• Title, Summary, Keyword: Dye

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A Study on the After Chroming of Dyed Silk Treated with Ferric Nitrate (질산철 처리에 의한 염색견사의 후매염에 관한 연구)

  • Kim, Gyeong-Hwan;Kim, Han-Do;Seong, U-Gyeong
    • Textile Science and Engineering
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    • v.20 no.4
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    • pp.20-27
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    • 1983
  • In general, the silk dyed with acid dyes is not good in fastness. To improve this defect, the silk dyed with Acid Mordant Blue 1 is treated with ferric nitrate solution. The results are as follows: 1) The amounts of iron absorbed on the dyed silk increase with the increase of temperature, concentration and pH of the ferric nitrate solution. 2) The development of the colour by the after chroming is accelerated according to the increase of treating temperature. In general, when the molar ratio between the absorbed dye and iron on the dyed silk is 1, the development of the colours reaches highest. 3) The colour fastness to light, washing, and hot water are improved by the after chroming, which is caused by the stable chelate formed with reaction of dye and ferric ion. 4) The amount of dye-Fe(III) complex is increased with the increase of Fe(III) concentration in the aqueous dye-Fe(NO$_3$)$_3$ solution which is the constant concentration of dye. With the reaction of Fe(III) on dye to the mole ratio 〔Fe(III)〕/〔dye〕=1, the absorbance of the maximum wavelength band 430nm of dye are decreased with the increase of the maximum wavelength band 590nm of dye-Fe(III) complex. As a results, it may be regarded that Fe(III) forms 1:1 complex type with the dye.

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Dyeing Property and Functionality of Silk Fabrics Dyed with Rhododedron brachycarpum Extracts (만병초 추출물에 의한 견직물의 염색성 및 기능성)

  • Kim, Sangyool
    • Journal of Fashion Business
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    • v.23 no.3
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    • pp.23-34
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    • 2019
  • The aim of this study is to explore the possibility utilizing Rhododedron brachycarpum as a new natural dye resource. It was dyed in silk fabric according to different dyeing conditions such as dye concentration, dye bath temperature, dyeing time and dye bath pH. The effect of the mordanting conditions were estimated as dyeability and color changes. Additionally, the colorfastness, antibacterial property, ultraviolet protection properties of the dyed and mordanted silk fabrics were examined. The water-soluble dye of Rhododedron brachycarpum extracted with distilled water was expressed as Yellow Red color. The dye-abilities of silk generally increased depending on the increasing values of dye concentration, dye bath temperature and dyeing duration. The highest K/S values were obtained at a dye concentration of 100% (v/v), a dye bath temperature of $90^{\circ}C$, a dyeing duration 120 minutes and a dyeing of pH 2. The light fastness of dyed and Cu mordanted silk fabrics were found to be 4 grade while Al, Fe mordanted silk fabrics were found to be 2~3 grade. The dry cleaning and rubbing fastness were excellent or good. The fade of washing fastness was not good, however, the stain of washing fastness was excellent. The dyed and Al, Cu mordanted silk fabrics indicated 99.9% reduction rate. The dyed and the mordanted fabrics showed very good ultraviolet protection factors.

A Study on the Behaviors of Nonionic Surfactants in Dyeing of Acid Dye (산성염료염색에 있어서의 비이온계면활성제의 거동에 관한 연구)

  • Kim, In-Gyu
    • Textile Science and Engineering
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    • v.22 no.5
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    • pp.59-69
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    • 1985
  • The interaction between a milling type acid dye-C.I. Acid Blue 113 and non-ionic surfactants were measured by the spectrometric continous variation method and change of cloud point, with variations in carbon number of alkyl chain and in length of ethylene oxide chain of that surfactants. Effects of these surfactants on the dyeing rate of the dye on wool were also investigated and discussed in view of complex formation with the dye. The results of this study are summarized as follows: 1) By a series of the surfactants having the same hydrophbic part, the mole ratio of surfactant to dye and association constant of complex decrease with increase in length of ethylene oxide chain. 2) The mole ratio of surfactant to dye and association constant however, show more higher values as the carbon numbers of hydrophobic part increases when a series of the surfactants having the same length of ethylene oxide chain in concerned. 3) The cloud point of the surfactants is raised by the presence of the dye. 4) The rate of the dyeing on wool is slow downed as the association constant increases, but does not greatly affected by the mole ratio of surfactant to dye. 5) The levelling action of non-ionic surfactants greatly depends on their interactions with dye in dye solution.

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A Study on The Natural Dyeing of Crataegi fructus Extracts (산사 추출물을 이용한 천연염색 연구)

  • Kim, Sangyool
    • Journal of Fashion Business
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    • v.23 no.4
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    • pp.100-111
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    • 2019
  • In this study, the dyeing properties and functionalities of Crataegi fructus extract were investigated for the purpose of application to new natural dye resources. The effects of dyeing conditions(concentration of dye, dye bath temperature, dyeing duration and dye bath pH) and mordanting on dye uptake and color changes were also examined. The study also estimated the colorfastness, antibacterial properties, and ultraviolet protection properties of the dyed and mordanted silk fabrics. The dye uptake increased in tandem with the dye concentration and dye bath temperature. The highest K/S values were obtained at the following conditions: a dye concentration of 100%(v/v), a dyeing period of 60 minutes, a dye bath temperature of $90^{\circ}C$, and a dyeing pH of 3. The colorfastness of the material when dry cleaned or rubbed ranged from good to excellent and fastness to light was rated at grade 2-3. The change in the color grade when exposed to washing was not good; however, the stain of washing fastness was good at a range of 4-5. In regards to the functional property aspects, the dyed and mordanted fabrics exhibited excellent results with a 99.9% reduction rate, and excellent ultraviolet protection factors.

Properties of PMMA Dyed with Reactive Azo Dye (반응성 아조염료로 착색한 PMMA의 성질)

  • Geum, Neri;Heo, Ji-Won
    • Applied Chemistry for Engineering
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    • v.17 no.4
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    • pp.426-431
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    • 2006
  • Acryl and vinyl sulfone functionalized blue and orange azo dyes were prepared by the coupling reaction of 6-bromo-2-cyano-4-nitroaniline and 2,5-dimethoxy-4-(vinylsulfonyl)benzenamine with 3-acrylamido-(N,N-diethylamino)benzene and 3-methyl-(N,N-diethylamino)benzene, respectively, for the coloring of poly(methyl methacrylate) (PMMA). Allyl functionalized dye was also prepared by reacting vinyl sulfone-containing dye with allylamine. Three types of dyeing method were used: the copolymerization of reactive dye with methyl methacrylate (MMA) and dyeing by polymerization of MMA in the presence of polymeric dye and dye 2 without reactive function. The color fastness for the three PMMAs were evaluated by comparing the solubility of dye under various conditions.

Diffusion Behaviors of Disperse Dye to PET Film from Print Paste Using Film-Roll Method (필름권층법에 의한 날염호 중의 분산염료의 PET 필름에 대한 확산거동)

  • Park, Geon Yong
    • Textile Science and Engineering
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    • v.54 no.2
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    • pp.125-130
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    • 2017
  • When sodium alginate paste and filter paper containing disperse dye were fixed by high temperature steaming (HTS), the diffusion behaviors of disperse dye to PET film from print paste or filter paper were investigated by film-roll method and the diffusion equation of semi-infinite medium. By HTS at $170-190^{\circ}C$ for different fixing times, dye uptakes and the diffused distances were increased and the differences of dye uptakes between each layers of PET film-roll were decreased with elevating temperature and fixing time, which resulted in the large increases of diffusion coefficients. In the case of print paste, compared with filter paper, relatively large amounts of diffused dye occurred to increase both the dye uptakes of layers and the differences of dye uptakes between each layers, which caused the decreases of diffusion coefficients. The apparent activation energy obtained from the diffusion coefficients of dye to PET film from print paste was 30.9 kcal/mol, and that from filter paper was 26.0 kcal/mol.

Analysis of Dye Extracted from Phellodendron Bark Using Liquid Chromatography

  • Ahn, Cheun-Soon
    • Journal of the Korean Society of Clothing and Textiles
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    • v.35 no.12
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    • pp.1507-1517
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    • 2011
  • Berberine, palmatine, and Phellodendron bark dye was prepared in methanol for HPLC-DAD-MS analysis of liquid dye. Silk was dyed using berberine, palmatine, and Phellodendron bark dye prepared in water. The dye was extracted from the dyed silk using the HCl/methanol/water (2:1:1 v/v/v) solvent system with a slight modification. The liquid dyes and the dye extracted from the silk samples dyed with the three dye sources were examined using the HPLC-DAD-MS analysis to simultaneously detect berberine and palmatine from the plant dye and the dyeings. Colorimetric measurement was carried out using a spectrophotometer to examine the color and the intensities of berberine, palmatine, and Phellodendron bark dyed silk samples. From the liquid dyes, berberine eluted at 5.21 min with the molecular cation m/z=336 and the UV spectrum confirming that the product was berberine. Palmatine eluted at 5.12 min with the molecular cation m/z=352 and the UV spectrum confirming that the product was palmatine. From the silk dyed with berberine and palmatine dye, berberine and palmatine species eluted at 5.35 min and 5.24 min, respectively. From the silk dyed with Phellodendron bark, berberine and palmatine were detected simultaneously at 5.35 min and 5.26 min, respectively. All three dyes had yellow hue while palmatine dyed silk showed the highest hue and chroma. Palmatine dyed silk showed the highest K/S value that indicated the strongest color intensity and the highest dye uptake.

Analysis of Dye Aggregation Using NNMF Algorithm(I) - Acid Dyes in an Aqueous Solution - (NNMF 알고리즘을 이용한 염료 회합의 분석(I) - 수용액에서 산성염료의 회합 -)

  • Kim, Hye-Hyeong;Park, Chul-Kwon;Cho, Hyeon-Tae
    • Textile Science and Engineering
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    • v.49 no.2
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    • pp.75-81
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    • 2012
  • It has been known that the absorption spectra of aqueous organic dye solutions tends to deviate from the Lambert-Beer law depending on solution conditions, which is considered to be mainly due to the dye aggregation caused by the intermolecular interaction among dyes. In this study, the visible spectra regarding two types of acid dyes in an aqueous solution, as well as the levelling type and milling type of acid dyes, were measured under different solution conditions such as changes of dye concentration and temperature. The non-negative matrix factorization (NNMF) method was adopted for the spectrum analysis. With the NNMF algorithm, several types of spectra caused by the dye aggregation could be measured and quantitative analysis for the dye aggregation was possible. When the concentration regarding the dye or dye solution temperature was changed, the two types of dye showed quite different aggregation behaviors which can be discussed with the hydrophobic property of the dyes.

Textile dye wastewater treatment using coriolus versicolor

  • Sathian, S.;Radha, G.;Priya, V. Shanmuga;Rajasimman, M.;Karthikeyan, C.
    • Advances in environmental research
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    • v.1 no.2
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    • pp.153-166
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    • 2012
  • Decolourization potential of white rot fungal organism, coriolus versicolor, was investigated in a batch reactor, for textile dye industry wastewater. The influence of process parameters like pH, temperature, agitation speed and dye wastewater concentration on the decolourization of textile dye wastewater was examined by using Response surface methodology (RSM). The maximum decolourization was attained at: pH- 6.8, temperature - $27.9^{\circ}C$, agitation speed - 160 rpm and dye wastewater concentration - 1:2. From the analysis of variance (ANOVA) results it was found that, the linear effect of agitation speed and dye wastewater concentration were significant for the decolourization of textile dye wastewater. At these optimized condition, the maximum decolourization and chemical oxygen demand (COD) reduction was found to be 64.4% and 79.8% respectively. Various external carbon sources were tried to enhance the decolourization of textile dye wastewater. It was observed that the addition of carbon source enhances the decolourization of textile dye wastewater. Kinetics of textile dye degradation process was studied by first order and diffusional model. From the results it was found that the degradation follows first order model with $R^2$ value of 0.9430.

Tri-branched tri-anchoring organic dye for Visible light-responsive dye-sensitized photoelectrochemical water-splitting cells (염료감응형 광전기화학 물분해 전지용 Tri-branched tri-anchoring organic dye 개발)

  • Park, Jeong-Hyun;Kim, Jae-Hong;Ahn, Kwang-Soon
    • 한국신재생에너지학회:학술대회논문집
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    • pp.87-87
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    • 2010
  • Photoelectrochemical (PEC) systems are promising methods of producing H2 gas using solar energy in an aqueous solution. The photoelectrochemical properties of numerous metal oxides have been studied. Among them, the PEC systems based on TiO2 have been extensively studied. However, the drawback of a PEC system with TiO2 is that only ultraviolet (UV) light can be absorbed because of its large band gap (3.2 - 3.4 eV). Two approaches have been introduced in order to use PEC cells in the visible light region. The first method includes doping impurities, such as nitrogen, into TiO2, and this technique has been extensively studied in an attempt to narrow the band gap. In comparison, research on the second method, which includes visible light water splitting in molecular photosystems, has been slow. Mallouk et al. recently developed electrochemical water-splitting cells using the Ru(II) complex as the visible light photosensitizer. the dye-sensitized PEC cell consisted of a dye-sensitized TiO2 layer, a Pt counter electrode, and an aqueous solution between them. Under a visible light (< 3 eV) illumination, only the dye molecule absorbed the light and became excited because TiO2 had the wide band gap. The light absorption of the dye was followed by the transfer of an electron from the excited state (S*) of the dye to the conduction band (CB) of TiO2 and its subsequent transfer to the transparent conducting oxide (TCO). The electrons moved through the wire to the Pt, where the water reduction (or H2 evolution) occurred. The oxidized dye molecules caused the water oxidation because their HOMO level was below the H2O/O2 level. Organic dyes have been developed as metal-free alternatives to the Ru(II) complexes because of their tunable optical and electronic properties and low-cost manufacturing. Recently, organic dye molecules containing multi-branched, multi-anchoring groups have received a great deal of interest. In this work, tri-branched tri-anchoring organic dyes (Dye 2) were designed and applied to visible light water-splitting cells based on dye-sensitized TiO2 electrodes. Dye 2 had a molecular structure containing one donor (D) and three acceptor (A) groups, and each ended with an anchoring functionality. In comparison, mono-anchoring dyes (Dye 1) were also synthesized. The PEC response of the Dye 2-sensitized TiO2 film was much better than the Dye 1-sensitized or unsensitized TiO2 films.

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