• Title, Summary, Keyword: Dye

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Dyeing and Fastness Properties of a Reactive Disperse Dye on PET, Nylon, Silk and N/P Fabrics

  • Bae Jin-Seok;Park Jong-Ho;Koh Joon-Seok;Kim Sung-Dong
    • Fibers and Polymers
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    • v.7 no.2
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    • pp.174-179
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    • 2006
  • Dyeing and color fastness properties of a reactive disperse dye containing an acetoxyethylsulphone group on PET, Nylon, silk and N/P fabrics were examined. The reactive disperse dye exhibited almost the same dyeing properties on PET fabric as a conventional disperse dye except the level of dye uptake. The most appropriate pH and dyeing temperature for the dyeing of Nylon fabric were 7 and $100^{\circ}C$ respectively. The build-up on Nylon fabric was good and various color fastnesses were good to excellent due to the formation of the covalent bond. Application of the reactive disperse dye on silk fabric at pH 9 and $80^{\circ}C$ yielded optimum color strength. The rate of dyeing on Nylon fabric was faster than that on PET fabric when both fabrics were dyed simultaneously in a dye bath, accordingly color strength of the dyed Nylon was higher. The reactive disperse dye can be applied for one-step and one-bath dyeing of N/P mixture fabric with good color fastness.

Study on the Natural Dye Program in Gyeongsang Region (경상도 지역 천연염색 프로그램에 관한 연구)

  • Lee, Je Nam;Lee, Eun Jin
    • Fashion & Textile Research Journal
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    • v.19 no.2
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    • pp.140-151
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    • 2017
  • This study researched the status and prospect of the natural dye program in the Gyeongsang region, with a focus on private centers with sufficient infrastructure and abundant human resources available for natural dyes. Metropolitan cities do not own the drying house and the agricultural land for natural dyes as well as have difficulty securing the land; therefore, entire sites are limited and smaller as they are closer to the city. The one-time program of all centers has been researched to help promote and maintain centers rather than generate profit. It is shown that June-August (summer) is preferred over December-February (winter). Natural dye programs for hobby and education are operated as needed because the number of participants are low. This program uses natural indigo and Persimmon Juice for the dyeing raw materials. Programs are often outsourced by other institutes with a private certification registration system the starting of a business after obtaining certification are often found in institutes operating programs directly. Future plans do not include investments in facilities (like the enlargement of experience centers) the prospect of programs and business value is bright for business strategies that include an exhibition shop for natural dye products and program development.

Synthesis and Photovoltaic Performance of NIR Absorption Dyes for the Dye Sensitized Solar Cell (NIR 흡수 염료를 이용한 염료감응형 태양전지)

  • Kim, Sangah;Jung, Miran;Lee, Minkyung;Kim, Jaehong
    • 한국신재생에너지학회:학술대회논문집
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    • pp.118.1-118.1
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    • 2011
  • The dye-sensitized solar cell (DSSC) is a device for the conversion of visible light into electricity, based on the sensitization of wide bandgap semiconductors. The performance of the cell mainly depends on a dye used as sensitizer. The absorption spectrum of the dye and the anchorage of the dye to the surface of TiO2 are important parameters determining the efficiency of the cell. Generally, transition metal coordination compounds(ruthenium polypyridyl complexes) are used as the effective sensitizers, due to their intense charge-transfer absorption in the whole visible range and highly efficient metal-to ligand charge transfer. However, ruthenium polypyridyl complexes contain a heavy metal, which is undesirable from point of view of the environmental aspects. Moreover, the process to synthesize the complexes is complicated and costly. Alternatively, organic dyes can be used for the same purpose with an acceptable efficiency. The advantages of organic dyes include their availability and low cost. We designed and synthesized a series of organic sensitizers containing long wavelength absorption-chromophores for the dye sensitized solar cell. The DSSC composed of Blue-chromophores for the sensitization absorbed long wavelength region which is different also applied into the dye-cocktail (mixing) system. The photovoltaic property of DSSCs organic long wavelength absorption-chromophores were measured and evaluated by comparison with that of individual chromophores.

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Natural Indigo Dyeing of Wool by the One Step Reduction/Dyeing Method (일단계 환원/염색에 의한 모직물의 천연인디고 염색)

  • Son, Kyung-Hee;Shin, Youn-Sook;Yoo, Dong-Il
    • Journal of the Korean Society of Clothing and Textiles
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    • v.34 no.3
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    • pp.508-517
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    • 2010
  • One-step reduction/dyeing method was optimized for wool dyeing with natural indigo dye in this study. The effects of reduction/dyeing conditions including dye temperature and time, the pH of bath, concentration of dye, and reducing agent on dye uptake and color were investigated. The dye uptake was higher with no addition of alkali. Dyeing was carried out through the use of only sodium hydrosulfite in the bath. The maximum dye uptake was obtained at $60^{\circ}C$ for 30min and the dyed fabrics appeared in the PB Munsell color range. Dye uptake improved with the increase of a natural indigo dye concentration with the same sodium hydrosulfite concentration. At a higher dye uptake, the fabric color became more purplish and the maximum absorption shifted from 660nm to 620nm. Color reproducibility was reliable with a color difference in the range of 0.41~1.43. Regardless of color strength, washing and dry cleaning fastnesses were good with a 4/5 rating, and fastnesses to rubbing and light were acceptable with a 3/4~4 rating.

Synthesis and Photovoltaic Performance of Long Wavelength Absorption Dyes for the Dye Sensitized Solar Cell (장 파장 대 태양광을 흡수하는 염료감응형태양전지에 대한 염료와 합성)

  • Kim, Sangah;Yoon, Jooyoung;Kim, Jaehong
    • 한국신재생에너지학회:학술대회논문집
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    • pp.89.2-89.2
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    • 2010
  • The dye-sensitized solar cell (DSSC) is a device for the conversion of visible light into electricity, based on the sensitization of wide bandgap semiconductors. The performance of the cell mainly depends on a dye used as sensitizer. The absorption spectrum of the dye and the anchorage of the dye to the surface of $TiO_2$ are important parameters determining the efficiency of the cell. Generally, transition metal coordination compounds(ruthenium polypyridyl complexes) are used as the effective sensitizers, due to their intense charge-transfer absorption in the whole visible range and highly efficient metal-to ligand charge transfer. However, ruthenium polypyridyl complexes contain a heavy metal, which is undesirable from point of view of the environmental aspects. Moreover, the process to synthesize the complexes is complicated and costly. Alternatively, organic dyes can be used for the same purpose with an acceptable efficiency. The advantages of organic dyes include their availability and low cost. We designed and synthesized a series of organic sensitizers containing long wavelength absorption-chromophores for the dye sensitized solar cell. The DSSC composed of Blue-chromophores for the sensitization absorbed long wavelength region which is different also applied into the dye-cocktail (mixing) system. The photovoltaic property of DSSCs organic long wavelength absorption-chromophores were measured and evaluated by comparison with that of individual chromophores.

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Influence of Temperature and pH on Adsorption of Ru(II) Dye from Aqueous Solution onto $TiO_2$ Films ($TiO_2$ 전극과 Ru(II) 염료와의 흡착에 있어서 온도 및 pH의 영향)

  • Hwang, Kyungjun;Yoo, Seungjoon;Shim, Wanggeum;Lee, Jaewook
    • 한국신재생에너지학회:학술대회논문집
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    • pp.60.2-60.2
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    • 2010
  • A $TiO_2$ films in dye-sensitized solar cells was fabricated using $TiO_2$ colloidal sol prepared from titanium iso-propoxide used as a starting material by applying the sol-gel method. It was characterized by particle size analyzer, XRD, FE-SEM, and BET analysis. The adsorption isotherms of dye molecule on $TiO_2$ films were obtained at three different temperatures (30, 45, $60^{\circ}C$) and at three different pH (3, 5, 7). The adsorption kinetics of dye molecule on $TiO_2$ films were obtained at three different temperatures (30, 45, $60^{\circ}C$. The adsorption experimental data were correlated with Langmuir isotherm model and pseudo-second-order model. Also the isosteric enthalpies of dye adsorption were calculated by the Clausius-Clapeyron equation. In addition, the adsorption energy distribution functions which describe heterogeneous characteristics of nanocrystalline $TiO_2$ film surface were calculated by using the generalized nonlinear regularization method. We found that efficient adsorption of N719 dye from aqueous solution onto $TiO_2$ films can be successfully achieved by dye adsorption conditions and morphology of $TiO_2$ films.

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Dyeing of High Strength and High Molecular Weight Polyethylene Fiber Using Super Hydrophobic Fluorescence Dyes (초소수성 형광염료에 의한 고강도/고분자량폴리에틸렌섬유의 염색)

  • Kim, Taekyeong;Park, Jihoon;Lee, Junheon;Kim, Taegun
    • Textile Coloration and Finishing
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    • v.29 no.4
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    • pp.223-230
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    • 2017
  • Three super hydrophobic fluorescence dyes were selected to dye high molecular weight polyethylene fiber and their molar absorptivity, emission spectrum, and quantum yield were measured. From the results of color strength on the fiber, all the three dyes exhibited linear increase according to the dye concentration and Fluoro3 dye showed the highest color strength among them. Emission strength of the fluorescence dyes on the fiber was investigated according to the dye concentrations. The emission was increased with the increase of the dye concentration at relatively low dye concentration and then after showing the maximum emission strength the emission was decreased at higher dye concentrations. The highest emission was obtained in Fluoro2 dye. Color fastness to washing and rubbing was generally good enough, however, especially to light, only Fluoro3 dye exhibited rating 3 acceptable practically and Fluoro1 and 2 was ratings 1 which is unacceptable level.

Synthesis and Application of Color Depth Black Disperse Dyes for PET Fabric (PET 직물용 심색성 분산염료의 합성과 Black 염색)

  • Kim, Hye-Jin;Kim, Jae-Ho;Kim, Dong-Uk;Hong, Seung-Pyo;Kim, Sang-Jin;Kim, Hee-Dong;Kim, Hyun-Ah;Huh, Man-Woo
    • Textile Coloration and Finishing
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    • v.26 no.4
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    • pp.290-296
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    • 2014
  • In order to produce black disperse dye which has high heat resistance and depth color for polyester(PET), an orange disperse dye was designed and synthesized with pyridine based derivatives to get high heat resistance. Disperse blue dye adopts heterocycles structure for high molar extinction coefficient and long wavelength absorption. Synthesized disperse dye is micronized to an particle size of $0.7{\mu}m$. The mixing condition for black color using commercial disperse violet 93 is blue dye 30%, red dye 21%, and orange dye 21%, respectively. Dyed PET fabric with synthesized dye has quiet good color fastness to sublimation(grade 3-4) and has excellent rubbing, washing and light fastness grade 4-5.

A Study on the Characteristics of Dye Sensitized Solar Cells with Cell Area and Dye Absorption Time (셀 면적 및 흡착시간에 따른 염료감응형 태양전지 특성에 관한 연구)

  • Lee, Don-Kyu;Song, Young-Joo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.61 no.4
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    • pp.595-600
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    • 2012
  • In this paper, it is investigated the characteristics of DSSC(Dye Sensitized Solar Cell) with cell area(0.25, 1, 2.25 $cm^2$) and dye absorption time(12, 24, 36 h). Thus, we obtain the following results by using the EIS, UV-VIS, I-V measurement. When the cell area increases, the efficiency decreases to 21~32 percent because of the increase about 40~$60{\Omega}$ of internal impedance regardless of dye absorption time. When the absorption time increases up to 24 hours, the efficiency increases to over 40 percent cause of the reduction of internal impedance regardless of cell area. When the dye absorption time becomes 36 hours, the internal impedance increases and at the same time, in the range of 600~700 nm, as the optical absorption reduces. Therefore, the efficiency decreases to 19~31 percent. When it is absorbed the dye for 24 hours in the smallest cell area which is 0.25 $cm^2$, the DSSC has the best efficiency (7.11 %).

Analysis of the Dye Absorption Behavior in Accordance with the Dye Structure in the Cold Pad Batch Dyeing of Cotton Knit (면니트의 CPB 염색에서 염료 구조에 따른 흡진 거동 분석)

  • Hong, Seok Il;Nam, Chang Woo;Lee, Woosung
    • 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.