• Textile Coloration and Finishing
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• v.3 no.3
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• pp.34-43
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• 1991

The dyeing property of milling type acid dyes with various chemical constitution were studied in one bath dyeing of Wool/Nylon blended fabrics and the proper dyeing condition to get solid color by using reserving agent was also examined. The result of the experiments can be summarized as follows; 1) Although the effect of pH on dyeing of wool with a highly hydrophiilic dye is great in the dyeing of wool and nylon, the proper pH of dyeing bath is weakly acidic 5, in which levelling dye can be obtained by increasing the solubility product. 2) Under a constant pH, the dye with fewer numbers of sulfonic acid groups increases the dyeing amount of nylon as the concentration of the dye is increased. Thus the appropriate dye for light color is the one with many numbers of sulfonic acid groups and the proper dye for medium and deep color is of fewer sulfonic acid groups for one-bath dyeing. 3) When the dye concentration is greater than the critical depth, the K/S value of wool and nylon was almost not effected or slightly increased.

• Advances in environmental research
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• v.4 no.1
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• pp.25-38
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• 2015

Wastewaters of textile industry cause high volume colour and harmful substance pollutions. Photocatalytic degradation is a method which gives opportunity of reduction of organic pollutants such as dye containing wastewaters. In this study, photocatalytic degradation of C.I. Basic Yellow 28 (BY28) as a model dye contaminant was carried out using Degussa P25 in a photocatalytic reactor. The experiments were followed out at three different azo dye concentrations in a reactor equipped UV-A lamp (365 nm) as a light source. Azo dye removal efficiencies were examined with total organic carbon and UV-vis measurements. As a result of experiments, maximum degradation efficiency was obtained as 100% at BY28 concentration of $50mgL^{-1}$ for the reaction time of 2.5 h. The photodegradation of BY28 was described by a pseudo-first-order kinetic model modified with the langmuir-Hinshelwood mechanism. The adsorption equilibrium constant and the rate constant of the surface reaction were calculated as $K_{dye}=6.689{\cdot}10^{-2}L\;mg^{-1}$ and $k_c=0.599mg\;L^{-1}min^{-1}$, respectively.

• Advances in environmental research
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• v.9 no.2
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• pp.85-95
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• 2020

In this study, the decolorization of Evercion Blue P-GR (EBP) and Ostazin Black H-GRN (OBH) was investigated using white-rot fungi named as Trametes versicolor (T. versicolor) by Membrane Bioreactor (MBR) system. This study involved experiments employing synthetic textile wastewater in Membrane Bioreactor (MBR) system (170 ml), initially inoculated with a pure culture of fungi, but operated, other than controlling pH (4.5±0.2) and temperature (25±1℃), under non-sterile conditions. The effect of dye concentrations on fungal biodegradation was also investigated. The decolorization efficiencies were 98%, 90%, and 87% respectively, for EBP when the initial dye concentration of 50, 100, and 200 mg L^-1 were used. However, the decolorization percentages for OBH dye were obtained 95% for 50 mg L^-1 dye solution in 2 days and 66% for 100 mg L^-1 dye solution in 5 days. Possible interactions between dye molecules and the fungal surface were confirmed by SEM, EDX, and FTIR analyses.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2008.10a
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• pp.15-16
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• 2008

A mixed bi-functional reactive dye has been applied to the cotton and the hemp, their dyeing and fastness were properties compared. Hemp exhibited better dyeability than cotton and this result was explained by the differences in the supramolecular structure of these two fibers.

• Fashion & Textile Research Journal
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• v.23 no.6
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• pp.844-851
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• 2021

Due to the increase in consumers' interest about well-being, interest in eco-friendly products has been increasing due to the harmful effects of various harmful substances contained in textile products and environmental issues. As a result, natural dyes of less potential risk than synthetic dyes and digital textile printing(DTP) textile products with less environmental pollution are drawing attention. However, due to the lack of evaluation criteria for DTP textile products with natural ink and the nature of many colors are stacked layer by layer for dying, the need for simultaneous analysis is emerging. To evaluate whether the natural dye is derived from natural ingredients, the biocarbon content is analyzed. However, in the case of ink made using natural dyes and DTP textile products using natural ink, it is difficult to analyze the biocarbon content due to the limitation of the presence of a small amount of dye contained therein. In this study, we were shown the possibility of natural derived verification by cross-checking the analytes of natural dyes (Persicaria tinctoria, an indigo dye; Dactylopius coccus, a light red; and Curcum longa L., i.e., turmeric) and natural ink with HPLC-MS/MS. The coefficient of determination was 0.999 or higher, the limit of quantification was 0.647-3.664 ㎍/L and a %RSD of each indicator material was less than 10. Then, the extraction amount of natural dyes for five patterned fabrics was analyzed.

• Textile Coloration and Finishing
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• v.20 no.5
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• pp.35-40
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• 2008

Dyeing and washing fastness properties of polyurethane-impregnated polyester (PU-impregnated PET), and the distribution of two disperse dyes between PET and PU film were studied to investigate the effect of PU portion to exhaustion and washing fastness. Dyeing properties of PU-impregnated PET were quite different with those of PET: PU-impregnated PET absorbed disperse dye linearly from the early stage of dyeing to equilibrium, and it exhibited excellent build-up property up to 4 %owf dyeing. The absorbed dye on PU film at early dyeing stage migrated to more substantive PET at the temperature higher than $115^{\circ}C$. The amount of exhausted dye on PET portion was larger than on PU film and the distribution ratio was $2.08{\sim}2.34$. The grade of washing fastness of PU-impregnated PET was the same as or lower by $0.5{\sim}1$ grade than PU film whose washing fastness was lower by $0.5{\sim}1$ than PET.

• Textile Coloration and Finishing
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• v.8 no.1
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• pp.26-33
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• 1996

The berberine from Amur cork tree is natural yellow dye and can be extracted more easily by water. The berberine is basic dye and was extracted at 90-95$^{\circ}C$. We have obtained the following results; 1. K/S value in the abstract of dye was increased by time-elapsing, but the reasonable time was between 90-120min. 2. The reasonable weight of Amur cork tree in the abstract of dye was between 10-20 g/L. 3. We obtained various colors in case of using mordants. ―In case of 10g/L and 20g/l, the reasonable value of mordant was 5-10%(owf). and in case of using tannic acid and $FeSO_{4}$ we could obtain high K/S value. 4. &{\lambda}_{max}& of UV spectra was shown 420nm. 5. Genarally fastness of drycleaning indicated more than grade 4. but it of perspiration was more stable in acid than alkali.

• Textile Coloration and Finishing
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• v.26 no.3
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• pp.272-276
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• 2014

The functional materials have been developed as a promising research topic toward the end uses for organic materials and applications. In this study, fluorescein based dye was synthesized by three step reaction. We have designed and synthesized the colorimetric dye through the reactions of fluorescein and methoxy group and ethylene diamine and squaric acid. The structure of the non-fluorescent spirolactam was elucidated by $^1H$-NMR, LC-Mass and FT-IR analyzes. Further studies are in progress to understand the effects of various substituent during the recognition process and to develop fluorescein based sensors for cations or anions.

• Textile Coloration and Finishing
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• v.25 no.3
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• pp.165-171
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• 2013

A new monoazo violet dye optimized for polyolefin fibers such as polypropylene and ultra high molecular weight polyethylene fibers was synthesized and its dyeability was investigated. Two hexyl groups were introduced to coupler, 2,5-dimethoxyaniline, in order to increase hydrophobicity of the dye. The maximum absorption wavelength was appeared at 580nm, which meant that the dye showed violet color. From the dyeing results at various conditions, the optimum dyeing was determined as $130^{\circ}C$ for 1 hour with 5% owf of dyes. The good fastness ratings to washing, rubbing were obtained showing at least 4 for both fibers. Light fastness was acceptable for polypropylene fibers giving ratings 3~4. However, relatively poor light fastness was obtained in case of ultra high molecular weight polyethylene fibers showing ratings 2.

• Textile Coloration and Finishing
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• v.20 no.2
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• pp.53-58
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• 2008

New dyeable PP fiber and several products from it has been developed through dispersing polyester copolymer into PP resin by a Korean synthetic fiber manufacturer and its colleagues. The dyeing properties of PET/dyeable PP double knit fabric were examined with three different types of disperse dye in this study. It was found that the disperse dye, exhausted on dyeable PP at early stage of dyeing, migrated to PET at elevated dyeing temperature when two fibers were dyed in the same dye bath. The ratios of dye distribution between two substrates dyed at $120^{\circ}C$ and $130^{\circ}C$ showed no difference. S type disperse dyes showed good build-up properties and acceptable color fastness while high light fastness type exhibited the lowest amounts of exhaustion but excellent color fastness. It might be concluded that the most appropriate dye for PET/dyeable PP double knit fabric was S type, and that some color difference between PET side and dyeable PP side was unvoidable.