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구종민 ( Chong Min Koo ),유시원 ( Si Won Yu ),백범기 ( Bum Ki Baek ),조항규 ( Hang Kyu Cho ),이윤우 ( Youn Woo Lee ),홍순만 ( Soon Man Hong ) 한국고무학회 2012 엘라스토머 및 콤포지트 Vol.47 No.2
열경화성 고분자들은 불융/불용 특성으로 인하여 현재 개발된 재활용 기술의 부재로 대부분 매립 또는 소각처리 되어지고 있다. 하지만 환경요염 문제 및 자원의 재활용 측면에서 가교고분자의 재활용 기술이 크게 주목 받고 있으며 본 논문에서는 최근 주목받고 있는 초임계 공정에 의한 가교고분자 재활용 방법에 관하여 소개하고자 한다. Industrial wastes of crosslinked polymers have been burned or disposed of in landfills because there is no recycling technology due to their insoluble and infusible network chain structure. However, recycling of cross-linked polymers has been taken a growing attention because of issues of environmental pollution and of resources conservation. In this paper, uprising recycling technologies of crosslinked polymers using supercritical fluid are reviewed.
2D MXene Dispersions and Their Electronic Applications
Chong Min Koo(구종민) 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
MXenes, 2D transition metal carbides, nitrides, or carbonitrides, have been attracted in many electronic and optoelectronic applications, due to their high electronic conductivity (~5000 S/cm), hydrophilicity, and solution processability. However, they suffer from poor stability against oxidative degradation and poor dispersion stability in organic environments. This presentation demonstrates a simple and scalable way to prepare Ti3C2Tx MXene dispersions in non-polar organic solvents. The MXene organic dispersions also exhibit strong oxidation resistance and stable long-term storage. Additionally, the stable MXene dispersions provide an opportunity to prepare printable flexible MXene films or electrodes for various flexible electronic applications including EMI shielding, flexible joule heater and LED display.
특허와 논문으로 본 초임계유체 이용 불융/불용 폐플라스틱 자원순환기술 동향
홍순만,구종민,조영주,조봉규,Hong, Soon-Man,Koo, Chong Min,Cho, Young-Ju,Cho, Bong-Gyoo 한국자원리싸이클링학회 2014 資源 리싸이클링 Vol.23 No.3
초임계 유체공정 및 반응상용화에 의한 불융/불용성 폐플라스틱 재활용은 다양한 분야에서 응용이 가능하며, 고부가가치의 신제품생산과 연계하여, 국내 유화산업의 국제 경쟁력 확보가 가능하다고 판단된다. 본 연구에서는 초임계유체를 이용하여 불융/불용 폐플라스틱의 자원순환기술에 대한 특허와 논문을 분석하였다. 분석범위는 1993년에서 2012년까지의 미국, 유럽연합, 일본, 한국의 등록/공개된 특허와 SCI 논문으로 제한하였다. 특허와 논문은 키워드를 사용하여 수집하였으며, 기술의 정의에 의해 필터링하였다. 특허와 논문의 동향은 연도, 국가, 기업, 기술 등에 따라 분석하여 고찰하였다. It is believed to have the international competitiveness of the domestic petrochemical in conjunction with the production of high value-added new product and variety of application by supercritical fluid process and the reaction of infusible/insoluble plastic wastes recycling. In this article, the patents and papers for the recycling of organic residues from the plastic wastes using supercritical fluids were collected and analyzed. The open patents of USA (US), European Union (EP), Japan (JP), and Korea (KR) and SCI journals from 1993 to 2012 were investigated. The patents and journals were collected using key-words and filtered by the definition of the technology. The patents and journals were analyzed by the years, countries, companies, and technologies and the technical trends were discussed in this paper.
분체공학 , 유동층 , 고분자 , 재료 ( 무기 , 유기 ) : 옥타데실아민과 폴리스티렌을 이용한 탄소나노튜브의 화학적 개질
함형택(Hyeong Taek Ham),구종민(Chong Min Koo),김상욱(Sang Ouk Kim),최용석(Yeong Suk Choi),정인재(In Jae Chung) 한국화학공학회 2002 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.40 No.5
The solubility enhancements of singlewall carbon nanotubes(SWNTs) in various organic solvents were investigated by chemical modification of SWNTs. Carboxylic acids were attached to the open ends of SWNTs during purification and cutting. Octadecylamine and amino-terminated polystyrene were grafted to cut SWNTs via the formation of amide functionality. SWNTs with carboxylic acid bond were not dispersed well in organic solvents. But, polystyrene-grafted SWNTs and octadecylamine-grafted SWNTs were dispersed well in some organic solvents.
분체공학 유동층 재료 ( 무기 , 유기 , 고분자 ) / PP-g-MA / 층상 실리케이트 나노복합체의 제조 및 물성에 관한 연구
김미정(Mi Jung Kim),최민호(Min Ho Choi),구종민(Chong Min Koo),김상욱(Sang Ouk Kim),정인재(In Jae Chung) 한국화학공학회 2000 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.38 No.5
PP-g-MA/layered silicate nanocomposites were prepared by melt intercalation method using PP modified with malefic anhydride (PP-g-MA) by solid-phase grafting process and montmorillonite modified with octadecyl ammonium ion (C18M). The graft level of PP-g-MA was about 2.0% when measured by ¹H NMR and elemental analysis. XRD patterns and TEM micrographs showed that PP-g-MA was successfully intercalated into C18M. A PP-g-MA/layered silicate nanocomposite had higher tensile strength and modulus than PP and PP-g-MA. Especially, it showed a dramatically increased tensile modulus up to the silicate content of 3wt% and the constant modulus over silicate content of Swt%. Dynamic storage modulus and complex viscosity of the nanocomposites were higher than those of PP-g-MA. They increased considerably up to silicate content of 1 wt%, but increased slowly over this content like the tensile modulus. It was found that the nanocomposites showed the faster crystallization than PP-g-MA.