• 한국염색가공학회지
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• 제10권5호
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• pp.48-55
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• 1998

Polyester fabric is widely used in textile material though it has some problems such as low colour value, high refractive ratio(1.62) and etc. In order to give Z-black colour of polyester fabric, this study has selected several disperse dyes by measuring of absorbance, dyed in their optimum conditions and treated with 4 kinds of low refractive compounds such as silicone, fluorine, urethane and silicone-fluorine mixed compounds. The bathochromic effect of treated PET fabric evaluated as lightness(L) change by uv-visible spectrophotometer. This study also investigated that the effect of used bathochromic agents on the washing and lightfastness of treated PET fabric.

• 한국염색가공학회지
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• 제4권1호
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• pp.1-9
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• 1992

In order to study on the surface modification of the poly(ethylene Terephthalate)(PET) fabrics, low temperature plasma$(O_2)$ has been irradiated on the PET fabrics in various conditions. Experiments were carried out at pressure ranging from 0.5 tort to 3 tort. The properties of PET fabrics treated with low temperature plasma($(O_2)$, such as bathochromic, wettability, antistatic property were measured. Etching ratio was increased as the pressure and the output of discharge increased. When its were put on the cathode, the most efficient effect of etching according to the position of sample between anode and cathode was obtained. The bathochromic effect has more or less improved as pressure was getting higth in case of dyed fabrics treated with only low temperature plasma$(O_2)$ . And when it was treated with the low refractive index resin, the bathochromic of dyed fabrics treated with low temperature plasma$(O_2)$ was better than that of the dyed fabrics untreated.

• 한국염색가공학회지
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• 제5권3호
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• pp.194-205
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• 1993

Plasma polymerization in prepared glow discharge was carried out to improve the bathochromic of dyed PET fabrics by using silicon containing vinyl monomer in plasma polymerization equipment which consists of a pair of electrodes was connected to the 13.56MHz RF generator. The optimum condition for the bathochromic effect was investigated on various plasma polymeriztion parameters. By plasma polymerization used silicon containing vinyl monomer, the bathochromic of dyed PET fabrics was very enhanced. The optimum conditions on this equipment were as follows ; electrode distance : 3cm, discharge output : 60W, gas pressure : 0.3 Torr, monomer flow rate : 30㎤/min. plasma polymerization time : 60sec. The apparent strength of plasma polymerized PET fabrics was increased about 40∼47% with decreasing about 3 of L value.

• The International Journal of Costume Culture
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• 제13권1호
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• pp.62-66
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• 2010

Of all the ways that energy is consumed within textile industry, few are as high energy-expending as dyeing process. The energy consumption in dyeing process amounts to 77% of total fuel consumption, 54% of total electricity use. A technical development in terms of efficient saving energy and time as well is required in the process of dyeing textiles. Recently, dyeing experts are investigating new technologies can conserve energy grafting into microwaves, radio waves, infrared lights, etc. Dyeing industry in Korea, however, the research related to energy conservation has been rarely conducted. Accordingly, this study aims to examine the possibility where especially microwaves could be applied to reduce the energy use and enhance dyeing process skill. This study performs the experiment in which microwave is employed as heating condition in dyeing and figures out as color yield being promoted, bathochromic effect would be achieved. Applying microwaves in dyeing process is expected to lower the carbon emission, energy and time wasted, ultimately exalt economic efficiency.

• 한국염색가공학회지
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• 제8권2호
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• pp.56-63
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• 1996

Low-temperature plasma treatment or sputter etching is of interest as one of the techniques to modify polymer surface. In this study, poly(ethylene terephthalate)(PET), nylon 6 and cotton fabrics dyed three black dyes were subjected to low-temperature argon plasma and also sputter etching. In relation to bathochromic effect, the surface characteristics of the treated fabrics and films were investigated by means of critical surface tension, SEM and ESCA measurement. The depth of shade of fabrics more increased by the sputter etching technique than argon plasma treatment. Many microcraters on the fiber surface formed by the sputter etching resulted in increase of surface area of the fiber and wettability, but the hydrophobic group was increased by the results of ESCA analysis. In particular the change in reflective index of the fibers was much more effective than the chemical composition of the fiber surface on increasing of the depth of shade.

• 한국염색가공학회지
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• 제13권5호
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• pp.10-10
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• 2001

The Purpose of this study was to investigate spectrophotometric characteristics of Korean knotweed extracts. The properties were evaluated by it′s extracting solvent, effect of metallic ion, variations of pH values and effect of light exposure. The results were as following; The highest absorbance was found in methanol extract of Korean knotweed, while the lowest absorbance was carbon tetrachloride extract. The UV-vis. spectra of Korean knotweed colors in several solvents showed hypsochromic shift of n-π/sup ＊/ transition with the polarity of solvent. Absorbance and peak of UV-vis. spectra of Korean knotweed colors became lower and broader by addition of metallic ion. The light stability in irradiation with xenon ]amp of the color solution with Cu were higher than those of Al and Fe. The UV-vis. spectra of Korean knotweed extracts in various pH values showed bathochromic shift under alkaline condition, and their peaks disappeared after 5 hours exposure.

• 한국염색가공학회지
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• 제13권5호
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• pp.298-305
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• 2001

The Purpose of this study was to investigate spectrophotometric characteristics of Korean knotweed extracts. The properties were evaluated by it's extracting solvent, effect of metallic ion, variations of pH values and effect of light exposure. The results were as following; The highest absorbance was found in methanol extract of Korean knotweed, while the lowest absorbance was carbon tetrachloride extract. The UV-vis. spectra of Korean knotweed colors in several solvents showed hypsochromic shift of $n->\pi^*$ transition with the polarity of solvent. Absorbance and peak of UV-vis. spectra of Korean knotweed colors became lower and broader by addition of metallic ion. The light stability in irradiation with xenon ]amp of the color solution with Cu were higher than those of Al and Fe. The UV-vis. spectra of Korean knotweed extracts in various pH values showed bathochromic shift under alkaline condition, and their Peaks disappeared after 5 hours exposure.

• 한국염색가공학회지
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• 제2권3호
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• pp.8-13
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• 1990

In order to study the modification of wettability, tactility, and bathochromicity of the poly (ethylene Terephthalate) (PET) fabrics, low-temperature plasma$(O_2)$ has been irradiated on the PET fabrics in various conditions. The results obtained from this study were as follows; 1) The weight loss rate of plasma-treated PET fabrics is proportional to irradiation time and internal gas temperature of treating chamber. Also, the effect of weight loss is remarkable at gas pressure ranging from 3 torr to 5 torr. 2) The bathochromic effect of PET fabrics treated with low-temperature plasma$(O_2)$ was improved.

• 한국식품과학회지
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• 제28권2호
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• pp.352-359
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• 1996

새로운 천연식용색소원으로 기대되는 자색고구마 anthocyanin 색소의 안정성에 관한 기초연구로서 자색고구마 색소에 대한 pH, 당, 유기산, 금속이온, ascorbic acid및 광 등의 영향을 조사하였다 자색고구마 색소는 pH가 낮을수록 색깔의 강도가 높고 안정한 경향을 나타냈으며 , pH가 증가함에 따라 최대흡수파장이 장파장쪽으로 이동하는 bathochromic shift 현상을 나타냈다. 첨가한 당류 중 glucose는 색소의 안정성에 기여하였으며, sucrose와 fructose는 역효과를 나타냈다. 유기산의 첨가는 색소의 안정화에 크게 기여하였으며, ctric acid가 가장 효과적이었으며, 다음으로 malic acid, tartaric acid, succinic acid 순으로 나타났다. 금속이온은 색소의 안정성을 떨어뜨렸으나, $Al^{3+}$과 $Cd^{2+}은 자색고구마 anthocyanin색소의 안정성에 기여하는 것으로 나타났다. Ascorbic acid는 색소의 안정성을 저해하였으며 산소 존재하에서는 그 정도가 컸다. 자색고구마 색소의 안정성은 광에 의해 크게 저하되었는데, 형광보다 일광에 대한 영향이 더 켰으며, 저장시 광을 차단함으로써 안정성을 증진시킬 수 있었다.

• Bulletin of the Korean Chemical Society
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• 제26권11호
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• pp.1706-1710
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• 2005

The excited-state intramolecular proton transfer (ESIPT) fluorescence in the 2-(2'-hydroxyphenyl)benzoxazole (HBO) derivatives with different electron donor and acceptor substituents was studied by spectroscopic and theoretical methods. Changes in the electronic transition, energy levels, and orbital diagrams of HBO analogues were investigated by the semi-empirical molecular orbital calculation and were correlated with the experimental spectral position of ESIPT keto emission. It was found that the presence of substituents, regardless of their nature, resulted in the red-shifted absorption relative to HBO. However, the spectral change of the ESIPT fluorescence was differently affected by the nature of substituent: hypsochromic shift with electron donor and bathochromic shift with electron acceptor.