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이산화탄소기반 고리형 카보네이트 및 폴리카보네이트 제조 연구 동향
권두연(Doo Yeon Kwon),김재일(Jae Il Kim),강휘주(Hwi Ju Kang),김다연(Da Yeon Kim),김재호(Jae Ho Kim),이봉(Bong Lee),김문석(Moon Suk Kim) 한국청정기술학회 2011 청정기술 Vol.17 No.3
온실효과 유발 이산화탄소는 학문적, 산업적 관점에서 이산화탄소 기반 폴리카보네이트 제조에 대한 원료로서 적용 가능하다. 그러므로 이산화탄소 기반 폴리카보네이트는 탁월한 경제적 녹색고분자이다. 최근 이산화탄소 기반 폴리카보네이트의 빠른 개발이 산업적으로 새로운 기회를 제공하고 있다. 본 총설에서는 다양한 촉매 존재하에서 이산화탄소 및 에폭사이드계열 화합물을 이용한 고리형 카보네이트 모노마 제조 및 제조된 모노마로부터 이산화탄소 기반 폴리카보네이트 제조에 대한 연구 동향을 설명하고자 한다. The green house gas, carbon dioxide, can be utilized as raw materials to prepare carbon dioxide-based polycarbonates in research and industry. The carbon dioxide-based polycarbonates is one of the emerging low-cost green polymers. Recently, the fast development of carbon dioxide-based polycarbonates has created new chances for industry. In this review, we describe the preparation and characterization of cyclic carbonate monomer using carbon dioxide, oxiranes and oxetanes in the presence of various catalysts and preparation of polycarbonates from cyclic carbonate monomer, presenting an organized and detailed overview of the state of the art.
So Hee Jang(장소희),Doo Yeon Kwon(권두연),Moon Suk Kim(김문석),Wan Doo Kim(김완두),Junhee Lee(이준희) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
In bone tissue engineering, gradually releasing of drug in reproduction period of the bone tissue can help to increase the therapeutic effects of bone. However, the traditional drug releasing system is not only hard to control the releasing time and amount of drug in certain period but also limited for practical application in the replacement of bone tissue area due to the insufficient strength. In this study, Methoxy poly(ethylene glycol)-poly(ε-caprolactone-co-L-lactide) (MPEG-PCLA) loaded with dexamethasone scaffold was prepared using 3D bio-printing system for suitable scaffold in bone tissue engineering. By adjusting the molar ratio of ε-caprolactone (CL) and L-lactide (LA), copolymer was synthesized and characterized. The properties such as the formation of composited materials depends on the ratio of monomer thermal property can be confirmed by Nuclear magnetic resonance analysis and Gel permeation chromatography, and Differential scanning calorimetry, respectively. After the fabrication of scaffold using 3D bio-printing, the physical property and releasing behavior of dexamethasone drug was measured.