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Young Jin Kim,Yong Man Lee,Hyang Mok Lee,O Ok Park 한국화학공학회 1994 NICE Vol.12 No.5
N/A An investigation of the biodegradable polymers based on starch has been accomplished. Starch needs to be modified before blending with low density polyethylene(LDPE) because of its hydrophilicity. Three kinds of modification methods were applied to obtain the compatibility to starch-LDPE blends. The first one was the esterification of the hydroxyl group of starch with acetic anhydride. The second was the copolymerization of actylonitrile and styrene onto starch. The last was the esterification reaction of the hydroxyl group of starch with three kinds of ionomers. The tensile strength, % elongation, Young`s modulus, and shear viscosities of blends of the modified starch and LDPE were examined. Ionomer-treated starch showed better compatibility with LDPE to give better performances than other blends.
Processabilities & Mechanical Properties of the Biodegradable LDPE / Modified Starch Blends
Young Jin Kim,Yong Man Lee,Hyang Mok Lee,O Ok Park 한국화학공학회 1994 화학공업과 기술 Vol.12 No.5
N/A An investigation of the biodegradable polymers based on starch has been accomplished. Starch needs to be modified before blending with low density polyethylene(LDPE) because of its hydrophilicity. Three kinds of modification methods were applied to obtain the compatibility to starch-LDPE blends. The first one was the esterification of the hydroxyl group of starch with acetic anhydride. The second was the copolymerization of actylonitrile and styrene onto starch. The last was the esterification reaction of the hydroxyl group of starch with three kinds of ionomers. The tensile strength, % elongation, Young`s modulus, and shear viscosities of blends of the modified starch and LDPE were examined. Ionomer-treated starch showed better compatibility with LDPE to give better performances than other blends.
PROCESSABILITIES & MECHANICAL PROPERTIES OF THE BIODEGRADABLE LDPE/MODIFIED STARCH BLENDS
Kim, Young Jin,Lee, Yong Man,Lee, Hyang Mok,Park, O Ok 한국화학공학회 1994 Korean Journal of Chemical Engineering Vol.11 No.3
An investigation of the biodegradable polymers based on starch has been accomplished. Starch needs to be modified before blending with low density polyethylene (LDPE) because of its hydrophilicity. Three kinds of modification methods were applied to obtain the compatibility to starch-LDPE blends. The first one was the esterification of the hydroxyl group of starch with acetic anhydride. The second was the copolymerization of acrylonitrile and styrene onto starch. The last was the esterification reaction of the hydroxyl group of starch with three kinds of ionomers. The tensile strength, % elongation, Young's modulus, and shear viscosities of blends of the modified starch and LDPE were examined. Ionomer-treated starch showed better compatibility with LDPE to give better performances than other blends.
기체 전기방전을 이용한 리액티브 블루 4의 분해에 관한 연구
목영선,조진오,이호원 제주대학교 공과대학 첨단기술연구소 2006 尖端技術硏究所論文集 Vol.17 No.1
Gaseous electrical discharge is an effective method available for the production of ozone and ultraviolet light. The wastewater treatment system of this study was designed to utilize both ozone and ultraviolet light produced by the electrical discharge for the degradation- of organic contaminants. The electrical discharge device (DBD reactor) consisted of a quartz cylinder, a coaxial ceramic tube inside of which a steel rod was placed (discharging electrode), and a steel wire that was helically wound around the quartz cylinder (ground electrode). The DBD reactor was immersed in the wastewater in order that the ultraviolet light could irradiate the wastewater. The ozone-containing gas from the DBD reactor was sparged throughout the wastewater. An anthraquinone-based dye, Reactive Blue 4, was chosen as the organic contaminant. The experimental results showed that the present system was very effective for the degradation of the organic contaminant. The energy requirement for the degradation was found to be 0.42kJ/mg, on the basis of 90% chromaticity removal.
국부 마모 부품을 위한 레이저 표면강화 열처리에 관한 연구
이목영,김형준,김기철,김재웅 한국레이저가공학회 2002 학술발표대회 Vol.2002 No.1
두께 10mn 일반기계구조용강재를 사용하여 레이저 종류에 따른 표면경화 열처리특성에 관하여 알아보았다. 경화층의 형성은 레이저의 종류에 크게 영향을 받았는데, 표면경화 열처리를 위해서는 파장이 짧은 Nd-YAG 레이저를 사용하는 것이 유리하였다. 경화층의 최고경도는 700Hv 가량으로 높게 나타났으며, 레이저 표면경화 열처리는 상온에서 사용되는 부품의 내마모성 향상 특히 국부 마모를 겪는 부품에 효과적일 것으로 판단되었다.
목연수,장성록,이영섭,고성석 한국산업안전학회 2002 한국안전학회지 Vol.17 No.2
Current fire safety in the construction sites has developed piecemeal over a considerable period of time. However, the law and regulation of fire safety is insufficient to protect fire in the construction sites. The frequency of fire in the construction sites is very rare but it brings longterm deterioration durability of building structure and large scale industrial calamity. There are many process of works and each work deals with many kind of flammable material, so it is very difficult find a proper safety fire prevention. This study executed the questionnaire and fire experiment of the welding work to provide effective fire prevention counterplan.
실내공기정화기에서 먼지 및 유기물화합물의 동시 제거에 관한 연구
목영선,강호철,이호원,현영진 제주대학교 공과대학 첨단기술연구소 2002 尖端技術硏究所論文集 Vol.13 No.1
The indoor air cleaner used in this study consisted of a plasma reactor followed by an electrostatic precipitator. The role of the electrostatic precipitator is to collect particulate matters, and the plasma reactor plays an important role in decomposing organic compounds and precharging particulate matters in order that they may easily be collected in the following electrostatic precipitator. For the performance test of the air cleaner, toluene, trichloroethylene (TCE), n-butanol and methanol were added to the indoor air. According to the experimental data, the collection efficiency of particulate matters was found to be largely enhanced when the plasma reactor was operated. This enhancement of collection efficiency is believed to result from precharging particulate matters. A large amount of electrical energy was required for the decomposition of the organic compounds, which indicates that the indoor air should be repeatedly circulated for proper treatment.