• 한국재료학회지
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• 제31권9호
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• pp.525-531
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• 2021

Carbon-encapsulated Ni catalysts are synthesized by an electrical explosion of wires (EEW) method and applied for CO₂ methanation. We find that the presence of carbon shell on Ni nanoparticles as catalyst can positively affect CO₂ methanation reaction. Ni@5C that is produced under 5 % CH₄ partial pressure in Ar gas has highest conversions of 68 % at 350 ℃ and 70 % at 400 ℃, which are 73 and 75 % of the thermodynamic equilibrium conversion, respectively. The catalyst of Ni@10C with thicker carbon layer shows much reduced activity. The EEW-produced Ni catalysts with low specific surface area outperform Ni catalysts with high surface area synthesized by solution-based precipitation methods. Our finding in this study shows the possibility of utilizing carbon-encapsulated metal catalysts for heterogeneous catalysis reaction including CO₂ methanation. Furthermore, EEW, which is a highly promising method for massive production of metal nanoparticles, can be applied for various catalysis system, requiring scaled-up synthesis of catalysts.

• 패션비즈니스
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• 제23권4호
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• pp.127-139
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• 2019

Up-cycling has evolved from its original form of the simple recycling of waste, into an industry of its own that has been gaining momentum. In many developed industries, up-cycling is increasingly seen as an 'environmentally-friendly way of production and ethical way of consumption'. However, an examination of the designs of branded up-cycled products suggests that there is a need for product development fueled by further research on materials. The purpose of this study is to introduce various production methods that can overcome the shortcomings of using waste material and Korean motifs for use in product development, which ultimately contribute to enhancing the potential variety and character of up-cycled products. In order to do so, the up-cycling industry was examined to define key concepts, domestic and overseas markets were surveyed, and case analyses were conducted on domestic and foreign up-cycling brands. In addition, after tracking how leather is discarded and accumulated as waste and then collecting the discarded leather, the properties of the material were analyzed. A study of Korean motifs was followed by the concept summary, and upcycling design expressions that exemplify Korean images were identified. The following two novel methods were used to create six up-cycled bags using collected discarded leather. First, lucky bags and moon pots were selected from various Korean motifs in order to use motifs with identifiable features. Secondly, different variations of cutting and attachment methods were used, including iron mold production methods and presses.

• Ocean and Polar Research
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• 제43권3호
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• pp.149-164
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• 2021

Since the existing mass production and consumption systems are no longer sustainable, countries are pushing for policies to make fisheries by-products as resources in an eco-friendly manner, and international standards are also being strengthened to increase the value of by-products. In Korea, economic and environmental perceptions of the by-products are rapidly changing, such as realizing carbon neutrality and enhancing circular resources by Korean Sustainable Development Goals. Raw materials derived from the by-products have been steadily imported from 2018. In particular, the number of imports of fish collagen peptides was only 16 number of times in 2017, but was rapidly increased to 483 number of times in 2020. Simultaneously, the demand for raw materials and nutrients for health functional food derived from fish by-products, which did not exist statistically until 2017, started to arise from 2018, and in 2019, consumption of high-value-added raw materials for fish by-products increased by 45% compared to the previous year. However, limitations are in legal and biotechnical industry aspects while its value as a biomaterial is recognized in the by-products-related industry. In this study, therefore, the status of by-products for upcycling biomaterials was reported and provided a scientific basis for supporting governmental strategies. In order to fulfill with the principles of a sustainable circular economy, the factors on hinder the marine bio-industrialization of the by-products were derived and suggested directions and plans for development into a high-value added the by-products as the marine bio-industry by substituting imported raw materials to support the development.

• 한국의류산업학회지
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• 제25권5호
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• pp.568-577
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• 2023

This study examined how middle-aged female consumers' environmental consciousness influences their attitudes and ethical purchasing behavior toward RUR (recycling, upcycling, and reuse) knit products. The research employs a survey method, targeting 30-40 year old women residing in Seoul and Gyeonggi-do Province. On-line and off-line data collection were conducted. The following conclusions emerged through statistical analyses, including factor analysis, cluster analysis, t-test, and regression analysis. Firstly, respondents' environmental consciousness variables were classified into two factors, delineating high and low environmental consciousness clusters, demonstrating significant differences between them. Secondly, the high environmental consciousness cluster exhibited more positive consumer attitudes and ethical purchasing behavior towards RUR knit products. Moreover, it was established that environmental pollution consciousness and eco-friendly product purchase consciousness influenced environmental consciousness on consumer attitudes and ethical purchasing behavior. Lastly, the study confirmed that consumer attitudes mediated environmental consciousness and ethical purchasing behavior. In conclusion, this research establishes a meaningful link between environmental consciousness, consumer attitudes, and ethical purchasing behavior in 30-40 year old women. Environmentally conscious groups positively influence attitudes toward RUR knitted fashion and promote ethical purchasing behavior. Consequently, it is recommended that knit fashion companies prioritize environmental consciousness and eco-friendly products in their marketing strategies. Furthermore, diversifying the application of RUR knit products, coupled with eco-friendly production techniques, can amplify their appeal and utility, ensuring a positive impact on consumer behavior.

• 한국해양바이오학회지
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• 제15권2호
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• pp.67-81
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• 2023

This study examines a business survey on the utilization of fishery by-products with the aim to assess the feasibility of incorporating these by-products into various industries. The research involved surveying 312 biocompanies across the country and conducting an empirical analysis based on the collected data. South Korea, a leading seafood-producing country with a developed seafood processing industry, provides conditions necessary to utilize seafood by-products as raw materials for the marine bioindustry. Among the surveyed biocompanies, 38.5% expressed their intention to engage in industrial activities involving the use of fishery by-products in the future, indicating a significant level of interest within the bioindustry in utilizing marine and fishery by-products. Companies showed interest in diverse materials, such as scales, fish bones, skin, and kelp holdfast beyond those currently defined under the Fisheries By-products Recycling Promotion Act (officially unnamed, 2021). This suggests a need for improvements in the regulatory framework to accommodate these diverse biomaterials. Furthermore, we propose enhancing the efficiency of fishery by-product utilization by focusing on regional specialization in marine bioindustry. This involves utilizing existing legal framework for upcycling fishery by-products and fostering a regionally specialized marine bioindustry.

• 한국의류산업학회지
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• 제17권5호
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• pp.681-690
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• 2015

Sustainability has been a important issue in fashion industry that reflects the modern phase of the time. More education institutions than ever before are beginning to offer specialized courses, certificates and degrees related to sustainability in fashion, and many fashion institutions are working to embed sustainability issues into the educational contents. In this study, I investigate how sustainability is being integrated into the curriculum of leading fashion institutions, corporate management activity across the world and overview the world leading educational programmes related to sustainable fashion, pulling out the unique expertise and areas of specialization for each institution. In conclusion, the sustainable fashion were still not widely promoted domestical fashion institutions compare with other foreign leading fashion institutions. This happens in fashion business as well. Korean fashion institutions have to make educational program and certificates and degrees related to sustainability because the educational program can transform domestic fashion industry to sustainable fashion leading country level.

• 한국기술혁신학회:학술대회논문집
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• 한국기술혁신학회 2017년도 추계학술대회 논문집
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• pp.369-386
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• 2017

현재 3D프린터의 원료는 대부분 필라멘트를 사용하고 있는데 가격이 고가인 점과 제작 시간의 문제점으로 3D프린팅 하는데 많은 제약이 따르고 있다. 또한, 원료를 재생 및 재활용하는 3D프린터는 현재까지는 없다. 특히 대형 출력물은 많은 원료가 투입되어야 하기 때문에 제조단가가 상승하고, 그에 따른 3D프린터의 보급과 서비스 확장에도 한계가 있다. 본 연구에서는 현재 재활용되고 있는 플라스틱 소재를 재활용할 수 있는 3D프린터 시스템의 기술개발과 응용서비스를 분석하였다.

• 복식
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• 제64권8호
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• pp.138-154
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• 2014

The purpose of this study was to propose up-cycling fashion designs, based on guidelines derived from up-cycling fashion brand products and their required elements of the design. The study thus categorized required elements into environment, significance, economy, function, design, and material, then extracted a set of design guidelines. The guidelines for waste resource-based up-cycling fashion design include the followings: First, authenticity, taking mutual environmental relations into account. Second, rarity of products beyond the domain of standardized ready-made goods thanks to manual operation. Third, storytelling, reflecting the consumer history. Fourth, sustainability to signify the circulation of matters. Fifth, experimental characteristic to fulfill creative innovation. Sixth, changeability through interactions with wearers. The investigator decided design concepts based on them and created up-cycling design works with waste plastic bags, shirts, stockings, neckties, outdoor mats, and backpacks in a variety of formative expressive techniques.

• 공업화학전망
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• 제24권2호
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• pp.1-9
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• 2021

플라스틱은 가볍고 물성이 뛰어나며 가공이 용이하면서도 낮은 가격 때문에 우리의 실생활에서 매일 사용되고 있다. 동시에 썩지 않는 특성 탓에 폐플라스틱에 의한 환경오염의 문제가 심해짐에 따라 전 세계적으로 일회용 포장재 및 용기에 사용되는 플라스틱의 사용을 금지하는 규제 및 폐플라스틱을 재활용하려는 시도가 늘어나고 있다. 하지만 인류가 지난 수십 년간 생산한 플라스틱은 약 83억 톤이지만 이중 약 10%정도만 재활용 되었을 정도로 폐플라스틱의 재활용 비율은 미비하다. 특히, 최근 코로나 팬데믹으로 인해 택배 및 배달음식 주문량이 늘어남에 따라 플라스틱의 사용량이 급증하여 폐플라스틱의 재활용 필요성은 더욱더 커지고 있다. 본 기고문에서는 불균일 촉매를 이용한 수소첨가 폐플라스틱의 분해에 관한 최신 연구동향을 다루고자 한다. 안정적이고 반응성 및 선택성이 뛰어난 촉매 개발은 폐플라스틱의 효과적인 분해를 위해서 매우 중요하다.

• 공학교육연구
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• 제26권3호
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• pp.72-80
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• 2023

Recently, in terms of the future education, the need of the software education according to the 4th industrial revolution and the need of the ESG(environmental, social and governance) education according to social requests for sustainability are increasing at the same time. There may be a number of ways to satisfy the needs at the same time. In this paper, as an effort for meaningful implementation of the future education, a case study on the ESG engineering education based on the software education for community youth was analyzed and a future development direction was suggested. This ESG engineering education deals with the development and application of the program considering terms of target, method and implementation in order to enhance its systematicity and using physical computing and upcycling methods and a collaborative education support system. To verify the education program, a survey is performed and analyzed. Through this, the basis of an software education-based ESG engineering education model was established.