• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2012.03a
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• pp.45-45
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• 2012

초고분자량 폴리에틸렌(UHMWPE)섬유는 현재까지 알려져 있는 섬유중 비강도가 가장 우수하며 강도 또한 최고 40g/d를 나타내는 슈퍼섬유중에 하나이다. UHMWPE섬유는 비교적 간단한 분자구조로 이루어져 있으며 높은 결정화도로 인해 광 안정성 및 자외선 저항성이 우수하며 내마모성도 뛰어나다. 이러한 특성으로 인해 최근 로프 및 어망 등의 산업적 용도 뿐만 아니라 익스트림 스포츠웨어를 포함한 의류소재에도 다양하게 적용되고 있다. 하지만 의류소재 적용에 앞서 초소수성으로 이루어진 분자구조와 낮은 내열성으로 인해 염색이 쉽지 않으며 다양한 색상을 구현하기가 힘든 실정이다. 현재 본 연구실에서는 이와 같은 문제점을 해결하기 위해 UHMWPE섬유에 염색이 가능한 염료를 개발하였으며 보다 다양한 색상을 구현하기 위해 연구를 진행 중이다. 현재 본 연구실에서는 UHMWPE섬유 염색에 있어 Blue, Red, Yellow, Magenta 계열의 색상구현이 가능하며 보다 심색화 된 색상을 구현함으로 인해 의류용 섬유소재 및 산업용 섬유소재에 다양하게 적용할 수 있도록 UHMWPE섬유용 염료합성 실험이 진행되고 있다. 안트라퀴논 및 아조계 염료에 초소수성 알킬체인을 치환함으로써 염료의 소수성을 증가시켜 초소수성 섬유인 UHMWPE섬유에 염착성을 증가시키고 높은 견뢰도 결과를 확보하였다. 또한 내열성이 낮은 특성에도 불구하고 염색 이후 UHMWPE섬유가 가지는 물성에는 큰 변화를 나타내지 않았다.

• Journal of Korean Society on Water Environment
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• v.21 no.6
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• pp.564-568
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• 2005

The structural change of azo dye (Acid Red 27) by oxidation with ozone has been investigated using FT-IR and $^1H$ NMR. The solution pH was observed to decrease during oxidation reaction, which was considered to be due to the generation of several organic and inorganic acids as the result of the decomposition of azo compound. The FT-IR analysis showed that changes of specific absorption bands of Acid Red 27 were observed after ozonation. When azo dye was oxidized by ozone, several new peaks were shown to appear by $^1H$ NMR analysis and the peaks were generally shifted to the direction of up field. This was presumably due to the breakage of benzene ring contained in the molecular structure of Acid Red 27 by the oxidation and the shape of peaks was shown to change according to the reaction time.

• Journal of Korean Society of Water and Wastewater
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• v.23 no.4
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• pp.431-438
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• 2009

The purpose of this study was to evaluate the performances of zero-valent iron (ZVI) combined SBR (Z-SBR) process in decolorization and organic removal of synthetic dye wastewater. The batch test for optimizing the operation parameters of ZVI column showed that the appropriate EBCT was around 11 min and the pH of the dye wastewater was below 7.0. During the step increase of influent color unit from 300 to 1,000cu, about 53 to 79% decolorization efficiency could be achieved in control SBR (C-SBR, without ZVI column), which resulted from destroying azo bond of synthetic dye in anaerobic condition. For the same influent color loading, Z-SBR showed always higher decolorization efficiency than C-SBR with an aid of ZVI reducing power. The TCOD concentration in Z-SBR effluent was 20-30mg/L lower than C-SBR effluent although the TCOD before and after ZVI column was nearly same. It means that breakdown of azo bond by ZVI reducing power could increase biodegradability of synthetic dye wastewater.

• KSBB Journal
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• v.14 no.6
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• pp.718-723
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• 1999

In order to treat of alkaline dye-processing wastewater, alkalophilic strains biodegrading azo dye, Acid red 1, is isolated from natural system, and optimal culture conditions are examined using response surface analysis, statistical analysis system program. 15 different species which grow in alkaline culture media are isolated from the effluent and river soil discharged from wastewater treatment plant in dye industrial complex. One strain which has the best decolorization efficiency is chosen, and named as AR-1. The result of the examination of carbon, nitrogen and phosphorus sources which have influence on growth and decolorization reveals that optimum carbon, nitrogen and phosphorus sources are 1.0% fructose, 1.0% polypeptone, 1.0% yeast extract and 0.5% $K_2HPO_4$, respectively. In order to optimize of biodegradation conditions of dye by response surface analysis, the characteristics of decolorization and cell growth according to culture temperature and time are monitered. The result shows that the one is optimum 34.77$^{\circ}C$ for 12.97 hours; the other at 34.73$^{\circ}C$ for 12.96 hours. While, optimal conditions of culture that satisfy both cell growth and decolorization are the temperatures from 32.86$^{\circ}C$ to 36.36$^{\circ}C$ and the period of 10.96 to 15.75 hours, respectively.

• Journal of Korean Society of Environmental Engineers
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• v.27 no.7
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• pp.712-718
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• 2005

Stepwise reductions of glucose and Orange II concentration were observed from the experiment of both white-rot fungi such as T. versicolor and P. chrysosporium. As a result, typical removal patterns in those dual substrate system were categorized through several distinctive steps: initial lag period, primary and secondary carbon consumption periods. Also, based on the total removal amounts of Orange II, COD and Color during the experimental period, similar removal extent were observed from both species experiments, within the maximal error range of 5%. However, it was refereed that the internal steps of Orange II removal on enzymatic level should be different between two species: Enzyme Lac showed good affinity for Orange II removal in T. versicolor, however in P. chrysosporium enzyme LiP represented more close affinity to the similar experimental condition. Thus, even though the superficial removal amount of calcitrant Orange II at different fungal species was merely similar, removal pathway of enzymatic levels and intermediates produced during the fungal decomposition would be different.

• Clean Technology
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• v.10 no.3
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• pp.131-137
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• 2004

Due to the low biodegradability of dyes, conventional biological wastewater treatment systems are inefficient in treating textile wastewater. In this study, white rot fungus, Trametes versicolor KCTC 16781, were investigated for the decolorization of Reactive black 5 solutions. This fungus was able to degrade the dye solutions by the ligninolytic enzymes (laccase and MnP) produced. The enzyme activity remained constant until the end of reaction. The combined process of biological treatment and ceramic membrane showed better efficiency for decolorization and TOC removal than each single process.

• Journal of the Korean Society of Safety
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• v.13 no.2
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• pp.96-103
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• 1998

The treatment of the wastewater of Carmine-6B Process was studied using an electrochemical batch reactor with Pt-electrodes. The concentration of azo dye was exponentially decreased unto 6-37% residuum during 50 hr operations. The fractional conversion was not influenced by the initial pH value, but it was increased with increasing the rotating speed and/or temperature of the electrolyte. It was observed by the differential method of rate analysis that the rate of the oxidation reaction at anode was exponentially increased with increasing the cell voltage. The pH of the wastewater was changed from acid or alkali to neutral. The COD of the solution was increased at the beginning of the treatment, but it was decreased soon.

• Proceedings of the Korean Fiber Society Conference
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• 2003.10b
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• pp.104-107
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• 2003

Poly(vinyl alcohol) (PVA) obtained by the saponification of poly(vinyl ester) like poly(vinyl acetate) o. poly(vinyl pivalate) is a linear semicrystalline polymer, which has been widely used as fibers for clothes and industries, films, membranes, medicines for drug delivery system, and cancer cell-killing embolic materials[1-3]. PVA fibers and films have high tensile and compressive strengths, high tensile modulus, and good abrasion resistance due to its highest crystalline lattice modulus. (omitted)

• Korean Journal of Microbiology
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• v.36 no.3
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• pp.228-235
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• 2000

Until now, it was diIliculi to overproduce lignin peroxidase(LiP) fiom Pl~anemchaete ch~ysosporium since the lack of optimized growth conditions. In this paper, we optimized the LIP production conditions and monitored LIP isozyines of fl chqsospoi.ium PSBL-1. The optimized condition includes sponge matrix support, no addition of $MnSO_4$, excess addition of niixogen source(48 inM diarmnonium), and addition of stabilizer(2 mM verakyl alcohol). Finally we obtained Lip activity of 1,800 unitsll. HI isozyne was overproduced when inyceliuin was cultivated in media containing $Mn^{2+}$ (2.73 inM) and excess nitrogen(48 11d4 diannnonium). Three azo dyes(acid yellow 9, congo ued, orange IT; each concenimtion of50 $\mu$M) we1-e rapidly decolorized within 2 inins by 0.4 un~t or Lip.

• Textile Coloration and Finishing
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• v.19 no.3
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• pp.18-25
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• 2007

The fixing behaviors of anthraquinone disperse dyes containing dimethylamino substituent, such as C. I. Disperse Violet 26(D.V.26) and C. I. Disperse Blue 14(D.V.14), or containing diamino substituent, such as C. I. Disperse Blue 73(D.B.73), and monochlorotriazinyl azo reactive dyes, such as C. I. Reactive Orange 13(R.O.13), C. I. Reactive Red 3(R.R.3). C. I. Reactive Yellow 2(R.Y.2) on polyester/cotton blend(P/C) fabrics were examined for the one-step printing of P/C fabrics. The high temperature steaming of $175^{\circ}C$ is the most satisfactory fixing method for P/C one-step printing with above disperse and reactive dyes among the four different fixing methods: $175^{\circ}C$ steaming, $102^{\circ}C$ steaming${\rightarrow}175^{\circ}C$ steaming, $190^{\circ}C$ thermosol, $102^{\circ}C$ steaming${\rightarrow}190^{\circ}C$ thermosol. $190^{\circ}C$ thermosol is unfit to fix R.R.3 and R.Y.2 whose heat stability is poor. It was found that D.V.26 and D.B.14 containing dimethylamino substituent are unstable for heat and alkali, but D.B.73 is stable for them to print P/C blend fabrics with R.O.13 which is also stable for heat. Therefore we found that D.B.73, R.O.13 and a pair of D.B.73 and R.O.13 were very suitable for one-step printing of P/C blend fabrics.