• 한국염색가공학회지
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• 제14권3호
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• pp.26-33
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• 2002

Dyeing properties and crosslinking effect of bifunctional reactive dyes on chitosan fiber were investigated to improve the stability of chitosan fiber against the mild acidic solution and the wet processing. Chitosan fibers were crosslinked with epichlorohydrin for comparing purpose, and dyed with C. I. Reactive Red 194, C. I. Reactive Blue 50, and the reactive dye having two $\alpha$-bromoacrylamide groups at various concentrations. The initial dyeing rates of reactive dyes are rapid and chitosan fibers absorb the relatively large amount of dyes. The chitosan fibers dyed with these dyes show the low degree of swelling and the low solubility in 1 % acetic acid solution and also represent the higher thermal stability The reactive dye with two $\alpha$-bromoacrylamide groups shows higher crosslinking effect than other dyes.

• 한국의상디자인학회지
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• 제3권2호
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• pp.107-119
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• 2001

Compared on dye, pigment is not colored to textiles, fixed by binders, so it has been used for less expensive textiles. However, the function of a binder hs been improved s organic chemical industry develops, and the flexibility and softness of textiles hs gotten better. Some of dye printing is being replace by pigment printing. Pigment printing skills illuminated and make colors represented cleariy. Since their durabillty is reasonably good and washing processes are not needed, further development of these printing skills are predictable. This study suggests color samples though theoretical researches and experiments on pigment printing that causes less pollution and en be colored on any type of textiles. Especially, over printing can be used in industrial fields because it saves processing and expense. For the improvement of pigment printing skills, more improved studies on binders are expected.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 춘계학술대회 논문집
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• pp.669-670
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• 2006

Two-photon absorption coefficient of a series of dyes in polymer thin films was determined by measuring the femtosecond laser ablation threshold. The threshold value of polymeric thin films decreased gradually when the dopant increased. The two-photon absorption coefficient of the dye molecules dispersed in the polymer film was estimated by using the theoretical relationship between the ablation threshold of the blended polymeric thin films and the dye concentration. The relative values of two-photon absorption cross-section are in good agreement with those measured in solution. On the other hand, the absolute values are smaller than the latter.

• Bulletin of the Korean Chemical Society
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• 제32권10호
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• pp.3629-3633
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• 2011

The effect of a dense $TiO_2$ blocking layer prepared using the sol-gel method on the performance of dye-sensitized solar cells was studied. The blocking layer formed directly on the working electrode, separated it from the electrolyte, and prevented the back transfer of electrons from the electrode to the electrolyte. The dyesensitized solar cells were prepared with a working electrode of fluorine-doped tin oxide glass coated with a blocking layer of dense $TiO_2$, a dye-attached mesoporous $TiO_2$ film, and a nano-gel electrolyte, and a counter electrode of Pt-deposited FTO glass. The gel processing conditions and heat treatment temperature for blocking layer formation affected the morphology and performance of the cells, and their optimal values were determined. The introduction of the blocking layer increased the conversion efficiency of the cell by 7.37% for the cell without a blocking layer to 8.55% for the cell with a dense $TiO_2$ blocking layer, under standard illumination conditions. The short-circuit current density ($J_{sc}$) and open-circuit voltage ($V_{oc}$) also were increased by the addition of a dense $TiO_2$ blocking layer.

• Journal of Microbiology and Biotechnology
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• 제31권7호
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• pp.967-977
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• 2021

A total of 37 bacterial isolates were obtained from dye-contaminated soil samples at a textile processing factory in Nakhon Ratchasima Province, Thailand, and the potential of the isolates to decolorize and biotransform azo dye Reactive Red 141 (RR141) was investigated. The most potent bacterium was identified as Paenibacillus terrigena KKW2-005, which showed the ability to decolorize 96.45% of RR141 (50 mg/l) within 20 h under static conditions at pH 8.0 and a broad temperature range of 30-40℃. The biotransformation products were analyzed by using UV-Vis spectrophotometry and Fourier-transform infrared spectroscopy. Gas chromatography-mass spectroscopy analysis revealed four metabolites generated from the reductive biodegradation, namely sodium 3-diazenylnaphthalene-1,5-disulfonate (I), sodium naphthalene-2-sufonate (II), 4-chloro-1,3,5-triazin-2-amine (III) and N¹-(1,3,5-triazin-2-yl) benzene-1,4-diamine (IV). Decolorization intermediates reduced phytotoxicity as compared with the untreated dye. However, they had phytotoxicity when compared with control, probably due to naphthalene and triazine derivatives. Moreover, genotoxicity testing by high annealing temperature-random amplified polymorphic DNA technique exhibited different DNA polymorphism bands in seedlings exposed to the metabolites. They compared to the bands found in seedlings subjected to the untreated dye or distilled water. The data from this study provide evidence that the biodegradation of Reactive Red 141 by P. terrigena KKW2-005 was genotoxic to the DNA seedlings.

• KSBB Journal
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• 제14권6호
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• pp.718-723
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• 1999

알카리성 염색가공폐수를 처리하기 위햐여 아조염료인 Acid Red 1을 분해하는 호알카리성 균을 자연계에서 분리하였으며, 반응표면분석법인 SAS(statistical analysis system)프로그램을 이용하여 최적배양조건을 조사하였다. 염색공단 폐수처리장에서 배출되는 방류수 및 하천토양을 시료로 하여 알카리성(pH 10.0)배지에 성장하는 균 15종을 순수분리하였다. 그 중 탈색율이 가장 우수한 균주 하나를 선별하여 AR-1로 명명하였다. 탄소원(sucrose, fructose, galactose), 질소원(polypeptone, yeast extract) 및 인산원($K_2HPO_4$)이 분리균의 성장 및 탈색율에 미치는 영향을 조사한 결과, 1.0% fructose, 1.0% polypeptone, 1.0% yeast extract, 0.5% $K_2HPO_4$이 최적의 조건으로 나타났다. 반응표면분석에 의하여 염료의 생분해조건을 최적화하고자 배양온도와 배양시간에 따른 탈색율과 균성장의 특성을 모니터닝하였다. 탈색율은 34.73$^{\circ}C$에서 12.96시간, 균성장은 34.77$^{\circ}C$에서 12.97시간 배양시 각각 최적인 것으로 나타났다. 한편, 균성장과 탈색율을 다같이 만족할 수 있는 최적배양조건은 32.86~36.36$^{\circ}C$, 10.96~15.75시간으로 각각 나타났다.

• 한국응용과학기술학회지
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• 제38권1호
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• pp.9-18
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• 2021

본 연구는 인디고 염료로 모발에 도포하여 염색효과와 모질 특성 변화를 알아보고자 하였다. 연구방법은 인디고 염료를 중탕하여 사용하였다. 염료를 건강모와 탈색한 시료 모발에 도포 후 열처리와 자연방치 시간을 다르게 하였다. 측정은 시료별로 도포 전과 후를 측정하여 비교 분석하였다. 염색효과를 알기 위해 색차계를 이용하여 L⁎, a⁎, b⁎값과 물 빠짐을 측정하였다. 모질 변화를 알기 위해 인장강도, 메틸렌블루를 이용한 흡광도, 광택을 측정하였다. 결과는 염색효과 측정 결과 모든 시료에서 L⁎값, a⁎값, b⁎ 값의 도포 전과 후의 통계분석 결과는 유의미한 결과로 염색 효과가 있었다. 물 빠짐 측정결과는 1일차에는 가장 많이 빠졌고, 3일차부터는 더 이상의 물 빠짐이 없었다. 인장강도 측정결과는 모든 시료의 평균값은 증가하였다. 그러나 통계분석 결과 유의미하지 않은 결과로 모질의 특성 변화는 없었다. 메틸렌블루를 이용한 흡광도 분석결과 건강7L(3)을 제외 한 시료에서 통계분석 결과 모질의 특성 변화는 없었다. 광택측정결과는 통계분석 결과 광택에 변화를 주는 것을 알 수 있었다. 결론은 인디고 염료에 의한 모발 염색효과가 있었고, 모질의 특성 변화는 광택은 있고, 인장강도와 흡광도 변화는 없었다. 차후 다양한 염색 처리방법 연구와 신뢰성과 객관적 결과를 위한 측정 연구가 필요하다.

• 원예과학기술지
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• 제32권3호
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• pp.390-399
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• 2014

본 연구는 절엽의 보존엽 가공기술을 개발하기 위해서 화훼장식용으로 많이 사용하는 유칼립투스(Eucalyptus cinerea F. Mull. ex Benth.)의 보존엽 제작을 위한 보존염료 처리시 온도, 증기압차(VPD), 광주기 등 환경조건과 침지처리기간이 엽색에 미치는 영향을 구명하고자 수행되었다. 균일한 성숙도의 잎을 가진 유칼립투스 절엽(줄기 포함)을 20cm로 절취한 후 온도(10, 20, 30, $40^{\circ}C$), VPD(0.23, 0.70, 1.16, and 1.61kPa), 광주기(0, 6, 12, 24 h)가 다른 생장상에서 보존염료에 3, 6, 9, 12일간 줄기 하단부를 침지하여 흡수시켰고, 이후 $20^{\circ}C$의 실험실에서 3일간 건조시켰다. 그 결과, 보존염료 처리 시 온도가 낮을수록 신선엽과 비교하여 엽색의 차이가 줄어들어 ${\Delta}E$값이 감소하였다. 특히 고온구에서 갈변현상에 의해 적색도(a)의 증가와 황색도(b)의 감소가 나타났다. VPD는 낮을수록 대조구와의 엽색 차이가 적어 ${\Delta}E$값이 감소하였다. 광주기는 짧을수록 엽색의 변화가 적어 ${\Delta}E$값이 감소하였다. 또한 환경조건에 관계없이 흡수기간이 길어질수록 엽색의 변화가 커져 ${\Delta}E$값이 증가하였다. 보존염료 흡수 후 건조 3일째 줄기와 잎의 유연성은 온도, VPD 및 침지기간이 감소할수록 증가하였다. 따라서, 보존염료 흡수 시 $10-20^{\circ}C$의 암 상태에서 0.23-0.70kPa VPD가 최적 환경조건이라 판단되며, 보존염료 처리기간은 보존엽의 품질 및 경제성 면에서 3일이 적당하다고 판단되었다. 이들 환경조건의 공통점은 증산에 의한 수분 손실 속도를 줄인다는 것으로, 이 범위를 많이 벗어나면 급격한 수분 손실에 의해 황변이나 갈변으로 품질이 떨어지게 된다.

• 한국염색가공학회지
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• 제30권2호
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• pp.141-149
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• 2018

This study aimed to investigate the efficacy of eco-friendly leather dyeing by utilizing food wastes. Natural dyeing of eel skin was attempted using onion peels which have been used commonly for natural dyeing of textile fabrics. Eel skin is a by-product from fishery processing and is used mainly for making leather products. The colorant was extracted from onion peels in boiling water, concentrated, and freeze-dried. Dyeing of eel skin was carried out to study the effects of dyeing conditions, mordant type and mordanting method on dye uptake, color change, drape stiffness and colorfastness. The optimum dyeing conditions were $60^{\circ}C$ of dyeing temperature, 60min of dyeing time at 1:100($H_2O$ 90%: ethanol 10%) of bath ratio. The onion peels produced yellowish color on eel skin. The pre-mordanting was effective than the post-mordanting. As a result of the drape stiffness measurement, the Fe-mordanted sample was somewhat stiffer comparing to other mordanted samples. The light fastness of the non-mordant dye was excellent in 3-4 grade. Drycleaning fastness and rubbing fastness showed excellent results, but fastness was not significantly improved by mordanting.

• 한국의류학회지
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• 제18권3호
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• pp.287-297
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• 1994

The purpose of this study is to investigate the Improvement of fiber surface, tenacity & elogation, fabric counts, thickness, handle, moisture regain, static voltage, handle, dyeability when polyester fabrics are treated with NaOH solution adding quartemary ammonium salt (Benzyl dimetyl dodecyl ammonium chloride . BDMDAC) The results are as follows. I. In regard to the method of processing VET, when the PET fabrics are alkaline-hydrolyzed adding BDMDAC, the weight loss of PET fabrics increased remarkably to the increse of BDMDAC concentration than when they are treated only in NaOH solution. When PET fabrics are alkaline-hydrolyzed the amount of BDMDAC as the catalyst is proper lg/1 II. The change in physical & chemical properties of alkaline-hydrolyzed PET fabrirs. 1. As the amount of the weight loss on PET fabrics increased, the void space of the PET yale increased but tenacity & elongation and thickness decreased. 2. The fabric counts of PET increased due to shrinkage by alkaline-hydrolydzing. 3. As the amount of of the weight loss on PET fabrics increased. NUMERI, FUKURAMI, increaseed and KOSHI decreased and Total hand value(T.H.V) in all cases increaseed. When the weight Ioss is 30.9% T.H.V. is best. 4. Moisture regain of PET fabrics a little increased by alkaline-hydrolyzing treatment. As the weight loss increased, static voltage is decreased. 5. The last dye absorption is different according to the degree of the Affinity. In regard to the difference of dye color, the dyestuff of low molecular weight dyed for deep color.