• ETRI Journal
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• v.27 no.3
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• pp.319-325
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• 2005

In this paper the effect of temperature on the electrical properties of organic semiconductor disperse orange dye 25 (OD) have been examined. Thin films of OD have been deposited on $In_{2}O_{3}$ substrates using a centrifugal machine. DC current-voltage (I-V) characteristics of the fabricated devices $(Al/OD/In_{2}O_{3)$ have been evaluated at varying temperatures ranging from 40 to $60^{\circ}C$. A rectification behavior in these devices has been observed such that the rectifying ratio increases as a function of temperature. I-V characteristics observed in $Al/OD/In_{2}O_{3)$ devices have been classified as low temperature $({\leq} 50^{\circ}C)$ and high temperature characteristics (approximately $60^{\circ}C$). Low temperature characteristics have been explained on the basis of the charge transport mechanism associated with free carriers available in OD, whereas high temperature characteristics have been explained on the basis of the trapped space-charge-limited current. Different electrical parameters such as traps factor, free carrier density, trapped carrier density, trap density of states, and effective mobility have been determined from the observed temperature dependent I-V characteristics. It has been shown that the traps factor, effective mobility, and free carrier density increase with increasing values of temperature, whilst no significant change has been observed in the trap density of states.

• Textile Coloration and Finishing
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• v.30 no.4
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• pp.275-287
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• 2018

In recent years, research on the development of eco-friendly synthetic suede based on water-dispersed polyurethane resin and non-fluorine water repellent has been conducted. Synthetic suede has a problem that the fastness to dyeing is greatly lowered after the water-repellent processing at a high temperature of $160^{\circ}C$ because the polyester is dyed with a disperse dye. Therefore, in this study, silica was added to water-dispersed polyurethane resin to improve dye fastness. To distribute the $PUD-SiO_2$ mixture evenly in the water-dispersed polyurethane resin, sufficient stirring was done for a period of time. When the $PUD-SiO_2$ mixture(PUD 1-5%) is applied to the substrate, it is confirmed through SEM that the mixture is uniformly applied without particle condensation. The results showed that silica with a diameter of 4~12nm and BET of $200{\sim}380g/m^2$ had the ability to improve dispersibility and fastness.

• Proceedings of the Korean Environmental Health Society Conference
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• 2005.12a
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• pp.95-102
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• 2005

For decolorization of synthetic dyes, Isolate fungi were investigated for the decolorization of 8 industrial dyes. One fungus isolated from textile wastewater collected from Banweol industrial complex, Korea showed excellent ability for removing synthetic dyes. Internal Transcribed Spacers (ITS) sequencing result was confirmed as the new Basidomycetes species. HUE05-1 The optimal decolorizaton conditions were pH5, 30$^{\circ}C$ and aerobic condition. HUE05-1 was completely decolorized all dyes in both solid and liquid condition. The result is decolorization effect at Reactive Orange 16; 97.12%, Reactive Blue 19; 92.09%, Reactive Blue 49; 97.04%, Reactive Yellow 145; 95.53%, Acid Orange 10; 99.18%, Acid Violet 43; 98.73%, Acid Blue 350; 94.71%, Disperse Blue 106; 90.07%.

• Textile Coloration and Finishing
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• v.13 no.3
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• pp.197-202
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• 2001

The mechanical properties and dyeability of Poly(trimethylene terephthalate)(PTT) were investigated and compared to PET. Glass transition temperature of PTT was lower than that of PET, because amorphous region of PTT is mote flexible. n has smaller molecular and specific stress and larger strain than those of PET, due to the difference of molecular structure. Dyeing transition temperature of PTT was lower by $20^\circ{C}$ than that of PET. Because PTT has flexible chain and zigzag structure, dyeing Fate of PTT is faster than PET and dyeing of PTT is begun at lower temperature. As the hydrophobicity of disperse dyes increased, the ratio of equilibrium dye uptake on PTT to that on PET was increased.

• Textile Coloration and Finishing
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• v.21 no.3
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• pp.37-42
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• 2009

The low melting PET yarn has sheath/core structure: sheath portion consists of low melting point PET and core portion is regular PET. Dyeing properties of fabric made from low melting PET yarn were investigated at different dyeing temperatures. It was found that the exhaustion yield on the low melting PET fabric was higher than on regular PET fabric. The total K/S value of the dyed low melting PET fabric increased as heat setting temperature increased above $150^{\circ}C$ because the sheath portion of the low melting yarn melted. Although fastness to light of the low melting PET fabric was similar to regular PET fabric, fastness to washing was inferior to regular PET fabric by 1 grade.

• Textile Coloration and Finishing
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• v.31 no.4
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• pp.258-267
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• 2019

Synthetic suede without PFCs(perfluorinated compounds) are followed by subsequent high temperature treatment. But migration fastness of synthetic suede may be reduced due to sublimation of disperse dyes that results from the high temperature treatment. Therefore, in this study, chitosan treatment was used to improve the migration fastness before polyurethane dipping process. Polyester fiber was treated with sodium hydroxide aqueous solution before chitosan processing. This samples treated with a chitosan concentration upto 0.5% were dyed and coated with PUD(polyurethane dispersion). The migration fastness was most improved at 0.35% application. This is presumably due to the fact that the chitosan may increase the dye-binding capability through intermolecular hydrogen bonding.

• Fashion & Textile Research Journal
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• v.5 no.5
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• pp.545-549
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• 2003

Dyeing properties such as migration of disperse dye and color fastness of 4 types of the carrier[Carrier-I(methyl napthalene). Carrier-II(chloro benzene). Carrier-III(aromatic ether) and Carrier-IV(o-phenyl phenol)] were evaluated for the study. For the results, the optimum dyeing time and concentration of the carrier was 30min at $110^{\circ}C$ and 2g/l, respectively. The redyeing ratio of the fabric samples treated with Carrier-II and III was higher than that treated with Carrier-I and IV, thus, if was conclude that the redyeing ratio of the samples treated with Carrier-II and III was excellent. The light fastness of the samples treated with Carrier-III and IV was higher than that of Carrier-I and II in order of 2-4 grades. However, there were little changes in terms of washing and sublimation and rubbing fastness for the samples.

• Textile Coloration and Finishing
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• v.7 no.3
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• pp.53-59
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• 1995

In foam dyebath assisted with and without solvent (iso-propylacohol) for polyester and polyester(30%)/nylon(70%) (P3/N7) nonwoven fabrics, adsorption behavior of polyester and P3/N7 nonwovens dyed with C.I. Disperse Red 4 (Red 4), C.I. Acid Violet 54(Violet 54) and Red 4/Violet 54 were investigated by determining the K/S value. The K/S values of polyester and P3/N7 nonwovens in the foam dyeing was greatly enchanced by adding the iso-propylalcohol, but these values were not higher than the carrier dyeing. Dyeabilities of polyester/nylon blended nonwoven fabrics to Red 4, Violet 54 and Red 4/Violet 54 in the foam dyeing were influenced by the affinity of dye to fiber.

• Textile Coloration and Finishing
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• v.9 no.5
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• pp.63-74
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• 1997

Polyurethane microcapsules were synthesized by interfacial polymerization in an aqueous poly(ethylene glycol) dispersion with ethylenediamine as chain extender of toluene diisocyanate in perfume oil using poly(vinyl alcohol) as the stabilizing agent. The effect of chemical structure on the average particle size and distributions, morphologies, and thermal properties to design microcapsules for the sustained release system was investigated. It came to be known that polyurethane microcapsules with ethylene diamine as chain extender had a rounder, more permeable and controlled release membranes. And the release test of polyurethane microcapsules with different soft segment content was done to certify the effect of long methylene chain. According to the higher molecular weight of polyether polyol, the release rate of microencapsulated disperse dye molecular was faster.

• Journal of the Korean Graphic Arts Communication Society
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• v.24 no.2
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• pp.35-48
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• 2006

Textile decalcomania printing is how after the disperse dye which is melting and vaporizing absorbs on the surface of the cloth, it colors by permeating into the cloth inside. So it has applied a lot to the synthetic fiber like polyester. However, because there is no showing right temperature and time in case of printing on the polyester fiber and the microfiber, this study aims at it. The experimental methods are like this : first measuring the density for the objective judgment, and measuring colors with the colorimeter, and then study for the color reproduction through a visual evaluation.