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수열합성법에 의한 Zinc Selenide 나노 분말 합성 및 미세구조 특성 연구
김미소,홍현선,Kim, Mi-So,Hong, Hyun-Seon 한국재료학회 2017 한국재료학회지 Vol.27 No.9
Nano-sized Zinc selenide (ZnSe) powder was successfully synthesized using Zn and Se precursors in a hydrothermal process. Temperature for the synthesis was varied from $95^{\circ}C$ to $180^{\circ}C$ to evaluate its influence on the microstructural properties of the synthetic particles. ZnSe powder thus fabricated was characterized using various analytical tools such as SEM, XRD, TEM and UV-Vis methods. Two types of ZnSe particles, that is, the precipitated particle and the colloidal particles, were identified in the analysis. The precipitated particles were around 100 nm in average size, whereas the average size of the colloidal particles was around 20 nm. The precipitated particles made at $150^{\circ}C$ and $180^{\circ}C$ were found to be a single phase of ZnSe; however, an inhomogeneous phase was obtained at the lower synthesis temperature of $95^{\circ}C$, suggesting that the temperature for the synthesis should be over $100^{\circ}C$. The precipitated particles were inactive in the UV-Vis absorption investigation, whereas the colloidal particles showed that absorptions occurred at 380 nm in the UV-Vis spectrum.
폐 리튬 이차전지로부터 회수된 황산코발트 제조 및 이를 이용해 합성된 산화리튬코발트 양극활물질의 전기화학적 특성
김미소,하종근,박세빈,안주현,최임식,조권구,Kim, Mi-So,Ha, Jong-Keun,Park, Se-Bin,Ahn, Jou-Hyeon,Choi, Im-Sic,Cho, Kwon-Koo 한국전기화학회 2014 한국전기화학회지 Vol.17 No.2
본 연구에서는 폐 리튬이차전지의 스크랩으로부터 순도 높은 황산코발트($CoSO_4$) 용액을 회수하고, 회수된 용액을 이용하여 리튬이차전지의 양극활물질인 $LiCoO_2$를 제조하여 전기화학적 특성을 평가하였다. 황산코발트의 제조는 황산과 과산화수소수를 이용하여 원료물질로부터 금속물질을 녹여내기 위한 침출단계, 가성소다를 이용한 pH 조절로 1차 불순물을 제거하기 위한 중화공정 및 D2EHPA와 $CYANEX^{(R)}272$를 이용하여 2차 불순물을 제거하기 위한 용매추출공정을 거쳐 고순도의 용액을 회수한다. 회수된 황산코발트는 증류수와 희석하여 6 wt.% 황산코발트 용액으로 만들고, 다시 옥살산과 혼합 및 교반 후 건조, 하소 및 리튬의 원료가 되는 $Li_2CO_3$ 분말과 혼합 후 합성 공정을 거쳐 이차전지의 양극활물질인 $LiCoO_2$를 제조하였다. 이를 이용하여 전극을 조립하고, 전기화학적 특성을 평가하였다. 전기화학적 특성은 본 실험에서 합성된 $LiCoO_2$와 상업용 $LiCoO_2$(Aldrich사)를 비교하였으며, 결과는 유사하거나 혹은 합성된 $LiCoO_2$가 더 우수한 것을 확인할 수 있었다. 따라서, 본 실험을 통해 양극활물질의 재활용 가능성을 확인하였다. The electrochemical properties using the cells assembled with the synthesized $LiCoO_2$(LCO) were evaluated in this study. The LCO was synthesized from high-purity cobalt sulfate($CoSO_4$) which is recovered from the cathode scrap in the wastes lithium ion secondary battery(LIB). The leaching process for dissolving the metallic elements from the LCO scrap was controlled by the quantities of the sulfuric acid and hydrogen peroxide. The metal precipitation to remove the impurities was controlled by the pH value using the caustic soda. And also, D2EHPA and $CYANEX^{(R)}272$ were used in the solvent extraction process in order to remove the impurities again. The high-purity $CoSO_4$ solution was recovered by the processes mentioned above. We made the 6 wt.% $CoSO_4$ solution mixed with distilled water. And the 6 wt.% $CoSO_4$ solution was mixed with oxalic acid by the stirring method and dried in oven. $LiCoO_2$ as a cathode material for LIB was formed by the calcination after the drying and synthesis with the $Li_2CO_3$ powder. We assembled the cells using the $LiCoO_2$ powders and evaluated the electrochemical properties. And then, we confirmed possibility of the recyclability about the cathode materials for LIBs.
김미소ㆍ정숙영(Mi so KimㆍSook young Jeong) 한국인체미용예술학회 2016 한국인체미용예술학회지 Vol.17 No.1
In the modern era, buying an imitation product or having luxury brand logos on nails has substituted for the purchase of the luxury items themselves. The purpose of this study is to find a substitute for the pattern of over-consumption in which people buy expensive items to make themselves look better. For this, a literature review was performed regarding the creation of nail art design. The luxury brand ‘LOUIS VUITTON’ was selected, and the monogram from this brand was used as a motif in nail art. After dividing the nail design into two groups (a group of the nail art design preferred by people in their 20-30s, a group of the designs preferred by people aged 40-50s), treatment methods were diagramed, and a scope of research was set. The study results found that using luxury brand logos in nail art temporarily satisfies modern women’s desire for buying a luxury brand item and creates general image coordination.
산림자원에서 추출한 유지자원의 영양성분 및 이화학적 특성 검토
김미소(Mi-So Kim),박준형(Joon Hyung Park),임호정(Ho-Jeong Lim),김다솜(Da-Som Kim),김회성(Hoe-Sung Kim),이경태(Kyoung-Tae Lee),박용배(Yong Bae Park),신의철(Eui-Cheol Shin) 한국식품영양과학회 2017 한국식품영양과학회지 Vol.46 No.4
본 연구에서는 산림자원에서 추출한 유지자원의 이용에 대한 잠재력을 확인하고자 지용성 영양성분에 대한 연구와 이를 토대로 한 이화학적 특성을 확인해 보았다. 영양성분의 경우 높은 불포화 지방의 비율(>80%)을 보였고, 지용성 비타민인 tocopherols과 식물성 스테롤인 phytosterol의 다양한 함량 분포를 확인하였다. 이화학적인 특성을 볼 때 1차 산화생성물인 산가와 과산화물가의 값은 안정적인 값이었으며, 2차 산화생성물의 지표인 p-anisidine value의 값을 확인하였다. 갈변도와 색도의 경우 유지 자체의 색도를 포함한 값으로 인해 신선도를 판정하기에는 무리가 있으나 색도에 대한 정보를 통해 적용 분야를 적용할 수 있는 근거로써 이용이 가능할 것으로 보인다. 산화안정성의 지표인 산소유도기간에서도 불포화지방산과 지용성 항산화제인 α-T의 함량에 따른 다양한 결과를 보였다. 본 연구는 영양성분 및 이화학적인 결과를 산림유지 자원의 이용을 위한 기초자료로서 활용이 가능다고 판단된다. Nutritional constituents and physicochemical properties of lipids of forest resources were studied in order to examine their practical utilization in the lipid industry. In this study, Garae, Dongback, Mougwi, and Muwhanja were chosen as sources of fat-soluble components. Fatty acid profiles of forest resources showed more than 80% polyunsaturated fatty acids in total fatty acids. For total tocopherol contents, Garae showed higher content than others; moreover, Dongback was a good source of α-tocopherol. Phytosterols of forest resources ranged from 55.96±2.23 to 194.94±21.42 mg/100 g, and Muwhanja showed the highest phytosterol contents. Chemical properties such as acid value, peroxide value, and p-anisidine value showed good oxidative stability of lipids of forest resources. For physical properties, browning intensity and color parameters were studied. Induction times, as an indicator of oxidative stability, were measured and ranged from 0.70±0.01 to 18.40±1.02 h in four forest resources. Taken together, contents of lipid constituents and physicochemical properties can be used as an important preliminary database for utilization of lipids of forest resources.
김문선 ( Moonsun Kim ),김민 ( Min Kim ),김미소 ( Miso Kim ),이일화 ( Ilhwa Lee ),김은수 ( Eun-soo Kim ) 사단법인 대한문신사중앙회 2020 한국문신연구학회지 Vol.1 No.1
This study will serve as an opportunity to fill the gap between "bad preconceptions by the past image of tattoo and the recognition flow as the tattoo culture of the present era becomes popular." It will be understood as a small form of social integration. With the popularization of tattoos, more and more people have used tattoos as their jobs, but controversy over medical practices, art acts and freedom of choice remains. At this point, it is necessary to find out the impact of the image of tattooing by the general public on the perception of tattoo jobs. For this study, the survey was conducted on teens to 50s from October 3, 2020 to November 12, 2020, and the results of the study were summarized using only the effective samples as the final data for the empirical analysis. The public's awareness of tattooing in each field was high, and the higher the interest in tattooing and the higher the awareness of image, the higher the professionalism of tattooing jobs and the higher the expectation for the future. As a result, despite the negative image of the past and the reality that it is considered illegal medical practice, the current tattoo was not only positive, but also the job of tattooist was highly recognized by the general public for its expertise, future expectations, and job development potential. Based on this study, we hope that research and materials that can be based on subsequent research on tattoo will be activated, which will be the basis for positive development as a new occupation group.