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Photo-induced Living Cationic Polymerization of Isobutyl Vinyl Ether in the Presence of Various Combinations of Halides of Diphenyliodonium and Zinc Salts in Methylene Chloride
Kwon. Soonhon, Chun. Hyunjeong, Mah. Soukil 한국섬유공학회 Fibers and polymers 6 Pages
한국섬유공학회 Fibers and polymers 2004, Vol.5 No.4 253-258 (6 pages)
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Prediction of Solvent Effects on Rate Constant of [2+2] Cycloaddition Reaction of Diethyl Azodicarboxylate with Ethyl Vinyl Ether Using Artificial Neural Networks
Habibi-Yangjeh. Aziz, Nooshyar. Mahdi 대한화학회 Bulletin of the Korean Chemical Society 7 Pages
대한화학회 Bulletin of the Korean Chemical Society 2005, Vol.26 No.1 139-145 (7 pages)
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Synthesis and Cationic Polymerization of 2-[p-($2^{prime},2^{prime},3^{prime},3^{prime}$-Tetracyanocyclopropyl)phenoxy] ethyl Vinyl Ether
Lee. Ju-Yeon, Kim. Kyoung-Ah 대한화학회 Bulletin of the Korean Chemical Society 4 Pages
대한화학회 Bulletin of the Korean Chemical Society 1994, Vol.15 No.10 913-916 (4 pages)
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Applications of carbon-based materials in solid phase micro-extraction: a review
Jian Guo, Soo-Jin Park, Long-Yue Meng, Xinghua Jin 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 2 10-17 (8 pages)
With continuous development in the field of sample preparation technology, solid phase micro-extraction (SPME) has been widely used in analytical chemistry for high extraction efficiency and convenient operation. Different materials lead to different extraction results. Among existing materials, carbon-based materials are still attracting attention from scientists due to their excellent physical and chemical properties as well as their modifiable surfaces, which could enhance the adsorption... -
Dispersions of partially reduced graphene oxide in various organic solvents and polymers
Hye Min Kim, Seo Gyun Kim, Heon Sang Lee 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 8 55-62 (8 pages)
We report on the dispersion state of partially reduced graphene oxide (PRGO) in organic solvents, namely methyl ethyl ketone, ethyl acetate, methylene chloride, toluene, and xylene, by controlling the carbon to oxygen (C/O) atomic ratio of the PRGOs. A two-phase solvent exchange method is also proposed to transfer PRGO from water to an aprotic solvent, such as methyl ethyl ketone. We achieve relatively good dispersion in aprotic and non-polar solvents by controlling the C/O atomic ratio of the... -
Effects of cross-linking methods for polyethylene-based carbon fibers: review
Kwan-Woo Kim, Hye-Min Lee, Jeong-Hun An, Byoung-Suhk Kim, Byung-Gak Min, Shin-Jae Kang, Kay-Hyeok An, Byung-Joo Kim 한국탄소학회 Carbon Letters 24 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.3 2 147-170 (24 pages)
In recent decades, there has been an increasing interest in the use of carbon fiber reinforced plastic (CFRP) in aerospace, renewable energy and other industries, due to its low weight and relatively good mechanical properties compared with traditional metals. However, due to the high cost of petroleum-based precursors and their associated processing costs, CF remains a specialty product and as such has been limited to use in high-end aerospace, sporting goods, automotive, and specialist... -
Facile preparation of self-assembled wool-based graphene hydrogels by electron beam irradiation
Mira Park, Bishweshwar Pant, Jawun Choi, Yong Wan Park, Chohye Lee, Hye Kyoung Shin, Soo-Jin Park4, Hak-Yong Kim 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.2 11 136-141 (6 pages)
solution of wool/poly(vinyl alcohol) and graphene oxide (GO). After exposure to various levels of EBI radiation, the highly porous, self-assembled, wool-based graphene hydrogels were characterized using scanning electron microscopy and Fourier-transform infrared spectroscopy; to determine the gel fraction, degree of swelling, gel strength, kinetics-of-swelling analyses and removal of hexavalent chromium (Cr(VI)) from the aqueous solution. X-ray diffraction results confirmed that EBI played a... -
Effect of chemically reduced graphene oxide on epoxy nanocomposites for flexural behaviors
Seul-Yi Lee, Mi-Hwa Chong, Mira Park, Hak-Yong Kim, Soo-Jin Park 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.1 9 67-70 (4 pages)
In this work, nanocomposites of epoxy resin and chemically reduced graphene oxide (RGO) were prepared by thermal curing process. X-ray diffractions confirmed the microstructural properties of RGO. Differential scanning calorimetry was used to evaluate the curing behaviors of RGO/epoxy nanocomposites with different RGO loading amounts. We investigated the effect of RGO loading amounts on the mechanical properties of the epoxy nanocomposites. It was found that the presence of RGO improved both... -
방사선 그라프트 PFA-폴리스티렌 멤브레인으로 제조한 직접 메탄올 연료전지용 MEA의 성능과 특성
강세구, 백동현, 김상경, 임성엽, 정두환, 박영철, 신준화, 강필현, 노영창, 설용건, Kang. Se-Goo, Peck. Dong-Hyun, Kim. Sang-Kyung, Lim. Seong-Yop, Jung. Doo-Hwan, Park. Young-C 한국전기화학회 전기화학회지 8 Pages
한국전기화학회 전기화학회지 2009, Vol.12 No.2 173-180 (8 pages)
Methanol Fuel Cell)용의 새로운 고분자 전해질 멤브레인을 개발하기 위하여 스티렌 단량체를 poly(tetrafluoroethylene perfluoropropyl vinyl ether) (PFA) 필름에 그라프트 중합 반응시킨 후에 술폰화 반응을 진행하였다. $Upsilon$-ray를 이용하여 방사선 그라프트 중합 반응시킨 방사선 그라프트 필름의 술폰화 반응은 chlorosulfonic acid/dichloroethane (5 v/v%) 혼합 용액에서 진행하였다. PFA 그라프트 폴리스티렌 멤브레인 (PFA-g-PSSA)의 화학적, 물리적, 전기화학적 및 형태의 특성은 푸리에 변환 적외선 분광기 (FTIR),... -
요오드를 개시제로 하는 t-부틸 비닐 에테르의 양이온 리빙중합
Mah. Soukil, Jeon. Hyunjeong 한국섬유공학회 韓國纖維工學會誌 7 Pages
한국섬유공학회 韓國纖維工學會誌 2004, Vol.41 No.4 291-297 (7 pages)
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Preparation and Characterization of Poly(styrenesulfonic acid)-grafted Fluoropolymer Membrane for Direct Methanol Fuel Cell
Choi. Jae-Hak, Kang. Phil-Hyun, Lim. Youn-Mook, Sohn. Joon-Yong, Shin. Jun-Hwa, Jung. Chan-Hee, Jeun. Joon-Pyo, Nho. Young-Chang 한국막학회 Korean membrane journal 5 Pages
한국막학회 Korean membrane journal 2007, Vol.9 No.1 52-56 (5 pages)
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산화첨가반응의 수득률에 미치는 용매효과에 관한 이론적 연구
이철재, 김병소, Lee. Chul-Jae, Kim. Byung-So 한국공업화학회 공업화학 4 Pages
한국공업화학회 공업화학 2010, Vol.21 No.5 586-589 (4 pages)
본 연구에서는 1,3-dicarbonyl 화합물과 올레핀 화합물의 산화첨가반응에서 $Ag_2CO_3$/celite (SC)를 촉매로 하여 1,3-cycleohexandion (1,3-CHD)과 ethyl vinyl ether (EVE)를 acetonitrile (AN), dimethyl sulfoxide (DMSO), benzene (BZ), heptane (HT)을 각각 용매로 하여 반응을 진행시켜 보았다. 그 결과 수득률이 78, 40, 15, 10%로 나타났다. 따라서 이러한 용매의 효과에 따른 수득률의 변화를 알아보기 위하여 하이퍼캠의 반경험적 방법으로 PM3와 ZINDO/1 파라미터를 이용하여 이론적 고찰을 해 보았다. -
새로운 내산성 PVA가교막을 이용한 불화에탄을 수용액과 메타크릴산 수용액의 투과증발분리
이수복, 안상만, 장봉준, 김정훈, 이용택, Lee. Soo-Bok, Ahn. Sang-Man, Chang. Bong-Jun, Kim. Jeong-Hoon, Lee. Yong-Taek 한국막학회 멤브레인 7 Pages
한국막학회 멤브레인 2005, Vol.15 No.3 206-212 (7 pages)
본 연구는 에스텔화 막반응공정에 의한 2,2,2-trifluoroethyl metacrylate (TFEMA)의 생산을 위한 선행연구로, 가교된 poly(vinyl alcohol)막을 이용하여 TFEA (2,2,2-trifluoroethanol)/water과 MA (methacrylic acid)/water 혼합용액을 대상으로 투과증발특성을 연구하였다. 산 저항성을 가진 가교된 PVA막은 PVA와 EGDE를 같이 녹인 수용액을 Teflon plate 위에 캐스팅한 후 $140^{circ}C$에서 열 가교시킴으로써 제조하였다. 제조된 막의 특성을 알아보기 위해 FT-IR과 팽윤도 측정을 실시하였다. TFEA/water 혼합용액에 대한... -
Flexural, electrical, thermal and electromagnetic interference shielding properties of xGnP and carbon nanotube filled epoxy hybrid nanocomposites
Young Sil Lee, Yeon Ho Park, Kwan Han Yoon 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 6 41-46 (6 pages)
The microstructure, flexural properties, electrical conductivity, thermal conductivity and electromagnetic interference (EMI) shielding effectiveness (SE) of epoxy composites filled with multi-walled carbon nanotubes (CNTs), exfoliated graphite nanoplatelets (xGnPs) and CNT-xGnP hybrid filler were investigated. The EMI SE of the CNT-xGnP hybrid composite was higher than 25 dB at 100 MHz while that of the xGnP based composite was almost zero. The flexural modulus of the CNT-xGnP based epoxy...
