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생붕괴성 플라스틱 포장재의 제조 및 제조된 소재의 안전성과 분해성 연구
유영선 ( Young Sun You ),한정구 ( Jung Gu Han ),이한나 ( Han Na Lee ),박수일 ( Su Il Park ),민세철 ( Sea Cheol Min ) 한국산업식품공학회 2011 산업 식품공학 Vol.15 No.3
Biodegradable plastics were developed using biodegradable pellets made of corn stalk and rice husk and their safety as food packages and their biodegradability against light (ultraviolet (UV)), heat, and fungi were evaluated. Four kinds of 50-?m biodegradable plastics were produced by extruding the mixtures of the biodegradable pellets, lowdensity polyethylene (LDPE), high-density polyethylene (HDPE), and linear low-density polyethylene (LLDPE) with different compositions. Developed biodegradable plastics were safe to be used as food packages. The initial tensile strength and percentage elongation of the plastics were similar to those of LDPE, but the values decreased with increased their exposure time to UV and heat. The fungal biodegradability of the biodegradable plastics was higher than that of LDPE. The biodegradability of the biodegradable plastics showed potential for them to be used as sustainable food packages.
유영선(Young-Sun You),소규호(Kyu-Ho So),정명수(Myong-Soo Chung) 한국식품과학회 2008 한국식품과학회지 Vol.40 No.4
환경문제가 대두되면서 이미 선진국의 포장재 공급업체들은 소비자의 관심과 재활용 규제가 친환경 포장재 수요를 불러일으킬 것으로 전망하였다. 이러한 수요에 대응하기 위해 옥수수와 같은 식물을 활용해 만든 여러 형태의 바이오 플라스틱을 출시해 왔으며, 국내 업체들에서도 점차 이에 대한 관심을 높여가고 있다. 점차 강화되고 있는 폐기물 부담금과 불안정한 국제 유가를 고려할 때, 바이오 플라스틱은 소비자들의 친환경 제품에 대한 관심과 연결되어 국내 플라스틱 산업의 새로운 활로가 될 것으로 기대된다. 이를 위해서는 비교적 초기단계에 있는 국내 친환경 플라스틱 기술에 대해 기업과 대학에서 활발한 연구가 이루어져야 할 것으로 보인다. 빠르면 2-3년 내에 생분해성 플라스틱을 주원료로 한 도시락 용기, 컵라면 용기 및 각종 상품용 포장용기가 실용화되고, 장기적으로는 폐수내의 중금속 이온 제거제를 비롯하여 생체 의료용제 등과 같은 첨단의 고부가 생명 공학기술을 응용한 다양한 종류의 환경 친화 제품의 출시가 예상되며, 향후 생분해성 플라스틱 산업은 시장 잠재력과 성장성이 무한한 환경 관련 사업으로 평가된다. Plastics are comparatively new polymeric materials that are manufactured by chemical synthesis, making them different from natural materials such as wood, paper, stone, metal, and glass. Due to a wide range of properties, including processing capabilities and duration, plastics have become rapidly ubiquitous, being used in all industries, and have improved our quality of life. However, it is true that plastics cause environmental contamination problems that have become important social issues, such as environmental hormone leakage due to incineration or reclamation, difficulty in securing reclamation sites, and deadly poisonous dioxin generated by the incomplete incineration of waste plastic materials. To solve these problems, it is urgent to develop and commercialize degradable plastics that can be stably and conveniently used just as general plastics, and that are easily decomposed by sunlight, soil microbes, and heat generated from reclaimed land after use. This review presents recent worldwide trends in the development and marketing of environmentally degradable plastics.
성유정(You Jung Sung),유영선(Young Sun Yoo) 한국복식학회 2002 服飾 Vol.52 No.7
The purpose of this study is to develope a creative expression technique in fashion illustration through analyzing applied techniques of the elements related to creative expressions in fashion illustrations. They were investigated in view of line .form, texture, color, space and the results were summarized as follows. In the creative expression using line in the fashion illustration, emotional effects of line created by specific character of mediums and duplicated lines have been applied to visualize movements of the objects. In shape, the transformed figure by destructing, covering or eliminating a part of the figure or the dress has been adapted. In texture, the invented texture reconstructed from actual texture has been applied, collage technique, computer graphic being used to give various images of texture. The creative expressions using color have been achieved by the shading, and spreading effects and the symbolic meaning of color for creating a spatiality in a picture plane and to give emotional effects and visual concentricity. In space, the color perspective together with detailed description, the combination of various points of view and liner perspective have been used to create depth and illusional space in pictorial plane.
윤형선(Hyung-Sun Yoon),이미현(Mihyun Lee),김현연(Xuanyan Jin),김수진,이소윤(Soyeon Lee),김연비,유영선(Young-Sun You),이진규(Jin-Kyu Rhee) 한국식품과학회 2016 식품과학과 산업 Vol.49 No.4
The potentialities of 3D printing technology are discussed from technical and research-oriented perspectives for industrial manufacturing of a variety of food products. Currently, 3D printing technology has advanced to enable us to process or cook innovative foods. However, food-based materials for 3D printing are still limited in terms of eating qualities, nutritional values and functionality as well as industrial production. Therefore, this uprising issue on alternative food processing techniques especially focused on the exploration of new food materials combined with these 3D printing technologies needs to be re-spotlighted, and then solved to pave the way to this innovative and sensational area of investigation with more accessibility. In this review, previous research work and industrial applications conducted by frontier research groups in this field are covered, then to open discussion for future research on the 3D printing of food.
장시훈 ( Si-hoon Jang ),유영선 ( Young-sun You ),박수일 ( Su-il Park ) 한국환경기술학회 2011 한국환경기술학회지 Vol.12 No.3
저밀도폴리에틸렌(LDPE)에 분해성 마스터 뱃치(M/B)와 전분, 대두유 혹은 구연산을 첨가하여 분해성 및 물성 변화를 관찰하였다. 분해성 M/B는 무기물 충전제인 탄산칼슘을 비롯하여 왁스, 전분 및 산화촉진제 등을 첨가하여 제조하였으며 LPDE을 기본 레진으로 하여 필름 형태로 압출 성형하였다. 기계적 물성으로 인장강도 및 신장율을 측정하였으며, 산소투과도 및 각 필름 샘플의 자외선 조사의 가속 조건에서 분해성을 분석하였다. 인장강도는 전분함량이 높은 필름을 제외하고는 시료들 간의 차이를 보이지 않았으며 신장율은 모든 시료에서 차이를 보이지 않아 분해성 M/B가 LDPE 필름의 물성에 큰 영향을 주지 않았다. 또한 분해성 M/B의 함량이 증가할수록 자외선 조사에 의한 기계적 물성 붕괴가 빠르게 진행되어 분해성 M/B의 사용이 분해도 증가에 우수한 효과를 가짐을 알 수 있었다. 자외선 조사에 의한 필름류의 산소투과도의 변화를 측정하여 필름류의 분해정도를 투과도 변화를 통해 예측해보고자 시도하였으나 물성 감소가 투과도 변화보다 빨리 발생하여 투과도가 분해성 평가 지표로서 적합하지 않았다. The effects of the additions of degradable master batch(M/B), starch, soybean oil, or citric acid on the properties of low density polyethylene(LDPE) films was studied. Degradable M/B were prepared by extrusion methods and mixed with LDPE to form blown films. Mechanical properties such as tensile strength and percent elongation at break, oxygen permeability and degradability under UV radiation were evaluated. The addition of degradable M/B and other additives did not alter the mechanical properties of films except high starch containing films. The degradability of LDPE films under UV radiation increased with increasing degradable M/B contents. We tried to use oxygen permeability values as degradability index under UV radiation but the reduction of mechanical properties of films occurred faster than changes of permeability of films.