inorganic salts on the dyeing properties of reactive dyes in a non-aqueous medium dyeing system, the adsorption kinetics and level dyeing property of C.I. Reactive Red 120 were investigated at various concentrations of sodium sulfate. When no salts were included in the siloxane non-aqueous dyeing system, 80% of the reactive dye could diffuse onto the cotton fabric surface after 10 min. However, if 13% salts were added during dyeing, 87% of the reactive dye could diffuse to cotton fabric surface over the same amount of time. Moreover, the adsorption rate of dye was increased from 3.85 mg/g·min to 5.04 mg/g·min when the quantity of salts was increased from 0% to 13%. However, the concentration of sodium sulfate had minimal effect on the color depth of the dyed fabric and the final uptake of dye. But, when the concentration of sodium sulfate was significant, the level dyeing property of the dye became poor as the Sγ(λ) value was increased from 0.020 to 0.042. The adsorption kinetic of C.I. Reactive Red 120 in D5 dyeing solution may be best described by the pseudo-second-order kinetic model. As the sodium sulfate concentration increases, the half-dyeing time gradually decreases and the adsorption rate of dye increases. The repulsive force between the dye and the cotton fiber was lowered by the addition of sodium sulfate. Consequently, in the D5 dyeing system, the level dyeing property of reactive dye may be affected by the adsorption rate. Therefore, the formula of reactive dyes that do not contain salts can be applied successfully in non-aqueous dyeing systems.

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Supercritical Fluid Spray Dyeing: A New Method of Dyeing and Simulations of its Flow Field

Cited by 4 publications

References 11 publications

Supercritical fluid dyeing of synthetic and natural textiles – a review

Supercritical fluid dyeing of synthetic and natural textiles – a review

Sustainable Dyeing and Finishing of Cotton Fabrics with Layer-by-Layer Technique

Adsorption of Reactive Red 120 in Decamethyl-Cyclopentasiloxane Non-Aqueous Dyeing System

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