유리고분자의 용매전달특성 및 그 해석

Dukjoon Kim 한국막학회 1998 멤브레인 Vol.8 No.1

The study on penetrant transport in glassy polymers has been actively pursued for decades because of its growing significance in polymer processing and related applications such as not only membranes, but corrosion protective coatings, microlithography, microelectronic fabrication, etc. In membranes application of polymeric materials, successful utilization requires understanding of how solvents penetrate, swell, and sometimes dissolve polymeric materials under various environmental conditions, as their permselecdve performance is significantly affected by it. The expose of polymer membranes to solvents may result in the structural failure due to mechanical softening, embrittlement or crazing.

Arylene Based Ion Conductive Polymer Electrolyte Membranes for Li Secondary Batteries and Fuel Cells

Dukjoon Kim(김덕준) 한국고분자학회 2020 한국고분자학회 학술대회 연구논문 초록집 Vol.45 No.2

Flexible Polymer Electrolyte with High Conductivity and Thermal/Mechanical Stability for Lithium Battery

Dukjoon Kim(김덕준) 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1

Solid polymer electrolyte (SPE) was prepared from PAEK-g-PEG and PYR14-TFSI IL. Interfacial compatibility, lithium ion conductivity and transference number, thermal, mechanical and dimensional stability for lithium battery applications were investigated and correlated to ion cluster dimension examined by SAXS. The synthesized SPE illustrated thermal degradation temperature over 200 ℃, elongation at break of 250% and negligible dimensional change at 120 ℃. This flexible SPE exhibited the highest ion conductivity of ~ 1×10^-3 S cm^-1 at room temperature. As the active electrode materials such as LCO and NMC622 were quite compatible with SPE, the battery cells fabricated by binding the SPE and cathode layer showed excellent cell performance of 139.01 mAh g^-1 (LCO) and 158.15 mAh g^-1 (NMC 622) at 0.1 C. When this multi-functional SPE was applied to the lithium sulfur battery system, the cell discharge capacity was even higher than 925 mAh g^-1 at 0.1C with cyclic stability (>50 cycles).

Structure and properties of polymer electrolyte membranes based on poly(arylene ether ketone) for fuel cell application

Dukjoon Kim 한국고분자학회 2016 한국고분자학회 학술대회 연구논문 초록집 Vol.41 No.2

Straightforward Fabrication of Solid State Lithium Batteries Using Multi-Functional Polymer Electrolytes

Dukjoon Kim(김덕준) 한국고분자학회 2023 한국고분자학회 학술대회 연구논문 초록집 Vol.48 No.1

국내 석회석 광산에서 주방식하이브리드 채광법의 채수율 분석

권덕준(Dukjoon Kwon),김재동(Jaedong Kim) 한국암반공학회 2017 터널과지하공간 Vol.27 No.3

고품위 석회석에 대한 수요는 점차 증가하고 있는 반면, 국내 석회석 광산에서의 고품위 석회석 생산은 체계적인 개발 계획의 부재, 고품위 광체에 대한 선택적 채광 기술의 부족, 환경보호에 대한 사회적 인식 제고에 따른 고비용 갱내 채광으로의 전환, 채수율 제고를 위한 채광기술의 개발 노력 부족, 산업의 영세성 등과 같은 여러 문제들로 인하여 원활하게 진행되지 않고 있다. 본 연구에서는 3D 모델링 기법을 활용하여 대성MDI 동해사업소 대평지구의 지질구조 및 광체, 갱도 및 채굴적을 포함하는 3D 모델을 구축하였으며, 이를 토대로 주방식 하이브리드 채광법을 시험 적용하여 확정매장량, 가채광량 및 채수율을 산정하고 이를 기존의 주방식 채광법에 의한 결과와 비교 분석하였다. Test-bed 구역에서 주방식하이브리드 채광법의 시험 적용 결과를 분석한 결과 채수율이 71.6%로, 약 26%p. 향상되는 결과를 얻었다. Demand for high-grade limestone is increasing, but the production in the domestic mines has been limited due to the lack of systematic development plans and efforts to develop mining technology to improve the recovery ratio, transition to high-cost underground mining due to increasing social awareness of environmental protection, and the smallness of the domestic mining industry, etc. In this study in connection with this issue, an analysis on the recovery change by improvement of mining method was executed. 3D modeling technique was used to construct a 3D model. 3D model includes the geological structure, the limestone ore body and the underground pits and tunnels excavated at the Daepyeong District of Daesung MDI Donghae District. By using the 3D model, measured resources, reserves and ore recovery were evaluated from the results of pilot operation of the room and pillar hybrid mining method, which is a variant of room and pillar mining method. These results were compared with those obtained from the conventional mining method. The ore recovery obtained by hybrid mining method was found to be up to 71.6%, showing about 26%p. increase compared with the case of conventional mining method.

Barrier Property and Morphology of Polypropylene/Polyamide Blend Film

Kim, Dukjoon,Kim, Seong Woo 한국화학공학회 2003 Korean Journal of Chemical Engineering Vol.20 No.4

The barrier property of polypropylene (PP)/polyamide (PA) blend film produced by the extrusion casting film process was studied by investigating the effects of rheological properties of each components, compatibilizer content, screw rpm, and the absorbed moisture, and by performing morphological analysis and permeability modeling. The oxygen barrier property of blend film with ellipsoidal structure of PA dispersed phase was significantly improved by a factor of 5.4 with the addition of only 20 wt% PA, when compatibilizer was added by the content of 7 phr and the PP matrix resin and process condition was selected to induce lower viscosity ratio less than unity. Using Fricke’s model with the value of 19.6 of aspect ratio of the ellipsoid, the permeabilities of blend films as a function of PA content could be predicted and exhibited a good agreement with the experimental results. The absorbed moisture had a significant influence on the barrier property of the PP/PA blend system, suggesting that the hygroscopic P resin should be incorporated with the high water barrier PP resin by the amount below about 20 wt% to minimize the deterioration of the barrier property in the humid atmosphere.

Analysis of Dye Diffusion Behavior in Poly(dimethyl siloxane) Film Using Total Internal Reflection Fluorescence(TIRF)

Kim, Dukjoon 成均館大學校 科學技術硏究所 1995 論文集 Vol.46 No.2

유리기판에 코팅되어져 아세톤에 의해 팽윤되어지는 poly(dimethyl siloxane) (PDMS)필름에 아세톤과 함께 침투되는 dye의 확산거동을 total internal reflection fluorescence(TIRE) 방법을 이용하여 살펴보았다. Dye의 확산에 따른 fluorescence 강도분율과 dye의 확산 질량분율을 Fick의 확산 모델을 이용해 예측하였다. 확산모델에 의해 예측된 TIRF 거동을 실제의 TIRF 실험데이테와 일치시킴으로써 PDMS 필름내에서의 dye 확산계수를 얻을 수 있었다. TIRF 실험데이터 중 fluorescence의 강도변화는 I) 필름내에서의 감쇄파와 ii) 산란이 그 원인이 되었다. Dye의 확산계수는 2.8 x 10 exp(-8)㎠/s 이었다. The dye diffusion behavior in the acetone induced swelling poly (dimethyl siloxane) (PDMS) film coated on the glass slide was investigated using total internal reflection fluorescence (TIRF) technnique. The fractional fluorescence intensity and fractional dye mass uptake were predicted from the Fickian diffusion approximates. The dye diffusion coefficient inside the PDMS sample was determined from the best curve fits of the predictive fluorescent intensities founded on the Fickian model to the experimental TIRF data. The fluorescent intensity in the experimental TIRF was influenced by i.) the evanescence wave and ii) the scattering inside the film. The resulting dye diffusion coefficient was 2.8 x 10 exp(-8) ㎠/s.

일제강점기 재만 조선인 소설 연구 - 이주 정착 양상을 중심으로

정덕준(Chung Dukjoon),정현숙(Jung Hyunsook) 한국언어문학회 2006 한국언어문학 Vol.57 No.-

  This study sought to examine the immigration pattern and settlement process of the Korean immigrants described in the Korean immigrant literature on Manchuria in the period of Japanese colonial rule and by doing so, to identify the nature of the Korean immigrant literature on Manchuria and the meaning of a national literature.<BR>  The Korean immigrant literature on Manchuria described the tragedy of the early Korean immigrants as well as a strong intention for resettlement in Manchuria.<BR>  An Sugil"s “Byu” “Bookhangdo”, Kim Changgul"s “Armya”, Hyun Kyungjoon"s “Sungusidae” are the representative literature. Besides, the Korean immigrant literature on Manchuria criticized on the Manchuria"s policy and expressed strong resistance toward it. Sihn Seoya"s “Chusuk”, Hyun Kyungjoon"s “Milsoo” “Byul” are the exemplary literature on the above described critique and resistance. Furthermore, these literature criticized the contradiction of Manchuria"s policy through the phenomena of drug addiction and articulated a despair of the intellectual. Those characteristics are well described in Hwang Gun"s “Jehwa”, Kang Kyungae"s “Mayack”, Hyun Kyungjoon"s “Mayemye kumsun”, Choi Myungik"s “Simmoon”.<BR>  All of these literature realistically described the migration experience and resettlement process by focusing on the various life styles and experiences of the Korean immigrants on Manchuria.

박 미하일 소설 연구

정덕준(Chung Dukjoon),김게르만(Kim German) 한국언어문학회 2015 한국언어문학 Vol.94 No.-

Park Mikhail is not ex-Sakhalin writer and ex-Yeonhaeju writer, and so ex-North Korea writer. He was born Uzbekistan, and studied in Tadzhikistan, and then mostly worked in Kazakhstan, and now is around Russia. He thinks CIS Korean's matter integrated with Soviet regime's contradiction. And in the process he does not erase nationalty and does not hold in bondage, and he seeks rather prospect to overcome CIS Korean's matter and Soviet regime's contradiction through characters that strive high-artistic achievement. The works Sunflower Petal Flutter has two novels as Sunflower Petal Flutter and A pier of Angels. This two novels are very meaningful to writer. The former ferrets out the writer's identitat with reference to CIS Korean's history of migration, the latter is the novel that writer thinks most valuably. This two novels have all painter heros as writer's other self. Park Mikhail redintegrates CIS Korean's history of migration through the novel Sunflower Petal Flutter, and at the same time strives the writer's Identit„t(identity) as CIS Korean writer. In other words, he seeks prospect to overcome the hard lives of Joseon Persons of migration and for the moment unreasonable reality, and at the same time ferrets out the writer's Identit„t as CIS Korean. A pier of Angels embodies many contradictions that Joseon Persons of migration have been suffered under Soviet regime, and at the same time ferrets out the writer's Identit„t as CIS Korean. Especially A pier of Angels does not erase nationalty and does not hold in bondage, and it seeks rather prospect to overcome CIS Korean's matter and Soviet regime's contradiction through the artistic world that does not pander to the contradiction. Ultimately the writer counterbalances between nation and ex-nation. This is the writer Park Mikhail's prominent feature.