極低共熔溶劑及其水溶液之密度、黏度及擴散係數量測研究

Measurements of Density, Viscosity, and Diffusion Coefficient of Deep Eutectic Solvents and their Aqueous Solutions

謝延鵬(Yan-Peng Hsieh)

指導教授 ： 李夢輝

中原大學/工學院/化學工程研究所/碩士(2011年)

https://doi.org/10.6840/cycu201100493

摘要

本研究為量測極低共熔溶劑Reline (Choline Chloride + Urea)、Maline (Choline Chloride + Malonic acid)、Ethaline (Choline Chloride + Ethanediol)、Glyceline (Choline Chloride + Glycerol)；在水溶液中之無限稀釋擴散係數(infinite dilution diffusion coefficient)、交互擴散係數(mutual diffusion coefficient)、黏度(viscosity)及密度(density)數據量測。擴散係數量測方法依據泰勒分散法(Taylor dispersion technique)之原理。實驗操作在一大氣壓下來量測，溫度範圍為30至50 ℃；濃度範圍為10 ~ 40 wt %。實驗所得之數據使用由學者Snijder (1993)所提一簡單關係式再進一步修正之關係式，與學者Hsu and Chen (1998)所推演出雙成份的交互擴散係數方程式(UNIDIF)來表示及回歸參數，並且由學者Dymond (1974)所提之粗硬球理論(RHS)來解釋實驗上所取得的擴散係數跟溫度與濃度的關係。在黏度與密度的量測，實驗所得之數據也由Modified Vogel-Tamman-Fulcher equation及Redlich-Kister-type來各別表示並回歸參數。

關鍵字

黏度 ； 密度 ； 極低共熔溶劑 ； 擴散係數

並列摘要

This study presents measurements of the diffusion coefficients of deep eutectic solvent (DES) in water at infinite dilution and solute concentrations ranged from 10 to 40 wt% and temperatures ranged from 30 to 50℃. Four DES systems were studied namely：Choline Chloride + Urea (Reline), Choline Chloride + Malonic acid (Maline), Choline Chloride + Ethanediol (Ethaline) and Choline Chloride + Glycerol (Glyceline). Diffusion coefficients were measured using the Taylor dispersion technique and validated by the mutual diffusion coefficient of ethylene glycol in water. The diffusion coefficients of DES in water at infinite dilution as well as the mutual diffusion coefficients were varied systematically with the concentration of the DES. The obtained mutual diffusion coefficients correlated as a function of temperature and concerationto by using empirical and semi-empirical equations. Such correlations were found to satisfactory present the dependence of the diffusion coefficient to the temperature and concentration as indicated by the low varies of the absolute average deviation between the experiment and predicted data. The densities and viscosities of the DES systems were also measured their temperature and concentration dependences were represented by the modified Redlich-Kister-type equation and the modified Vogel-Tamman-Fulcher equation respectively.

並列關鍵字

density ； viscosity ； diffusion coefficient ； deep eutectic solvents

參考文獻

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