• 한국염색가공학회지
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• 제10권6호
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• pp.20-26
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• 1998

100％ viscose rayon fabric was treated with 1,2,3,4-butanetetracarboxylic acid (BTCA) by pad-dry-cure process in the presence of various catalysts. The dimensional stability, mechanical properties and hand values of fabric treated with BTCA were investigated. The ester-crosslinking reaction was influenced by the concentration of BTCA and type of catalyst. The fabric treated with BTCA was comparable or superior to that treated with conventional crosslinking agents such as dimethyloldihydroxyethyleneurea and 4,5-dihydroxy-1,3-dimethyl-2-imidazolidinone in respect of wrinkle recovery, shrinkproof property, retention of strength, and hand values. But in yellowing of fabric, the fabric treated with BTCA was inferior to that treated with conventional crosslinking agents. The fabric treated with BTCA/sodium formate was inferior to that treated with BTCA/sodium hypophosphite in respect of WRA, but had better strength retention and whiteness.

• 한국의상디자인학회지
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• 제5권3호
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• pp.7-14
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• 2003

Fabrics dyed with artemisia extract have quite natural and elegant tones of color. This study purposed to find the best one for dyeing among artemisia collected in the four seasons in order to develop a more efficient method of dyeing with artemisia. As for the method of research, the researcher dyed wool fabric and silk fabric with artemisia, and measured dyeability according to the number of repeats of dyeing, coloration by post-mordant, color fastness to washing, color fastness to dry cleaning and color fastness to light. The results are as follows. 1. In dyeing with artemisia, dyeability was improved as the number of repeat of dying increased, and it was higher in wool fabric than in silk fabric. 2. Among artemisia collected in the four seasons, autumn artemisia had dyeability much inferior to that of artemisia from the other seasons, and winter artemisia had the best dyeability. 3. According to the result of treating fabric with post-mordant, the dyeability was improved significantly, and coloration was most remarkable when copper and iron mordant were used. 4. The color fastness to washing and color fastness to dry cleaning of fabric mordanted with artemisia were as high as grade 4-5 and grade 5 respectively. The color fastness to light was highest in winter artemisia as grade 4.

• 원예과학기술지
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• 제34권5호
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• pp.665-676
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• 2016

본 연구에서는 기후변화로 인한 온도상승에 따른 과실 착색 불량 등의 문제를 해결하는데 필요한 기초자료를 제공하고자 고온에 의해 과피에서 발현되는 유전자들의 발현 양상 특성을 분석하였다. '하례조생'과 '부지화' 감귤 과실을 숙기 별로 수확하여 온도 조건(25, 30, $35^{\circ}C$)을 처리하고 당대사, 과피 착색, 세포벽 연화에 관련된 유전자들의 발현을 확인하였다. 유전자들은 '하례조생'과 '부지화'에서 각각 다른 양상으로 발현하였는데, beta-amylase(BMY), phenylalanine ammonia-lyase(PAL), chalcone synthase(CHS), flavanone 3-hydroxylase(F3H) 등의 유전자 발현은 대체적으로 유도되었고, polygalacturonase(PG) 유전자는 발현이 감소되는 경향이었다. '하례조생'은 과피 착색과 관련된 유전자인 CHS와 F3H는 성숙이 진행된 2-3단계에서 $25^{\circ}C$에 비해 고온에서 유전자 발현이 감소하였으며, PAL과 stilbene synthase(STS) 유전자는 $25^{\circ}C$에 비해 $30-35^{\circ}C$ 처리구에서 유전자 발현이 증가하였다. 2-3단계의 '부지화'에서는 BMY 유전자가 $25^{\circ}C$에 비해 $30-35^{\circ}C$에서 유전자 발현이 증가하였으며, F3H와 STS 유전자의 발현은 과실 성숙단계에서 모두 감소하는 경향이었고 온도의 영향은 크지 않았다. 성숙 1, 2단계에서 유전자의 발현 양상은 두 품종 모두에서 대체로 비슷한 경향이었는데, 3단계에서 '부지화' 과실의 유전자 발현은 '하례조생'과는 다르게 감소하는 경향이었다. 성숙이 진행되는 감귤류인 '하례조생'에서 '부지화'에 비해 7종류의 유전자의 발현이 많았으며, 고온에 따른 반응의 차이도 크게 나타났다. 본 연구에서 도출한 결과를 바탕으로 과실의 전사체를 분석함으로써 고온에 의한 감귤 과실의 성숙불량 문제를 이해하는 주요한 정보를 획득할 수 있을 것이다

• 한국염색가공학회지
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• 제28권2호
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• pp.118-123
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• 2016

The use of natural organic dyes obtained from renewable resources such as plants and trees has the potential for not only preserving petrochemicals but also all-endangered environment for coming next generations. In spite of inferior fastness, natural dyes can be employed in the colouration of natural as well as synthetic fibers. Recently, the potentiality of using natural dyes in colouration with additional UV-protection and antimicrobial properties has been reported. This study is aimed to investigate the effect of Zinc compounds compared to another metallic compounds as mordants on the dyeing properties of natural dye extracted from mulberry leaves and coffee. In this study, the results showed Zinc compounds was expose that is more similar than other mordants in washing fastness through a repeated experiment. Also, Zinc is the environmental impact is less material compared with other mordants, essential edibility minerals ingredient that is necessary in human body.

• 한국염색가공학회지
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• 제21권3호
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• pp.37-42
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• 2009

The low melting PET yarn has sheath/core structure: sheath portion consists of low melting point PET and core portion is regular PET. Dyeing properties of fabric made from low melting PET yarn were investigated at different dyeing temperatures. It was found that the exhaustion yield on the low melting PET fabric was higher than on regular PET fabric. The total K/S value of the dyed low melting PET fabric increased as heat setting temperature increased above $150^{\circ}C$ because the sheath portion of the low melting yarn melted. Although fastness to light of the low melting PET fabric was similar to regular PET fabric, fastness to washing was inferior to regular PET fabric by 1 grade.

• 한국염색가공학회지
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• 제15권2호
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• pp.76-85
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• 2003

In this study, a continuous stabilization process is used to make high-performance carbon fiber from polyacrylonitrile(PAM)-based fibers. The effect of oxygen content of PAN-based fiber on the stabilization process and the properties of the resultant carbon fibers is investigated. In order to research the progress of stabilization reaction FT-IR, elemental analysis, density, DSC, etc are used. Stabilization is carried out in air atmosphere from the 200 to $300^\circ{C}$ temperature range. An increase of PAN-based fibers diameter reduces the oxygen content during the continuous stabilization process. A higher oxygen content increase the density, tensile strength and modulus in the resultant carbon fibers. The most appropriate oxygen content in the stabilized fiber should be about 12%. Fibers having more than 2% oxygen content yield carbon fibers with inferior properties. Those carbon fibers also have sufficient commercial availability.

• 한국염색가공학회지
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• 제26권3호
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• pp.218-229
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• 2014

The wearing comfort of garment is governed by two kinds of characteristics such as moisture and thermal transport properties and mechanical properties of fabrics. The porosity influenced by yarn and fabric structural parameters is known as main factor for wearing comfort of garment related to the moisture and thermal transport properties. This study investigated effect of porosity of composite yarns to the moisture and thermal comfort properties of composite fabrics made of hollow composite DTY and ATY yarns. The theoretical porosity and pore size were inversely proportional to cover factor of fabric, but cover factor was not correlated with experimental pore size. The wicking property of hydrophobic PET filament fabric showed inferior result irrespective of porosity, pore size and cover factor. The drying rate was superior at composite fabrics with high pore size and low cover factor, and pore size was dominant factor for drying property. On the other hand, thermal conductivity of composite fabric was mainly influenced by cover factor and not influenced by porosity. Air permeability was influenced by both porosity and cover factor and was highly increased with increasing porosity and decreasing fabric cover factor.

• 한국염색가공학회지
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• 제28권1호
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• pp.48-56
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• 2016

Improvement of heat sink technology related to the continuous implementation performance and extension of device-life in circumstance of easy heating and more compact space has been becoming more important issue as multi-functional integration and miniaturization trend of electronic gadgets and products has been generalized. In this study, it purposed to minimize of decline of the heat diffusivity by gluing polymer through compounding of inorganic particles which have thermal conductive properties. We used NH-9300 as base resin and used inorganic fillers such as silicon carbide(SiC), aluminum nitride(AlN), and boron nitride(BN) to improve heat diffusivity. After making film which was made from 100 part of acrylic resin mixed hardener(1.0 part more or less) with inorganic particles. The film was matured at $80^{\circ}C$ for 24h. Diffusivity were tested according to sorts of particles and density of particles as well as size and structure of particle to improve the effect of heat sink in view of morphology assessing diffusivity by LFA(Netzsch/LFA 447 Nano Flash) and adhesion strength by UTM(Universal Testing Machine). The correlation between diffusivity of pure inorganic particles and composite as well as the relation between density and morphology of inorganic particles has been studied. The study related morphology showed that globular type had superior diffusivity at low density of 25% but on the contarary globular type was inferior to non-globular type at high density of 80%.