• 한국의류산업학회지
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• 제18권2호
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• pp.244-251
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• 2016

Viscose rayon filament fabrics have been called 'artificial silk' and beloved as summer clothing materials for a long time in Korea. This is because the viscose rayon filament fabrics reveals glossy surface and cool touch feeling compared to other conventional fabrics composed of staple fibers. Therefore, we tried to prepare the higher value added viscose rayon filament fabrics for summer textile products. In this study, we applied gallnut extract to the viscose rayon filament fabric to develop summer fabrics with natural color and multi-functions such as antibacterial and antioxidant properties. This process also pursue eco-friendly and multi-functional fabric finishing from the natural material "gallnut". In addition, various pre-treatment with cationizer, chitosan, or chito-oligomer was applied to the finishing process to improve the finishing efficacy and durability. Consequently, it was found that the active component of gallnut extract was successfully incorporated to the viscose rayon filament fabric through a pad-dry-cure process. And, the treated viscose rayon filament fabrics showed excellent antibacterial and antioxidant properties. Therefore, it was expected that the rayon filament fabrics treated by gallnut extract could be used as effective summer fabrics preventing the growth of bacteria and skin ageing as well as providing cool touch feeling. However, the pre-treatments were not that meaningful on the functionalities but effective on coloring.

• 펄프종이기술
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• 제47권6호
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• pp.22-40
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• 2015

Cellulose fibers is one of the most abundant in nature. It has many distinctive features: abundant in nature, biodegradable, non-toxic, eco-friendly, sustainable, easy to fabricate, hydrophilic, and cost-effective. Cellulose fibers, known as pulp, is produced from cellulose-containing materials by the pulping process. As the raw material, wood has been most commonly used while recycled pulp has been also used to some degree. Thus, pulp usually refers to wood pulp. Generally, the pulp and paper industry is regarded as the commodity market where the cost should be much more important than the quality. It also belongs to a mature market where the growth is slow, or even in decline. Accordingly, technological development has been rather stagnant for the industry. Recently, however, the pulp and paper industry has faced very serious challenges. First, due to digital technology, there has been a steady decline in the need for pulp and paper products. The digital industry has continuously replaced printed products such as books, newspapers, and magazines. Second, there has been a trend initiated by developed countries to limit the use of wood as the raw material for the sake of environmental protection. This forces the industry to find a more efficient use of wood pulp as well as finding alternative, non-wood sources. Third, as an individual becomes wealthier and more conscious of health-care, the quality of a product becomes more important than the cost. Thus, a paradigm shift is needed from the cost-conscientious to the quality conscientious. The objective of this article is to review the technologies aimed at engineering cellulose fibers for producing high-value added paper products.

• 대한한의학방제학회지
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• 제18권2호
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• pp.241-249
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• 2010

The Geranium nepalense has been used traditionally for treatment of various diseases. However, the molecular studies on the effect of Geranium nepalense have not been carried out. In the present study, Quercetin, quercitrin, and afzelin were isolated from the methanol extract of Geranium nepalense were tested for their anti-inflammatory effect. The anti-inflammatory effect of the compounds was studied in lipopolysaccharide(lps)-treated mouse macrophage cells, RAW 264.7. RAW 264.7 cells were pre-incubated with isolated compounds(0, 5, 10, 20, 40, $50\;{\mu}g/ml$) for 4h and treated with $1\;{\mu}g/ml$ lps for 18h, and then the anti-inflammatory effects of compounds were determined. The results are as follows: Quercetin at various concentration inhibited the viability of Raw 264.7 from 7% to 45%, quercitrin from 25% to 80%, and afzelin from 13% to 52%. Isolated compounds showed a significant decrease in iNOS (inducible nitric oxide synthase) and COX-2 (cyclooxygenase-2). These results suggest that these compounds can be used as stable anti-inflammatory materials.

• 한국균학회지
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• 제44권4호
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• pp.318-322
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• 2016

노루궁뎅이(Hericium erinaceus) 수확 후 배지를 추출한 시제품 알토엑스 + 질산칼슘, 케이칼슘과 알토엑스베타는 토마토 풋마름병균에 대하여 강한 항균활성을 나타내었다. 토마토 풋마름병에 대하여 알토엑스 + 질산칼슘, 케이칼슘과 알토엑스베타가 87.4~100%, 46.0~100%, 65.0~91.6%의 방제효과를 각각 나타내었다. 이들 결과들은 알토엑스 + 질산칼슘, 케이칼슘과 알토엑스베타가 토마토 풋마름병 방제를 위한 유망한 친환경 세균제가 될 것으로 생각된다.

• 복식문화연구
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• 제22권2호
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• pp.183-197
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• 2014

The purpose of this study is to compare the purchase intention on naturally dyed clothing between Korea and the US. As independent variables that affect the purchase intention, benefits that consumers seek when purchasing naturally dyed clothing, especially for fabric materials, and attitudes towards naturally dyed clothing were selected. A quantitative research method with a survey was employed. 160 data from Korea and 180 data from the US were used for the analysis. The convenience sampling method (i.e., college female students) was used. Descriptive statistics, factor analysis, t-test and regression analysis were employed to test the differences in purchase intention, fabric benefit sought, and the attitudes. The fabric benefit sought selected for this study includes eco-friendliness, uniqueness, aesthetic, comfort and quality. The attitude toward naturally dyed clothing was categorized as an emotional and a cognitive attitude. The results show the significant differences in the fabric benefit sought depending on nationality, major and experiences in natural dyeing. Significant differences were found in of the attitude toward naturally dyed clothing among the nationalities and the experience types in natural dyeing. In addition, there were significant differences in purchase intention toward naturally dyed clothing between Korean and the US participants, and countries show different fabric benefits and attitudes which influenced participants' purchase intention. The results of this study suggest an appropriate fabric planning for environment-friendly fashion products for both countries.

• 디지털산업정보학회논문지
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• 제15권4호
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• pp.173-187
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• 2019

Based on the theory of planning behavior, the purpose of this study was to validate the path to consumers organic bakery product purchasing process, and moderating effect of price sensitivity. The improvement of national income and changes in diet due to economic growth began to increase consumption of organic and eco-friendly farm products, and thus products using organic materials began to be released in bakeries. Thus, it was necessary to understand consumer awareness and purchasing processes for organic bakery products. Specifically, the study examined the structural relations among purchase reasons, purchase motives, and purchase behavioral intention of organic bakery products. A survey was conducted in May 2019 from adults who had experience purchasing organic bakery products in Seoul metropolitan area, and 327 responses were used for data analysis. The findings of the study showed that consumers' interests in health, food safety, and environment had positive effects on their attitudes, subjective norm, and perceived behavioral control toward organic bakery products, while their interests in organic products did not have an effect on perceived behavioral control. There were significant differences in the purchasing process of organic bakery products according to their price sensitivity. The study suggests that the correct delivery of information on organic ingredients and the price policies available to many consumers will contribute to the revitalization of organic bakery products.

• 한국식품조리과학회지
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• 제29권2호
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• pp.169-175
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• 2013

The purpose of this study was to provide the basic information necessary to efficiently run a coffee shop. It comparatively analyzes the relative importance and satisfaction of side menu selection characteristics through analyses on customer importance-satisfaction when selecting a side menu as well as their usage behavior of the side menu at coffee shops. According to reason price the analysis result on the differences in the coffee shop side menu importance and satisfaction, there was a difference because the importance of selecting a side menu was higher for the attributes of taste, health, packing & appearance, economics and personnel service compared to satisfaction among which the price of a side menu was found to be the top priority for improvement. The significance of coffee shop side menu for the respondents prior to usage as well as their satisfaction after usage was evaluated in order to comparatively analyze the relative importance and achievement of each characteristic through the IPA. The result indicated that the variables positioned in the Concentrate Here area (II) were related to economic feasibility such as reasonable price, appropriate price of set menu, telecommunication company affiliated service and coupon usage and point accumulation. As for the Keep up the Good Work area (I), there were many variables regarding personnel service including taste of side menu, blending with coffee, clean packing, clean packaging, staff's side menu knowledge, staff's quick response, staff's politeness and staff's sincere response. As for the variables in the Low Priority area (III), health variables on health such as nutritional value, eco-friendly food materials and calories were observed.

• 한국화재소방학회논문지
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• 제32권1호
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• pp.40-45
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• 2018

무기재로서 질석은 친환경적인 특성과 내화, 단열, 흡음 뿐 만 아니라 결로방지, 탈취 및 미관 등이 우수하므로 건축마감재로서 활용될 경우 효용성이 높을 것으로 판단된다. 본 연구에서는 질석을 주원료로 하여 미네랄 루즈울(Mineral Loose Wool) 또는 미네랄 파우더(Mineral Powder)를 혼입한 건축용 마감보드를 개발하고 불연시험과 단열시험을 수행하였다. 시험결과 두 개의 질석보드 모두 불연재로서 성능을 확보하였으며 열전도율 0.086 및 $0.092W/m{\cdot}K$로 나타났다. 또한 개발된 두 개의 질석보드를 경골목구조 내화벽체 표준상세(KS F 1611-1)의 마감재로 적용하여 내화시험을 수행하였다. 내화시험결과 VB-L 시험체가 VB-P시험체 보다 내화성능이 다소 높게 나타났으며 두 개의 질석보드 모두 두께 30 mm로도 내화성능 2시간 확보가 충분한 것으로 나타났다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제44회 동계 정기학술대회 초록집
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• pp.631-631
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• 2013

Battery has major drawbacks including its size and life expectancy, and environmental problem. As an alternative, energy harvesting is emerging as a potential solution to replace battery along with more energy-efficient IT devices. The idea of harnessing energy from our living environment is sustainable, semi-permanent, and eco-friendly. Also, unlike battery, energy harvester does not require much space to store energy. Therefore, energy harvesting can provide a better source of power for small, portable, and wireless devices. Among various ways of harvesting energy from our surroundings, triboelectricity is chosen due to its potential to be miniaturized, and efficient. Triboelectric effect occurs as two different materials with different polarity of charge separation come into contact through friction, and then become separated so that electric potential difference is achieved. In this research, such characteristic of triboelectricity is used as a way to convert ambient mechanical energy into electric energy.Series of recent researches have shown promising results that the triboelectric energy harvester can be simple and cost effective. However, sufficient electricity level required to operate mobile devices has not yet been achieved.In this research, our group focuses on the design and optimization of triboelectric energy harvesting device to enhance its output. By using maskless lithography to pattern Kapton film and silicon substrate, which is used as a mold for PDMS thin layer, and sputtering metal electrodes on each side, we fabricate and demonstrate different designs of triboelectric energy harvester that utilizes the contact electrification between a polymer thin film and a metal thin foil. In order to achieve optimized result, the output voltage and current are measured under diverse conditions, which include different surface structure and pattern, material, and the gap between layers.

• 한국콘텐츠학회논문지
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• 제15권2호
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• pp.177-186
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• 2015

본 논문은 21세기에 접어들어 다품종 소량생산으로 변화하고 있는 추세에 맞추어 가구디자인 분야가 이바지 할 수 있는 방향성을 3D프린팅을 이용한 가구디자인 제작 사례를 분석함으로써 제시하는 것에 목적을 두고 있다. 본 논문은 3D 프린팅으로 제작된 가구 및 조명의 사례를 3가지 분류로 분석하였다. 첫째 3D프린팅 방식과 재료의 연관성에 따른 분류, 둘째 3D프린팅 가구디자인의 8가지 조형적 특징에 따른 분류, 셋째 실용성, 사용성, 내구성에 따른 기존 가구디자인과 3D 프린팅 가구 디자인의 경쟁력 비교분석이다. 본 연구를 통해 얻어진 가구디자인 분야에서 3D 프린팅 기술이 가져다주는 경쟁력은 다음과 같다. 첫째, 개인 취향에 맞춘 다품종 소량생산이 가능하다. 둘째, 디지털을 통한 가구의 전송, 운송이 편리해 졌다. 셋째, 가구디자인 생산에 변혁을 가져다준다. 넷째, 3D 프린팅과 사물인터넷의 융합을 통해 스마트가구디자인 분야로의 발전 가능성이 있다. 다섯째, 지속가능한 친환경 가구디자인이 용이해진다.