• 보존과학회지
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• 제37권2호
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• pp.120-134
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• 2021

조선 말기 방한용 깔개인 모담(毛毯)이 창덕궁 성정각의 해체 공사 중 발견되었다. 문헌기록에 비해 현전하는 조선시대 모직물 유물이 많지 않아 유물로서 가치가 높다. 특히 1907년 창덕궁 성정각을 수리한 기록이 있어, 모담은 19세기 말 또는 20세기 초에 제작된 것으로 생각된다. 출토 모담은 자적색 계열의 바탕 직물로 위에 황색, 홍색 등으로 선염한 색사를 표면에만 삽입하여 문양을 시문하였다. 모담의 식서부분은 S연의 면사가 확인되었으며, 지경사는 Z연의 황마사, 지위사는 S연의 황마사, 문경사는 S연의 모사를 사용했다. 특히 무늬는 루프파일의 색사로, 색사의 경계면에서 일부 컷 파일이 확인되나 지위사로 고정되어 표면에 거의 드러나지 않는 다. 황마사와 모사를 사용한 것은 18세기 중엽 유럽의 브뤼셀 카펫의 영향을 받은 것으로 짐작된다. 모담의 문양을 밝히는 데 한계가 있으며 다만 문양이 부분적으로 반복됨을 알 수 있다. 이상의 연구내용을 도출하기 위해 문헌과 회화자료 외에 현미경 분석, 적외선 분광분석을 실시하였다. 또한 유물에 사용된 염료를 밝히기 위해 색도측정을 토대로 자외-가시광 분광분석을 실시하여 천연 염색한 직물 샘플에 대한 교차분석을 시도하였다. 그 결과 모담의 녹색 모사는 쪽을 사용하지 않았으며, 자적색의 바탕조직은 소목으로 염색한 것으로 추정할 수 있다.

• Composites Research
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• 제20권2호
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• pp.32-38
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• 2007

Natural fibers can refer to all types of fibres only produced by nature. Their lengths vary from particles to long strands. Natural fibers are categorized roughly by six types, depending on the types of sources; base, leaf, seed, grasses, fruit and wood. Of these fibers, jute, flax, sisal and ramie are the most commonly used as reinforced materials in preparing polymer composites. In development and improvement of these composites, many studies have been implemented to overcome the drawbacks such as incompatibility, moisture problems and so on. The range of industry sectors of natural fiber-reinforced polymer composites becomes more extensive gradually and many of the companies all over the world are engaged in fabrications or applications. This paper mainly discussed the recent status of the domestic/overseas market and research issues of natural fiber-reinforced polymer composites. We made an exception of wood-polymer composites market which have played a great role because they had been often dealt with.

• 대한토목학회논문집
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• 제31권2A호
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• pp.105-113
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• 2011

본 연구는 보강섬유의 종류(마섬유, 펄프섬유, PVA섬유, 나이론섬유) 및 혼입률(0.0%, 0.1%, 0.2%, 0.3%)이 다공성 식생콘크리트의 역학적 특성과 내약품성에 미치는 효과를 평가하였다. 시험은 섬유의 종류 및 혼입률의 변화에 따른 다공성 식생콘크리트의 압축강도, 공극률, pH, 휨강도 및 내약품성 특성을 분석하기 위하여 수행하였다. 섬유의 종류 및 혼입률은 다공성 식생콘크리트의 압축강도, 공극률 및 내약품성에 영향을 미쳤다. 섬유의 혼입률이 증가할수록 압축강도, 휨강도 및 공극률은 증가하였다. 그렇지만 다공성 식생콘크리트의 pH 값과 내약품성은 섬유의 종류 및 혼입률의 변화에 큰 영향이 없었다.

• 한국환경복원기술학회지
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• 제9권1호
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• pp.1-13
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• 2006

The recent environmental protection issue has diminished the supply of sand for soft ground improvements so much that the prices of sand have shown a sudden rise. Plastic material is one of substitutes for sand material, but plastic is nonperishable and doubtable if it has potential environmental hormone disrupting substances. Moderate-priced natural fiber drain board made with coconut coir and jute filter are in the spotlight recently as an alternative material for sand and plastic drain board etc. Natural fiber drain has not only competitive price but also a characteristic of assimilation into the soils after finishing of its own function. Discharge capacity of the fiber drain board evaluated by triaxial type discharge capacity test was relatively lower than that of plastic drain board. Nevertheless, settlement and pore pressure dissipation behaviors of the fiber drain board and the plastic drain board which were installed in the clayey soil during the composite discharge capacity test were almost similar. It was also found that biodegradation of the fiber drain board was in progress until 18 month after installation in the clayey soil, but they had still enough engineering properties to use at field.

• Carbon letters
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• 제13권3호
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• pp.161-166
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• 2012

Carbon materials were synthesized by pyrolysis from fibers of Corn-straw (Zea mays), Rice-straw (Oryza sativa), Jute-straw (Corchorus capsularis) Bamboo (Bombax bambusa), Bagass (Saccharum officinarum), Cotton (Bombax malabaricum), and Coconut (Cocos nucifera); these materials were characterized by scanning electron microscope, X-ray diffraction (XRD), and Raman spectra. All carbon materials are micro sized with large pores or channel like morphology. The unique complex spongy, porous and channel like structure of Carbon shows a lot of similarity with the original anatomy of the plant fibers used as precursor. Waxy contents like tyloses and pits present on fiber tracheids that were seen in the inherent anatomy disappear after pyrolysis and only the carbon skeleton remained; XRD analysis shows that carbon shows the development of a (002) plane, with the exception of carbon obtained from bamboo, which shows a very crystalline character. Raman studies of all carbon materials showed the presence of G- and D-bands of almost equal intensities, suggesting the presence of graphitic carbon as well as a disordered graphitic structure. Carbon materials possessing lesser density, larger surface area, more graphitic with less of an $sp^3$ carbon contribution, and having pore sizes around $10{\mu}m$ favor hydrogen adsorption. Carbon materials synthesized from bagass meet these requirements most effectively, followed by cotton fiber, which was more effective than the carbon synthesized from the other plant fibers.

• Advanced Composite Materials
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• 제16권4호
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• pp.299-314
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• 2007

In the present study, natural fibers (jute, kenaf and henequen) reinforced thermoplastic (poly(lactic acid) and polypropylene) and thermosetting (unsaturated polyester) matrix composites were well fabricated by a compression molding technique using all chopped natural fibers of about 10 mm long, respectively. Prior to green composite fabrication, natural fiber bundles were surface-treated with tap water by static soaking and dynamic ultrasonication methods, respectively. The interfacial shear strength, flexural properties, and dynamic mechanical properties of each green composite system were investigated by means of single fiber microbonding test, 3-point flexural test, and dynamic mechanical analysis, respectively. The result indicated that the properties of the polymeric resins were significantly improved by incorporating the natural fibers into the resin matrix and also the properties of untreated green composites were further improved by the water treatment done to the natural fibers used. Also, the property improvement of natural fiber-reinforced green composites strongly depended on the treatment method. The interfacial and mechanical results agreed with each other.

• 한국건축시공학회지
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• 제16권3호
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• pp.201-209
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• 2016

본 연구에서는 천연섬유인 KN섬유를 섬유보강 콘크리트에 사용하기 위한 방안으로, KN섬유의 혼입량 및 유기질 섬유보강재 종류에 따른 콘크리트의 공학적 특성을 실험적으로 확인하였다. 이러한 연구를 위하여 KN섬유의 혼입량 4종류(0, 0.3, 0.6 및 $0.9kg/m^3$) 및 비교용 섬유보강재(JT, CEL, PP 및 NY섬유) 4종류를 대상으로 슬럼프, 공기량, 소성수축 시험 및 압축강도, 인장강도, 휨강도, 그리고 건조 수축량, 탄산화 깊이 등을 실험하였다. 실험결과, KN섬유의 혼입량 $0.6kg/m^3$일 때, 인장강도 및 휨강도 증진에 매우 효과적이며, 소성수축 균열 및 건조수축량 저감, 탄산화 깊이에도 큰 효과가 있는 것으로 나타났다. 또한, 동일한 혼입량($0.6kg/m^3$)을 사용한 유기질 섬유보강재와의 비교실험에서 탄산화 깊이를 제외한 인장강도 및 휨강도, 소성수축 균열 및 건조수축량 저감 등에 KN섬유가 우수한 것으로 나타났다. 따라서, KN섬유의 혼입량 $0.6kg/m^3$를 사용하여 섬유보강 콘크리트에 적용하는 것이 콘크리트의 성능 및 환경성, 경제성 측면에서 가장 적합한 것으로 나타났으며, 향후 현장적용성에 대한 지속적인 연구가 요구된다.

• 한국염색가공학회지
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• 제23권1호
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• pp.1-10
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• 2011

Research information related to application of enzyme as pretreatment and subsequent functional finishing on wool blended textiles for imparting multi-functional properties is still scanty. Yarn-blended wool/cotton fabric was pretreated with both a cellulase (Bactosol-CA) or a protease (Savinase-16.0LEx) in individual, subsequently finished with Synthappret-BAP and ${\beta}$-cyclodextrin based combination to impart anti-shrink, anti-microbial, softening and anti-crease properties. The performance of the finished fabrics depended on type of finishing combinations applied rather than enzyme pretreatment. Savinase pretreatment followed by Synthappret+Ceraperm-MW combination finishing impart both anti-shrink property as well as softening, while Bactosol pretreatment followed by ${\beta}$-cyclodextrin and sanitize combination finishing impart antimicrobial activity as well as anti-shrink finish to the wool/cotton blend fabric.

• KIEAE Journal
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• 제13권4호
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• pp.103-112
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• 2013

The Federal Democratic Republic of Nepal(Nepal) is one of the poorest country in the world. People in Nepal are having lots of housing problems including the lack of housing provision. Even Habitat for Humanity Nepal (HfH_Nepal) has developed various programs to diffuse ecological housing, still there are many problems due to financial and technological shortage. The purpose of this study is to verify the effects of suggestion of performance improvement for HfH_Nepal eco house with introduction of the housing situation and efforts to provide sustainable housing by HfH_Nepal in Terai plain. Ideas on CGI sheet roof with poor insulation, double panel bamboo wall and adobe brick wall which can overcome structural and waterproof flaws of the thin single panel bamboo wall. The experiment result shows that both ideas adapted to adobe brick house reduces daily temperature range 50.8% and humidity adjust effect. For the effective provision of adobe brick house, compressive strength was tested for the bricks made with locally available fiber materials. Brick with jute displayed 41.1% betterment than plain brick with closest packing condition while coconut and straw showed 25.1% and 7.9% improvement respectively. Technical and economic problems brought up during the building and experiment process were listed and countermeasures established. This kinds of building prototype houses and experiments can improve the living conditions of people in developing countries with little supplement of resources. Furthermore, consideration of locally available and affordable material can help the social and ecological sustainability in the world.