Articles & Issues
- Language
- korean
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
-
Received March 12, 2012
Accepted April 15, 2012
-
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.
All issues
모폴린계 이온성 액체의 열 및 전기화학적 안정성
Thermal and Electrochemical Stability of Morpholinium Ionic Liquids
한국교통대학교 화공생물공학과, 380-702 충북 충주시 대학로 50 1한국교통대학교 컴퓨터공학과, 380-702 충북 충주시 대학로 50
Chemical and Biological Engineering, Korea National University of Transportation, 50 Daehak-ro, Chungju, Chungbuk 380-702, Korea 1Computer Engineering, Korea National University of Transportation, 50 Daehak-ro, Chungju, Chungbuk 380-702, Korea
Korean Chemical Engineering Research, August 2012, 50(4), 702-707(6), NONE Epub 25 July 2012
Download PDF
Abstract
지난 수십 년간 다양한 산업에서 사용된 유독 화학물질은 심각한 환경오염을 초래했다. 그리고 이산화탄소나 메탄가스 같은 부산물로 인해 지구 온난화를 가속화 시켰다. 그래서 현재 사용하고 있는 유기 용매를 대체할 새로운 환경친화적인 소재 개발의 중요성이 부각되고 있다. 이온성 액체는 비휘발성, 비가연성, 화학적 불활성과 같은 친환경적인 물성을 지니고 있다. 이 밖에도 넓은 전기화학적 범위, 높은 전기전도도, 넓은 열적 작용 범위 그리고 유기용매와의 높은 용해성과 같은 물성을 지니고 있어 합성용매, 촉매제, 가스추출제로서 각광받고 있는 물질이다. 이번 연구에서는 모폴린 계열의 이온성 액체인 N-ethyl-N-methylmorpholine Bromide, N-butyl-N-methylmorpholine Bromide, N-octyl-Nmethylmorpholine Bromide, N-ethyl-N-methylmorpholine Tetrafluoroborate, N-butyl-N-methylmorpholine Tetrafluoroborate, N-octyl-N-methylmorpholine Tetrafluoroborate, N-ethyl-N-methylmorpholine Hexafluorophosphate, N-butyl-N-methylmorpholine Hexafluorophosphate, N-octyl-N-methylmorpholine Hexafluorophosphate를 합성하였다. 합성물의 녹는점, 분해 온도, 전기화학적 안전성은 각각 DSC, TGA, CV로 측정하였다. 할로겐 음이온(Br.)을 지닌 이온성 액체는 대체로 높은 온도(150~200 ℃ )에서 녹는점 갖고, 비교적 낮은 열분해 온도(200~230 ℃ ), 좁은 전기화학적 안전성(3.4~3.6 V)을 보였다. 반면에 무기 음이온(BF4- , PF6- )을 지닌 이온성 액체들은 비교적 낮은 온도(50~110 ℃ )에서 녹는점을 가졌고, 높은 열분해 온도(250~380 ℃ ), 넓은 영역에 걸친 전기화학적 안전성(6.1~6.3 V)을 보였다. 뿐만 아니라 동일한 음이온에서도 양이온의 탄소 사슬의 길이에 따라 물성이 상이함을 확인할 수 있었다. 이번 연구를 통해 얻은 자료들은 이온성 액체의 상용화에 밑거름이 될 것이다.
During the last few decades, toxic chemicals used in various industries have caused global pollution and the side products such as carbon dioxide and methane gas have contributed to global warming. Thus, it is desirable to develop new alternative solvents. It is well known that ionic liquids display a variety of environmentally friendly physical properties: nonvolatile, nonflammable, wide electrochemical windows, high inherent conductivities, wide thermal operating ranges, chemically inert, and limited miscibilities with organic solvents. Because of these characteristics, ionic liquids are promising candidates as solvents for synthetic chemistries, catalysis, and gas separations. In this study, we synthesized morpholiunium salts as N-ethyl-N-methylmorpholine Bromide, N-butyl-N-methylmorpholine Bromide, Noctyl-_x000D_
N-methylmorpholine Bromide, N-ethyl-N-methylmorpholine Tetrafluoroborate, N-butyl-N-methylmorpholine Tetrafluoroborate, N-octyl-N-methylmorpholine Tetrafluoroborate, N-ethyl-N-methylmorpholine Hexafluorophosphate, Nbutyl-N-methylmorpholine Hexafluorophosphate, and N-octyl-N-methylmorpholine Hexafluorophosphate. The melting points, decomposition temperatures and electrochemical stabilities of the salts were measured by DSC, TGA, and CV,_x000D_
respectively. The salts with halide anion showed high melting points (150~200 ℃), low decomposition temperatures (200~230 ℃), narrow electrochemical stabilities (3.4~3.6 V). The synthesized salts with inorganic anions, on the other hand, presented low melting point (50~110 ℃), high decomposition temperatures (250~380 oC), wide electrochemical stabilities (6.1~6.3 V). We also found that the properties depend on the length of the carbon chain.
References
Martyn JE, Kenneth RS, Pure Appl. Chem., 72(7), 1391 (2000)
Ngo HL, LeCompte K, Hargens L, McEwen AB, Thermochim. Acta, 357-358, 97 (2000)
Welton T, Chem. Rev., 99(8), 2071 (1999)
Marsh KN, Deev A, Wu ACT, Tran E, Klamt A, Korean J. Chem. Eng., 19(3), 357 (2002)
Lee H, Lee JS, Ahn BS, Kim HS, J. Korean Ind. Eng. Chem., 16(5), 595 (2005)
Lee H, Lee JS, Kim HS, Appl. Chem. Eng., 21(2), 129 (2010)
Jang WJ, “A Study of Absorbent for Pre-Combustion CO2 Capture System,” Chung nam National University (2009)
Jin Y, Zheng J, Polyakova Y, Koo YM, Row KH, Korean Chem. Eng. Res., 44(5), 453 (2006)
Yoshizawa M, Ogihara W, Ohno H, Polym. Adv. Technol., 13(8), 589 (2002)
Bonhote P, Dias AP, Papageorgiou N, Kalyanasundaram K, Gratzel M, Inorg. Chem., 35(5), 1168 (1996)
Hagiwara R, Matsumoto K, Nakamori Y, Tsuda T, Ito Y, Matsumoto H, Momota K, J. Electrochem. Soc., 150(12), D195 (2003)
Hagiwara R, Ito Y, J. Flouorine Chem., 105(2), 221 (2000)
Ngo HL, LeCompte K, Hargens L, McEwen AB, Thermochim. Acta, 357-358, 97 (2000)
Welton T, Chem. Rev., 99(8), 2071 (1999)
Marsh KN, Deev A, Wu ACT, Tran E, Klamt A, Korean J. Chem. Eng., 19(3), 357 (2002)
Lee H, Lee JS, Ahn BS, Kim HS, J. Korean Ind. Eng. Chem., 16(5), 595 (2005)
Lee H, Lee JS, Kim HS, Appl. Chem. Eng., 21(2), 129 (2010)
Jang WJ, “A Study of Absorbent for Pre-Combustion CO2 Capture System,” Chung nam National University (2009)
Jin Y, Zheng J, Polyakova Y, Koo YM, Row KH, Korean Chem. Eng. Res., 44(5), 453 (2006)
Yoshizawa M, Ogihara W, Ohno H, Polym. Adv. Technol., 13(8), 589 (2002)
Bonhote P, Dias AP, Papageorgiou N, Kalyanasundaram K, Gratzel M, Inorg. Chem., 35(5), 1168 (1996)
Hagiwara R, Matsumoto K, Nakamori Y, Tsuda T, Ito Y, Matsumoto H, Momota K, J. Electrochem. Soc., 150(12), D195 (2003)
Hagiwara R, Ito Y, J. Flouorine Chem., 105(2), 221 (2000)
