• Title, Summary, Keyword: Dye

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Absorption Spectroscopical Studies on the dye-surfactant interactions (색소-계면활성제 상호작용에 관한 흡수분장학적 연구)

  • Park, No-Youn;Lee, Hong;Pae, Huyn-Ock
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.17 no.1
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    • pp.18-28
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    • 1991
  • Spectral behaviors of cationic dye, crystal violet(CV), in aqueous solution and with varying concentrations of Triton X-100(TX-100), sodium dodecylsulfate (SDS) and cetyl trimethyl amonium bromide(CTAB) were studied. The characteristic changes of the absorption spectra observed in the dye-SDS interacting systems with the SDS concentration are analyzed. The behaviors of both a- and J-bands of the each componet dye suggest that the following four sequential steps are occurring : the formation of dye-SDS complex, the stacking of the dye molecules arising from the association of the dye-SDS complex, breaking of the dye stacking due to the formation of micelles, redistribution of the dye molecules in the surface of micelles at high SDS concentration.

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The Effect of Acetophenone on the Dyeing of Silk (견섬유의 염색에 있어서 아세토페논의 영향)

  • 김태경;임용진;박태수
    • Textile Coloration and Finishing
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    • v.10 no.5
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    • pp.56-62
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    • 1998
  • In the prior study, the dyeing behaviors of Milling Cyanine 5R on silk fiber in aqueous dyeing liquor including small amount of organic compounds were investigated. The most effective compound was acetophenone which increased dye uptake as well as dyeing rate. In this study, the role of the acetophenone in dyeing of silk with Milling Cyanine 5R was studied. By addition of acetophenone into the dye solution, the molar absorptivity of Milling Cyanine 5R increased, and the wavelength of maximum absorption was shifted to longer wavelength, namely bathochromic shifted. This shows that the acetophenone prevents the dye to aggregate, and increases the number of monomeric dye molecule relative to the dye solution without acetophenone. This fact was also confirmed by the increase of the permeation rate of the dye through cellulose semipermeable membrane from the dye solution including the acetophenone. From these results, the acetophenone acts as a prohibitor of dye aggregation, increases the number of monomeric dye molecules even at relatively low temperature, and makes the dyes penetrate into the fiber easier.

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Treatment of organic dye solutions by electrodialysis

  • Majewska-Nowak, Katarzyna M.
    • Membrane Water Treatment
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    • v.4 no.3
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    • pp.203-214
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    • 2013
  • Laboratory tests were performed to determine the efficiency of dye solution desalination by electrodialysis. The study involved anionic dye and mineral salt recovery by obtaining two streams from a salt and dye mixture - dye-rich solution and salt solution. A standard anion-exchange and cation-exchange membranes or monovalent selective anion-exchange membranes were used in the ED stack. It was found that the separation efficiency was strongly dependent on the dye molecular weight. The best results for standard ion-exchange membranes were achieved for the desalination of Direct Black solution. Furthermore, the obtained results implied that the application of monovalent selective anion-exchange membranes improved the recovery of dye and salt solutions - the dye concentration in the diluate remained constant irrespective of the molecular weight of anionic dyes, whereas the salt recovery remained very high (99.5%).

Dyeing Behaviors of a Disperse Dye on Ultra-micro PET Fibers (PET 초극세 섬유에서 분산염료의 염색 거동)

  • Cho, Hyeon-Tae;Lee, Hun
    • Textile Science and Engineering
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    • v.47 no.2
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    • pp.77-84
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    • 2010
  • Wide range of fineness of ultra-fine denier PET filaments (0.2~0.01 denier per filament) were prepared and the effects of fineness on the dyeing properties of a disperse dye (CI Disperse Blue 56) were studied. The equilibrium study of the disperse dye on the fibers at various concentrations showed that the isothermal absorption was Nernst type and that the equilibrium adsorption of the dye increased with the increase in fiber fineness. Dyeing rate of the dye increased with the decrease in fiber fineness. The apparent diffusion coefficient of the dye in the ultra-fine denier fibers decreased when the fiber fineness increased because of the limited dye liquor turbulence through the compactly assembled filaments in the ultra-fine denier yarn. The temperature dependence of dye diffusion decreased with the fiber fineness.

A Study on the Preparation of Poly(vinyl alcohol) Polarizing Film (폴리비닐알코올 편광필름 제조에 관한 연구)

  • 김삼수;우화령;류원석
    • Textile Coloration and Finishing
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    • v.16 no.4
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    • pp.19-25
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    • 2004
  • Both poly(vinyl alcohol)$(PVA)-I_2$ and PVA-dye polarizing film were prepared using PVA with number-average degree of polymerization of 1,700, 2,300, 2,600. The optical property of used dye in this study closed to the that of iodine. The PVA-dye polarizing film was prepared through the dyeing process. In comparison of the result of the measurement of the heat and humidity resistance of two types polarizing films, it of PVA-dye polarizing film was higher than that of a conventional $PVA-I_2$polarizing film. The transmittance and the polarization efficiency of PVA-dye polarizing film was significantly influenced by dye concentration, dipping time, salt concentration, and temperature of dye bath. The PVA-dye polarizing film exhibited a high polarization efficiency of 99.3% and a good transmittance of 42.4%.

A Study on Optimal Dye-coating Conditions to Reduce Dye-adsorption Time with Improved DSSC Efficiency

  • Seo, Yeong-Ho;Choe, Eun-Chang;Hong, Byeong-Yu
    • Proceedings of the Korean Vacuum Society Conference
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    • pp.481.1-481.1
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    • 2014
  • Dye-sensitized solar cell (DSSC) has been extensively investigated as the next generation energy source. Despite attractive features of simple fabrication process and its economical efficiency, there are some problems such as low efficiency and low long-term stability. Many groups have attempted the proposed way to improve the cell efficiency and long-term stability such as low recombination rate between $TiO_2$ surface and electrolyte, the development of new dye molecules capable of light adsorption as broadly as possible, the fabrication of a solid-state DSSC by replacing the liquid electrolyte, and protective coating on glass. In this work, we confirmed new dye-coating conditions to maximize the dye adsorption between the dye and $TiO_2$ nanoparticle surface. The experiment results coating conditions with the coating temperature of $70^{\circ}C$, the dye concentration of 10 mM and the coating time of 3 min. Conditions have two times, three times cycle the experiment in progress efficiency rises.

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A Study on the Improvement of Coloring in Dye-sensitized Solar Cell (염료감응형 태양전지의 착색 특성 개선 연구)

  • Seo, Hyun-Woong;Kim, Mi-Jeong;Son, Min-Kyu;Lee, Kyoung-Jun;Hong, Ji-Tae;Kim, Hee-Je
    • 한국신재생에너지학회:학술대회논문집
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    • pp.297-300
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    • 2007
  • In this study, we have attempted a new method to enhance the coloring of dye on the $TiO_2$ surface in the dye sensitized solar cell. In the conventional coloring process in a dye sensitized solar cells, dye is absorbed by the covalent bond between TiO2 and dye molecule while the photo-electrode coated with $TiO_2$ layer is soaked in dye solution for about 12-24 hours. But this process takes long time, so we have researched more effective and faster way than the conventional process by applying electric field. Three kinds of electric power such as direct voltage, alternating voltage and pulse voltage were applied to the transparent conducting oxide during the coloring process. As a result, we achieved improved power, fill factor and efficiency of dye-sensitized solar cell in case of applying direct voltage and pulse voltage. In contrast, alternating voltage tend to reduce the dye adsorption on the $TiO_2$ surface and hence the efficiency. We measured the absorption spectra of dye by UV-VIS spectrophotometer before and after soaking the $TiO_2$ in the dye and found no characteristic change in the dye was observed. In this study, we researched on shortening time of coloring process which spent much time in the whole process.

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Combination Dyeing of Triacetate/PET Blended Fabric with Disperse Dye (트리아세테이트/PET 혼방 직물의 분산염료 혼합염색)

  • Kim, Myoung Ok;Lee, Jung-Soon
    • Science of Emotion and Sensibility
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    • v.19 no.4
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    • pp.3-12
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    • 2016
  • The aim of this study is to find the optimal combination dyeing condition for the enhancement of dye uptake and union dyeing of the composite material fabric made of triacetate and quick drying PET blended yarn. For the experiment, fabrics were one-bath combination dyed using the mixed dye of E-type disperse dye(C.I Disperse red 50) and S-type disperse dye(C.I. Disperse red 92) to measure dyed fabric's dye exhaustion, dye uptake, color and color difference according to the diverse conditions including dying temperature, time and mixed ratio of the dye. Dye equilibrium of combination dyeing occurred in $100^{\circ}C$, but by comparing dyed fabrics' K/S value and surface color, it was found that $120^{\circ}C$ was where the manifestation of color of triacetate and quick drying PET was identical. Mixed dye exhaustion and dye uptake merely changed as dyeing time increased, but color became more uniform. Therefore, it can be concluded that by using combination dyeing method, and by using the mixed dye which the mixing ratio of S-type dye and E-type dye is appropriately controlled, dye uptake can be improved compared to using single dyeing regardless of the color of E-type dye.

Factors Affecting the Absorption and Diffusion of Disperse Dye in Print Paste for Polyester Film (폴리에스테르 필름에 대한 날염호 중의 분산염료의 염착 및 확산에 영향을 미치는 인자)

  • Park, Geon-Yong
    • Textile Coloration and Finishing
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    • v.19 no.6
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    • pp.21-27
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    • 2007
  • The factors which affect the absorption and diffusion of disperse dye in print paste for polyester film were investigated using film roll method. When Emvatex print paste of different disperse dye concentrations were fixed by high temperature steaming(HTS) for 2 hr at $190^{\circ}C$, the dye uptake and diffusion distance of 50g/kg dye concentration for PET film were very low, but those of 100$\sim$300g/kg were increased with increasing dye concentration. It was found that sodium alginate(5%) was more effective for the absorption and diffusion of disperse dye to PET film than CMC(3%) and Emvatex(18%), and Emvatex showed comparatively low absorption in three thickeners used. The dye uptake and diffusion distance of disperse dye in sodium alginate paste for PET film were increased with increasing paste thickness to $160\sim180{\mu}m$, but were decreased at $200\sim220{\mu}m$ in both fixations of baking and HTS for 2 hr at $190^{\circ}C$, and were far more largely increased by fixation of HTS than baking because steam was very important for fixation. Also it was confirmed that dye uptake was slightly increased as steam supply pressure was raised from 1 $kg/cm^2$ to 2 $kg/cm^2$, andthe dye uptake and diffusion distance of disperse dye were outstandingly increased with raising fixing temperature from $170^{\circ}C$ to $190^{\circ}C$ and fixing time from 0.5 hr to 3 hr in the fixation of HTS.

SPECTRAL SENSITIZATION AND PHOTOGRAPHIC CHARACTERISTICS OF NAPHTHOTHIAZOLO CARBOCYANINE DYE

  • Kim, Yeoung-Chan
    • Journal of Photoscience
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    • v.3 no.2
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    • pp.65-69
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    • 1996
  • In this paper, it was studied about the red-sensitive layer. UV-Vis data of the dye at monomeric and J-state were considered with respect to their performance(contrast, density and fog) in photographic emulsion. The sensitizing effect of the dye is found to be strongly structuredependent. Naphthothiazolo carbocyanine dye can be used as red-sensitizing dye for the spectral sensitization of photographic emulsion.

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