• Title/Summary/Keyword: 염색지

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Amine Gases Detecting Studies using the Compounds on the Urethane Nano Web and Laminating Film (아민 감지 화합물을 이용한 우레탄 나노웹과 라미네이팅 필름의 아민 가스 감지특성 연구)

  • Lee, Jun-Hee;Seo, Hye-Ji;Kang, Yoo-Jung;Lee, Do-Hyun
    • Textile Coloration and Finishing
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    • v.25 no.1
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    • pp.70-74
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    • 2013
  • For amine gas detection, we incorporated two well-known isomers, 2-chloro-3,5-dinitro-benzotrifluoride and 4-chloro-3,5-dinitro-benzotrifluoride, in polyurethanes. Nanoweb and thin film were prepared by electrospinning and lamination, respectively, in order to compare their sensing behaviors. Moreover, we studied photophysical property using UV-Vis spectrometer and observed surface area through scanning electron microscope to compare between the Nanoweb and thin film. We found out that nanowebs exhibited high sensitivity specifically to primary amine gas.

A Studies on the Surface Morphology and Fine Structure of PET Film Treated by DMF (DMF로 처리된 PET Film의 표면모폴로지와 미세구조에 대한 연구)

  • 서은덕
    • Textile Coloration and Finishing
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    • v.16 no.1
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    • pp.59-64
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    • 2004
  • As a simulation of solvent-assisted dyeing, the solvent effects on the structure of polyethylene terephthalate(PET) film treated by dimethylformamide(DMF) were investigated. The effects were evaluated by the atomic force microscopy(AFM) topographical changes and FT-IR spectrum analysis. PET films treated with DMF at $70^{\circ}C$ for several different treatment time(20, 40, and 60 min). AFM topography showed that, with increasing treatment time by DMF, PET surfaces became smooth due to the swelling phenomenon and the rigid structure changed into flexible state which was contributed to increase the surface area of PET films. FT-IR spectrum analysis showed that DMF and molecular chains of PET interacted each other via their polar carbonyl groups and that DMF also affected the out-of-plane bending vibration mode of phenyl ring of PET.

Comparative Studies on Morphology of Low Temperature Ar-Plasma-treated Polymer Surfaces (알곤저온플라즈마처리된 고분자표면의 모폴로지에 대한 비교연구)

  • Seo Eun-Deock
    • Textile Coloration and Finishing
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    • v.16 no.5
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    • pp.35-41
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    • 2004
  • Poly(ethylene terephthalate), polyimide(Kapton), and polypropylene surfaces were modified with argon low temperature plasma by RF glow discharge at 240m Torr, 40W to investigate the surface morphological changes due to the plasma treatment using atomic force microscopy(AFM). Analysis of the AFM images and Ra(average roughness) revealed that the plasma treatment resulted in significant ablation on the surfaces. The morphological changes and surface roughness, however, were different depending on material characteristics such as heat stability, presence of amorphous region, swelling phenomenon, and molecular structure of repeating unit. It was assumed that polypropylene due to its tertiary hydrogen was ablated easily compared to poly(ethylene terephthalate), and that polyimide was more resistant to the ablation than PET due to rigid skeleton of imide and stable phenyl ring structure.

Effect of Development and Application of Teaching-Learning Materials and Plan using Persimmon juice Dyeing on the Traditional Clothing Life-Culture Education (감즙염색을 이용한 학습자료와 교수-학습과정안 개발 및 적용이 전통 의생활문화 교육에 미치는 효과)

  • Park, Soonja;Yoo, Jiyeon
    • Journal of Korean Home Economics Education Association
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    • v.25 no.1
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    • pp.79-94
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    • 2013
  • In this study, the teaching-learning materials and the plan using persimmon juice dyeing, which is one of the traditional natural dyeing methods of Korea, were developed for the purpose of inspiring further awareness of our traditional clothing life-culture. A questionnaire was designed to make a survey on the educational effect, and t-test and Kruscal-Wallis test were conducted to test the significant differences between pre- and post-lessons. A correlation analysis between culture awareness and its education awareness was also done. These prototypes were applied to high school Technology Home Economics classes under the theme, 'Making living goods with persimmon juice dyed fabrics'. Examining the changes in students' awareness of traditional images, and changes in their interest and attitude towards learning in those classes led to the following results. First, as a result of applying LT cooperative learning in order for an understanding of the formation of clothing life-culture and the process of persimmon juice dyeing, many original handicrafts with modern sense were created. Second, a comparative analysis between pre- and post-lessons on the change in students' degree of awareness of traditional clothing life-culture and its education showed that students' awareness had risen after the class; the data was collected from three separate sample groups which had been clustered according to their initial degree of awareness, i.e. high, middle, and low, and the group that scored the lowest before the class showed the greatest improvement. Third, feedback surveys on 'Making living goods with persimmon juice dyed fabrics' classes returned with scores greater than 'moderate', thus revealing that the students' concern and interest towards traditional clothing life-culture hae been enhanced through the class experience. Their attitude had also become more positive. Fourth, since learners with more awareness of the traditional clothing life-culture also showed more awareness of the need for an education designed to promote the culture, a positive correlation between the two had been found. As explained above, the teaching-learning materials and the plan that had been developed for this study has caused a deeper understanding of the value and significance of the traditional natural dyeing and clothing life-culture, and has therefore brought about an educational effect that powers idea creation.

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Development of Marine Virus-like Particles Live/Dead Determination Method for the Performance Evaluation of Ballast Water Treatment System (선박평형수처리장치 성능 평가를 위한 해양 바이러스 생사판별 방법 개발)

  • Hyun, Bonggil;Woo, Joo-Eun;Jang, Pung-Guk;Jang, Min-Chul;Lee, Woo-Jin;Bae, Mi-Kyung;Shin, Kyoungsoon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.22 no.1
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    • pp.431-438
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    • 2021
  • To prepare more stringent regulations for USCG Phase II ballast water management, this study investigated the staining efficiency of SYBR Green I(SGI) and SYBR Gold(SG) on the virus-like particle (VLP). A dye with high staining efficiency was applied to the treated water that was passed through the ballast water treatment system (BWTS). VLP staining was observed most clearly under the 100-fold and 200-fold dilution of the stock solution when the volume of filtered samples was 0.5 mL to 2 mL. The staining efficiency of SGI and SG did not show a significant difference. On the other hand, the green fluorescence of viruses in the sample stained with SGI was more pronounced than in the samples stained with SG (expressed yellow fluorescence), making it easier to observe. The abundance of VLP in the test water and control water treatments that did not pass through the two types of BWTS (electrolysis type, UV + electrolysis type) was approximately 109 - 1010 VLP 100 mL-1. In contrast, no stained VLP was observed in the treated water treatments. Moreover, SGI was confirmed to be effectively stained under various salinity conditions, including seawater, brackish water, and freshwater. Further verification tests and development of staining methods under various BWTS are required, but the SGI staining method is believed to be a good alternative to the VLP live/dead determination of the USCG Phase II type approval test.

The Research on Reproduction of White Bamboo Paper in Ming-Qing Dynasty : Reproduction of Paper Woven Painting and Repair Paper (명-청시대의 백죽지(白竹紙) 재현 연구 : 지류문화재 보수지(補修紙)와 지직화(紙織畵) 재현을 중심으로)

  • Lee, Sang-Hyun
    • Journal of Conservation Science
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    • v.23
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    • pp.39-51
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    • 2008
  • Adding chemical additives in bamboo paper making procedure in China became common in last decades to increase productivity. Supply of repair paper for paper based artefacts became more and more difficult due to this tendency. Furthermore, stains and spots on paper which happen to appear during dying procedure make it difficult to use modern bamboo paper for repair treatment. In this research, lime fermentation and sun bleaching were main elements which affect texture and color of paper. Impurities, however, add some effects on paper quality. Less thouroughly washed raw materials after fermentation also affects texture of paper substrate. One most significant impurity is lime. Minimum residue of lime can make stains and spots after dying. Reproduction of white bamboo paper would become useful resource in various conservation treatments as a repair paper, and also, for reproduction of paper woven painting. However, further research to improve quality at early stage of paper making procedure in China required.

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Effects of Microcurrent and High Voltage Pulsed Galvanic Current Stimulation on Fibular Fracture Healing of the Rabbits (미세전류자극과 고전압 맥동직류 통전이 토끼의 비골 골절치유에 미치는 효과)

  • Ko, Seung-Hyun;Yoon, Bum-Chul;Kim, Ji-Sung;Min, Kyung-Ok
    • The Journal of the Korea Contents Association
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    • v.11 no.10
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    • pp.286-292
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    • 2011
  • This study investigated the degree of fracture healing using cathode stimulation of microcurrent, cathode and anode stimulation of High Voltage Pulsed Galvanic Current (HVPGC). Measures were performed by X-ray test and Hematoxylin-Eosin stain and Masson's trichrome stain and osteocalcin-positive immunoreactivity. In the measure of X-ray, microcurrent stimulation group revealed more rapid recovery than the groups of HVPGC's cathode and anode stimulation in bone union degrees. Microcurrent group showed significant difference statistically (p<0.05). However, the groups of HVPGC's cathode and anode stimulation didn't show significant difference statistically(p>0.05). In the histologic examination with Hematoxylin-Eosin and Masson's trichrome, microcurrent stimulation group was observed more proliferation of irregular woven bones than the groups of HVPGC's cathode and anode stimulation. Osteocalcin-positive immunoreactivity was observed more osteoblast, osteocyte, osteoclast, bone matrix than the groups of HVPGC's cathode and anode stimulation. Microcurrent stimulation can be considered an effective way during healing of fresh fracture and it can show more effective method than HVPGC's cathode and anode stimulation in the fracture healing.

A Simulation Modeling and Analysis of Capital Investment using AIM (AIM을 이용한 염색/가공 설비 투자 분석 시뮬레이션)

  • 최성훈
    • Journal of the Korea Society for Simulation
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    • v.4 no.1
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    • pp.87-97
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    • 1995
  • Simulation techniques are used to improve the productivity of a textile factory. A simulation model is developed for the analysis of investment for dyeing process equipment, such as dryers and bleachers. For modeling and analysis, AIM (Analyzer for Improving Manufacturing) is used. AIM is a manufacturing oriented simulation software developed by Pritsker Corp. AIM provides interactive model building and simulation, automatic animation, and powerful graphic outputs. thereby, drastically reducing modeling efforts and also enhancing communication capabilities.

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Basic Study of Weaving Structure and Durability for Fabric-type ECG Sensor Design (직물형 ECG센서 설계를 위한 제직구조 및 내구성에 대한 기초연구)

  • Ryu, Jong-Woo;Jee, Young-Joo;Kim, Hong-Jae;Yoon, Nam-Sik
    • Textile Coloration and Finishing
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    • v.23 no.3
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    • pp.219-226
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    • 2011
  • Recently, study of functional clothing for vital sensing is focused on improving conductivity and decreasing resistance, in order to enhance the electrocardiogram(ECG) sensing accuracy and obtained stable environmental durability on operation condition. In this study, four ECG fabrics that having different componnt yarns and weaving structures were produced to analyze their environmental durabilities and electric properties under general operation conditions including different physical and chemical stimulation. For outstanding electric properties and physical properties, the optimized ECG sensing fabric should consist of a fabric of 2 up 3 down twill structure containing 210de silver-coated conductive yarns and polyester yarn in warp and weft directions respectively. The selected fabric has $0.11{\Omega}$ which is relative lower resistance than otherwisely produced fabrics under ECG measurement condition. And it has 7% stable resistance changes under 25% strain and repeated strain.

Antibacterial Properties of PU/$TiO_2$ Hybrid membrane Films after Photodepositing of Silver (은(Ag) 광증착에 의한 폴리우레탄/$TiO_2$ 하이브리드 멤브레인 필름의 항균특성)

  • Cho, Seong-Min;Min, Byung-Gil;Ji, Kwang-Hwan
    • Proceedings of the Korean Society of Dyers and Finishers Conference
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    • 2012.03a
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    • pp.50-50
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    • 2012
  • 투습방수필름으로 많이 사용되고 있는 폴리우레탄(PU)에 광촉매 기능성을 가지고 있는 나노-$TiO_2$(Degussa P25)를 1~10wt% 복합시킨 후, 은(Ag)이온 수용액에서 자외선 조사에 의한 광증착시키는 과정을 거쳐 은이 도핑된 PU/$TiO_2$/Ag 하이브리드 멤브레인 필름을 제조하였다. (주)비에스지에서 제공받은 PU/DMF/MEK 용액에 $TiO_2$를 초음파로 균일하게 분산배합한 후, 필름캐스팅하여 만든 필름을 AgNO3 수용액에 침지시키고 254nm의 자외선을 30~120초 동안 조사하는 광증착법으로 은을 환원시켜 도핑시켰다. 은 도핑된 하이브리드 필름을 Shaking flask method에서 폐렴간균, 황색포도상구균에 대한 항균성을 측정하고, Clear zone method에서 대장균에 대한 항균성을 측정한 결과, $TiO_2$ 함량이 3wt% 이상이고 UV조사시간이 60초 이상인 경우 99.9% 이상의 항균성을 나타내는 것을 확인하였다.

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