• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2002.04a
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• pp.17-20
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• 2002

• Textile Coloration and Finishing
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• v.28 no.3
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• pp.175-182
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• 2016

To investigate dyeing behaviors in accordance with dye structure in cold pad batch dyeing of cotton knit, monochlorotriazine-vinylsulfone bifunctional dyes and monofluorotriazine-vinylsulfone bifunctional dyes were prepared. The spectral property and solubility of the dyes were tested and compared with the imported dyes. In addition, exhaustion behaviors of individual and mixed dye solutions were measured to examine the influence of dye structure on dyeing behavior in cold pad batch dyeing. The substantivity, fixation, migration index and half dyeing time were also calculated for further analysis of dyeing behavior of the prepared dyes. As a result, both dyes exhibited the superior solubilities and satisfactory light absorption properties. Also, monofluorotriazine-vinylsulfone bifunctional dyes showed moderate sensitivity to alkalinity and proper kinetic index values compared with the monochlorotriazine-vinylsulfone bifunctional dyes and the imported dyes. The results indicated monofluorotriazine-vinylsulfone bifunctional structure of the dye is suitable for cold pad batch dyeing.

• Clean Technology
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• v.13 no.3
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• pp.215-221
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• 2007

Biosorption is considered to be a promising alternative to replace the present methods for the treatment of dye-containing wastewater. In this study, sewage sludge was used as a biosorbent which could be one of the cheapest and most abundant biomaterials. The objective of this work is to develop a surface-modified biosorbent with enhanced sorption capacity and binding affinity. The FT-IR and potentiometric titration studies revealed that carboxyl, phosphateand amine groups played a role in binding of dye molecules. The binding sites for reactive dye Reactive Red 4 (RR 4) were identified to be amino groups present in the biomass. In this work, based on the biosorption mechanism, the performance of biosorbentcould be enhanced by the removal of inhibitory carboxyl groups from the biomass for practical application of the biosorbents. As a result, the maximum capacity of biomass was increased up to 130% and 210% of the increment of sorption capacity at pH 2 and 4, respectively. Therefore, chemically modified sewage sludge can be used as an effective and low-cost biosorbent for the removal of dyes from industrial discharges.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2012.03a
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• pp.26-26
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• 2012

The hydrophobic nature of the wool surface give rise to difficult penetration of dye molecules. Among all the methods of modification, graft polymerization is an attractive method to impart a variety of functional groups to a polymer. Grafting has been made by irradiating the light on the polymer in the presence of a solvent containing monomer. The energy source commonly used are high-energy electrons, X-rays, UV and visible light. UV irradiation is a relatively low-energy radiation in comparison with others since it has the least possibility to change bulk properties. In the present paper, a photo-reactive dye was synthesized from quinizarin by the reaction with methacryloyl chloride. The synthesized dye was continuously grafted onto wool fabric at room temperature by UV irradiation. Several key parameters including UV energy, dye concentration and pH have been examined to understand their influence on the photoreactive coloration.

• Journal of Microbiology and Biotechnology
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• v.27 no.1
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• pp.155-160
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• 2017

The dye decolorization rate in a cell-free culture broth of the white-rot fungus Trametes versicolor CBR43 was studied, including the effects of inhibitors of NaCl, Zn(II), and Cd(II) on dye decolorization activity. The maximum rates of dye decolorization in cell-free culture broth were 1,410, 44.7, 41.2, and $0.19{\mu}mol{\cdot}l^{-1}{\cdot}min^{-1}$ for Acid Blue 62, Acid Black 175, Reactive Blue 4, and Acid Red 114, respectively. The inhibition effects of NaCl, Zn(II), and Cd(II) on dye decolorization were quantitatively compared using the half maximal inhibition concentration ($IC_{50}$), which indicates the concentration of an inhibitor required for 50% inhibition. Based on $IC_{50}$ values, dye decolorization in the cell-free culture broth of CBR43 was most potently inhibited by Cd(II), whereas the inhibitory effect of NaCl was relatively low. The dye decolorization rates and $IC_{50}$ data can be used in the design and development of a dye-wastewater treatment process using T. versicolor CBR43 and its operating factors.

• Transactions of the Society of Information Storage Systems
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• v.3 no.4
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• pp.173-177
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• 2007

A photo-reactive methacrylate monomer having triazine as a core component was examined for photochromic diffractive image formation. Photochromic photopolymer films as a recording media contained a monomer mixture of triazine difunctional metharylate (DT) and ethylene glycol phenyl ether acrylate, binder polymer, photo initiator, and a photochromic spiro-oxazine dye. The content of photochromic dye was changed to examine the effect of photochromophore on diffraction efficiency and real holographic image formation. Holographic recording was performed on the photopolymer film by the combination of reference and probe beam. The diffraction efficiency of the photopolymer film in real-time measurement reached a maximum of $\sim90%$ within 30s. It was highly dependent on the photochromophore contents. After holographic recording, the color of the recorded area was changed under UV light (365 nm) and reversibly bleached to original color upon exposure to a visible light source. Films containing only photochromophore without monomer mixture were not reactive under the recording beam (491nm). Diffractive image formation and mechanism of the holographic recording in the presence of photochromophore will be presented.

• Korean Chemical Engineering Research
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• v.50 no.2
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• pp.198-203
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• 2012

Salting-out technique was adopted to crystallize dye crystals from dye solution. In this research solubility of dye solution and crystallization kinetics of Reactive dye (RB-8, RB-49, RR-218) was investigated. The empirical expressions of salting-out crystallization kinetics for Reactive dye (RB-8, RB-49, RR-218) in continuous MSMPR crystallizer was RB-8 in crystal growth kinetics $G=7.1{\times}10^{-4}{\Delta}C^{0.67}$ and nucleation kinetics $B^0=3.1{\times}10^{15}{\Delta}C[1.2{\times}10^{-8}+{\Delta}C^{0.7}M_T{^2}]$, RB-49 in crystal growth kinetics $G=5.2{\times}10^{-4}{\Delta}C^{0.3441}$ and nucleation kinetics $B^0=7.2{\times}10^{15}{\Delta}C[3.3{\times}10^{-8}+({\Delta}C)^{0.7}M_T{^2}]$, RR-218 in crystal growth kinetics $G=4.4{\times}10^{-4}{\Delta}C^{0.2361}$ and nucleation kinetics $B^0=6.3{\times}10^{15}{\Delta}C[7.9{\times}10^{-8}+({\Delta}C)^{0.7}M_T{^2}]$. Also, comparison of calculated crystal size distribution applying to characteristic curve method with experimental crystal size showed good agreement.

• Textile Coloration and Finishing
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• v.16 no.2
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• pp.1-7
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• 2004

The dyeability of cotton fabrics treated with liquid ammonia was investigated using low-temperature and high-temperature reactive dyes. From the results of dyeing rates of direct dye, the inversion time was shown at 600 hours at $40^{\circ}C$, and however it was shown at 10 minutes at $80^{\circ}C$. This was applied to reactive dyeings. In the low-temperature reactive dyes, the color strength of the fabrics treated with liquid ammonia was lower than that of mercerized fabrics. By contrast, in the high-temperature reactive dyes, the color strength of the fabrics treated with liquid ammonia was higher than that of mercerized one.

• Journal of Sericultural and Entomological Science
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• v.27 no.1
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• pp.42-46
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• 1985

Silk fabric was printed with the reactive dye (vinylsulfone type) to investigate the change of adsorption and fixation by steaming time, viscosity of dyeing paste and alkali concentration. It was found that the amount of adsorption and fixation against silk increased with the increase of steaming time, and showed the maximum value at 340cp of dyeing paste. The amount of adsorption and fixation was influenced by alkali concentration. Light, washing, and perspiration fastness were very excellent.

• Journal of the Korean Society of Clothing and Textiles
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• v.23 no.1
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• pp.111-119
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• 1999

가수분해된 네 개의 반응성 염료를 이용하여 견, 양모 나일론 섬유를 염색할 때 영향을 미치는 여러 인자들에 대하여 연구하였다 염의 투입을 가수분해 전과 후로 달리하였을 때 염색된 직물의 K/S 값에 미치는 영향은 염료와 직물의 종류에 따라 각기 달랐으며 염의 영향은 염료의 분자 크기가 클 때 더 크게 나타났다. 이는 염 노동의 증가시 염욕 안에서의염료 용해도가 염료 분자가 클 때 더많은 영향을 받기 때문인 것으로 생각된다. 욕비 증가시에는 염색된 직물의 K/S값은 초기에 감소를 보이다가 높은 욕비에서 K/S값이 증가되었는데 이는 염의 농도의 감소로 인한 영향으로 사료된다. 가수분해된 반응성 염료로 염색된 직물의 수세 견뢰도는 염료의 분자 크기에 의해 영향을 받았으며 직물의 마찰 땀 견괴도는 Gray scale에서 3보다 높았다 본 연구의 결과는 면섬유 염색에 사용한 가수분해된 반응성 염료를 이용하여 견, 양모, 또는 나일론섬유의 염색에 재 사용할 수 있는 가능성을 제시하여 준다.