• 복식문화연구
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• 제24권6호
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• pp.777-787
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• 2016

This study was carried out in order to provide useful data for planning fabrics of summer eco-friendly fashion products. The fabrics used in this study were four cellulose fibers: cotton, cotton/mulberry blended, flax, and flax/lyocell blended. Dyeing with natural indigo was carried out under three different reducing conditions (i.e., general, eclectic, and eco-friendly) that have different reducing agent and pH levels, and hydrosulfite and glucose were used as a reducing agent. The dye uptake (K/S value) of fabrics dyed with natural indigo by a reducing condition was the highest at 660nm. Regardless of the fabrics, dye uptake was the highest under the general reducing condition and the lowest under the eco-friendly reducing condition. Under different reducing conditions, the dye uptake of natural indigo fabrics with the maximum absorption wavelength indicated a difference. The colorfastness of cellulose fabrics that were dyed with natural indigo had a rate of 4 to 5 except for rubbing fastness, which indicated good colorfastness. Additionally, natural indigo-dyed cotton and flax fabrics had good antibiosis. When the color characteristics of fabrics dyed with natural indigo were measured, all of the three reducing conditions created purple blue (PB) colors, and the color characteristics of dyed fabrics by reducing condition and fabric showed significant differences.

• Current Optics and Photonics
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• 제1권1호
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• pp.12-16
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• 2017

Color sensor systems based on M13 bacteriophage are being considerably researched. Although many studies on M13 bacteriophage-based chemical sensing of TNT, endocrine disrupting chemicals, and antibiotics have been undertaken, the fundamental physical and chemical properties of M13 bacteriophage-based nanostructures require further research. A simple M13 bacteriophage-based colorimetric sensor was fabricated by a simple pulling technique, and M13 bacteriophage was genetically engineered using a phage display technique to exhibit a negatively charged surface. Arrays of structurally and genetically modified M13 bacteriophage that can determine the polarity indexes of various alcohols were found. In this research, an M13 bacteriophage-based color sensor was used to detect various types of alcohols, including methanol, ethanol, and methanol/butanol mixtures, in order to investigate the polarity-related property of the sensor. Studies of the fundamental chemical sensing properties of M13 bacteriophage-based nanostructures should result in wider applications of M13 bacteriophage-based colorimetric sensors.

• 공업화학
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• 제35권2호
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• pp.67-78
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• 2024

흡광은 측정이 간편하고 해석의 직관성이 높다는 점에서 생화학 기반 분석법의 신호로서 강점을 가진다. 흡광을 가지는 물질 중에서 금 나노입자는 화학적 안정성, 생물학적 친화성, 가시광선 범위에서 야기되는 국소 표면 플라즈몬 공명(localized surface plasmon resonance, LSPR)에 의한 독특한 광학적 특성 등의 유용한 성질을 지니며, 특정 표적 물질에만 유효한 다른 발색물질과 비교해 항체나 압타머 등 다양한 검출 활성물질과 접합이 용이하여 확장성을 가진다. 특히, 기질의 산화로 발색을 야기하는 효소 기반 발색법에 비해 낮은 가격, 쉬운 입자 합성, 높은 환경안정성 등의 장점으로 인해 비색화 분석법의 신호물질로서 광범위하게 연구되고 있다. 본 총설에서는 이와 같은 금 나노입자를 신호물질로 활용하는 다양한 전략을 최근의 연구들을 중심으로 요약 정리하였으며, 입자의 형태에 광학 특성이 영향을 받는 금 나노입자의 특징에 착안하여 신호생성 시에 활용한 금 나노입자의 형태 제어 전략을 기준으로 문헌들을 분류하고 검토하였다. 이를 통해 이미 오랜 기간 활용되어온 금 나노입자가 현재에도 흡광 신호물질로서 여전히 활발하게 연구되고 있다는 사실을 고찰하고, 향후에도 광범위하고 지속적으로 개선될 여지를 가진다는 점을 확인하였다.

• 센서학회지
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• 제29권5호
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• pp.360-364
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• 2020

In this study, the colorimetric sensor, polyester (PET) fabric dyed with lead (II) acetate (Pb(C₂H₃O₂)₂), was fabricated and characterized for the detection of the hydrogen sulfide (H₂S). The surface morphology of the fabric was determined using scanning electron microscope and energy-dispersive X-ray spectroscopy. The optical properties of the fabric were evaluated by measuring the variation in the blue value of an RGB sensor. The fabric showed a significant color change, high linearity (R² : 0.98256), and fast response time (< 1.0 s) when exposed to H₂S. This is because the sensor is highly porous and permeable to the gas. The fabric can not only be used as a hydrogen sulfide sensor but also be used to detect and prevent H₂S influx using sticky tape on pipelines.

• 한국인쇄학회지
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• 제21권2호
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• pp.31-42
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• 2003

The optimum color proofing system with the similar colorants to the printing system has to be used in high quality offset color printing. And so, the evaluation on color reproduction properties of the colorants for proofer and press are very important. In this paper, the optimum color proofing method is recommended by means of colorimeric comparative evaluation on the color reproduction properties such as color gamut, color difference, hue error of the colorants for the proofing system of CRT monitor, inkjet printer, dye sublimation type digital proofer, and the actual printing system of offset press.

• 복식문화연구
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• 제24권5호
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• pp.577-587
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• 2016

Natural dye extracted from Salicornia bigelovii was applied to silk fabrics by dip dyeing process. The dyeing properties and the functionalities of the silk fabrics were determined. Factors affecting the dyeing properties such as dyestuff concentration, temperature, time and pH were studied. The colorimetric parameters $L^*$, $a^*$, $b^*$, and H, V/C values were measured to select the optimal mordanting conditions. The color-fastnesses of the dyed and mordanted fabrics were estimated for practical use; in addition, the antibacterial property, ultraviolet protection properties were evaluated. The dyeabilities of silk increased depending on the increasing dye concentration, dyeing time, and dyeing temperature. And optimum dyeing results were achieved when dyeing with 300% (o.w.f.) of dye concentration at $90^{\circ}C$ for 100 minutes and at pH 3. The dyed silk fabrics without mordants produced yellow (Y) color and showed yellow (Y) or green yellow (GY) colors depending on the mordants type. The light fastness of dyed and Al mordanted silk fabrics were found to be excellent, and the drycleaning and rubbing fastness were good. The dyed silk fabrics showed no antibacterial property, but Al and Cu mordanted silk fabrics showed 99.9% reduction rate. The ultraviolet protection properties of the dyed silk fabric was improved. And the ultraviolet protection properties of mordanted samples showed very good ultraviolet protection properties.

• 대한치과교정학회지
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• 제23권3호
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• pp.327-340
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• 1993

The purpose of this study was to estimate the possibility of practical application of TiN ion-plating method on orthodontic appliances. TiN was coated on the surface of orthodontic stainless steel roll band by means of ion-plating method, and colorimetric properties of its obtained TiN film were investigated by using color analyzer. Also its corrosion and discoloration properties were compared with those of non ion-plated stainless steel roll band by using immersion test, which was done in 1N HCl solution for 10 days. Both weight changes and surface corrosion appearances of specimens for each day were respectively investigated by using electronic weighing machine and SEM(Scanning Electron Microscope). The discoloration degress of TiN-coated specimens immersed in 1N HCl solution were investigated by using color analyzer and then judged by N.B.S.(National Bureau of Standard) Unit. The results of this study were summarized as follows. o TiN ion-plated films showed the hue of 5Y, the value of 7, and the chroma of 3 by Munsell notations. o The weight losses and surface changes of TiN ion-plated specimens immersed in 1N HCl solution were less than those of non ion-plated specimens. It was shown, therefore, that the corrosion resistance was significantly improved by TiN ion-plating. o The discoloration degrees of non ion-plated specimens were too significant to be examined by color analyzer, while those of TiN ion-plated specimens were slight when judged by N.B.S. Unit. It was also apparent, therefore, that the anti-discoloration property was significantly improved by TiN ion-plating.

• 감성과학
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• 제19권3호
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• pp.3-14
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• 2016

본 연구에서는 천연염료와 직물종류, 매염유무의 세 가지 조건에 대한 천연염색직물의 물리적 색채 특성을 측정하고, 심리적 색채감성평가를 실시하였다. 이에 대하여 염료의 종류, 직물의 종류, 매염제의 유무에 따른 물리적 색채 특성 차이를 살펴보기 위하여 분산분석을 실시하였으며, 상관관계분석을 통해 물리적 색채 특성과 심리적 감성간의 관계를 분석하고, 회귀분석을 이용해 천연염색에 대한 예측식을 도출하였다. 최종적으로, 천연염색직물에 대한 감성 이미지 맵을 제안하기 위하여 다차원 척도법(Multidimensional Scaling: MDS)을 이용하였다. 이를 통해, 대표적으로 남성적인(masculine)인 이미지에는 무거운, 딱딱한 색채감성을 갖는 치자염색이, 여성스러운(feminine) 이미지에는 밝고 투명하고 부드러우면서 가벼운 색채감성을 갖는 소목과 락, 치자청을 사용한 염색이 적합하다. 내츄럴(natural)한 이미지를 나타내기 위해서는 은은한 색채감성의 쑥 염색이 적절하고, 화려한 색채감성의 쪽으로 염색을 한다면 액티브(active)한 이미지를 가질 수 있을 것이라 예측 가능하다.

• 멤브레인
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• 제31권2호
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• pp.87-100
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• 2021

최근 오염물질 수위의 급격한 상승세와 더불어 가속화되는 자연환경 파괴로 인해 다양한 환경 속에 쌓이는 오염물질의 검출 및 모니터링은 현대 사회의 중요한 미션 중 하나로 자리 잡았다. 본 논문에는 멤브레인 기반의 광학 센서를 활용한 미량 오염물질 검출에 대한 최근 연구 동향이 요약되어 있다. 본 논문에 포함된 연구들은 섬유소로 이루어진 멤브레인을 검출을 위한 플랫폼으로 사용하였으며, 금속 나노 입자나 형광단을 색 변화 검출을 위해 이용하였다. 제조된 광학 센서들은 모두 적절하거나 특출한 수준의 감도를 보였고, 대부분의 센서에서 타겟 물질이 아닌 이온이나 물질에는 반응하지 않는 정확성 또한 확인되었다. 검출 플랫폼으로 이용된 섬유소 멤브레인의 물리적, 화학적 특성들은 멤브레인 합성 방법이나 색 변화를 위한 광학 물질 등을 바꾸는 방법을 통해 각 연구의 목적에 맞추어 최적화될 수 있었다. 또한, 멤브레인을 기반으로 하여 제조된 센서들은 운반이 편리하고 기계적 성질이 강해 현장에서 바로 오염물질을 검출할 수도 있다는 사실이 제시되었다. 이러한 장점 덕분에 멤브레인 기반 센서들은 식용수에서 검출된 중금속의 정량화와 자연 수질환경에서 발견되는 미량 중금속 및 유독성 항생제의 감지 등 다양한 목적을 위해 활용될 수 있었다. 몇몇의 연구에서 제조된 센서들은 항균성이나 재활용성 또한 나타내었다. 대부분의 센서들이 타겟 물질을 감지한 후 육안으로도 식별 가능한 색 변화를 보였으나, 본 논문에 포함된 많은 연구들은 형광 발산, UV-vis 분광학, RGB 색 강도 차이 등을 비교 분석한 더 상세한 검출 결과를 제시하였다.

• 한국염색가공학회지
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• 제25권1호
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• pp.18-24
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• 2013

A water soluble spironaphthoxazine (SPO) was synthesized, and its spectral properties were determined. Under UV irradiation, colorless SPO shows intensive blue color while the intensity of its initial fluorescence decreased. In addition, SPO also exhibited high sensitivity to pH stimuli both in colorimetry and fluorometry distinguishing from the spectral appearance observed under UV irradiation. Further, integrating these two optical characteristics a three-state switching system can be established, and all interconversions can be observed by naked-eye.