A simple method for estimating mutual diffusion coefficients of ionic liquids-water based on an optofluidic chip | |
Department | 绿色化学研究发展中心 |
He, Xiaodong1; Shao, Qunfeng1; Kong, Weijie1; Yu, Long1; Zhang XP(张晓萍)1; Deng YQ(邓友全)2; Zhang XP(张晓萍); Deng YQ(邓友全) | |
2014 | |
Source Publication | Fluid Phase Equilibria |
ISSN | 0378-3812 |
Volume | 366Pages:9-15 |
Abstract | An optofluidic method based on a liquid-core and liquid-cladding optical waveguide is proposed for roughly estimating the extent of diffusive mixing between two fluids. The mutual diffusion coefficient was estimated from a charged coupled device (CCD) camera image of light-focusing in accordance with predictions of a three-dimensional model. To check the validity of our proposed method, mutual diffusion coefficients of aqueous solutions of ethylene glycol at different volume fractions were measured, firstly. Then, mutual diffusion coefficients of eight 1,3-methylimidazolium ionic liquids-water binary systems were estimated at 298.2 K. Our results show that the mutual diffusion coefficients, in order of decreasing values, are as follows: [Emim][N(CN)2] > [Mmim][BF4] > [Emim][BF4] > [Bmim][NO3] > [Bmim][N(CN)2] > [Emim][ClO4] > [Bmim][BF4] > [Bmim][ClO4], it is well correlated to molecular weights of the ionic liquids. Finally, mutual diffusion coefficients of three ionic liquids-water binary systems at temperatures ranging from 298.2 to 338.2 K were measured, which is sensitive to temperature and increases quickly with it. Our results show a moderate discrepancy, but this proposed optofluidic method allows one to perform diffusion measurements with a simple, costless and microlitre volume manner in highly confined spaces. |
Keyword | Mutual Diffusion Coefficient Ionic Liquids Optofluidic Finite Element Simulation |
Subject Area | 物理化学与绿色催化 |
DOI | 10.1016/j.fluid.2014.01.003 |
Funding Organization | the National Natural Science Foundation of China (No. 21373247);the “Spring Sunshine” (2012);the Fundamental Research Funds for the Central Universities (lzujbky-2012-53) |
Indexed By | SCI |
If | 2.200 |
Language | 英语 |
Funding Project | 绿色催化课题组 |
compositor | 第二作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/21238 |
Collection | 羰基合成与选择氧化国家重点实验室(OSSO) |
Corresponding Author | Zhang XP(张晓萍); Deng YQ(邓友全) |
Affiliation | 1.Lanzhou Univ, Sch Informat Sci & Engn, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Green Chem & Catalysis, Lanzhou 730000, Peoples R China |
Recommended Citation GB/T 7714 | He, Xiaodong,Shao, Qunfeng,Kong, Weijie,et al. A simple method for estimating mutual diffusion coefficients of ionic liquids-water based on an optofluidic chip[J]. Fluid Phase Equilibria,2014,366:9-15. |
APA | He, Xiaodong.,Shao, Qunfeng.,Kong, Weijie.,Yu, Long.,Zhang XP.,...&邓友全.(2014).A simple method for estimating mutual diffusion coefficients of ionic liquids-water based on an optofluidic chip.Fluid Phase Equilibria,366,9-15. |
MLA | He, Xiaodong,et al."A simple method for estimating mutual diffusion coefficients of ionic liquids-water based on an optofluidic chip".Fluid Phase Equilibria 366(2014):9-15. |
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20149-15.pdf(1806KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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