کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4907293 | 1426198 | 2017 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Primary and secondary aqueous two-phase systems composed of thermo switchable polymers and bio-derived ionic liquids
ترجمه فارسی عنوان
سیستم های دو مرحله ای اولیه و ثانویه متشکل از پلیمرهای ترم قابل تعویض و مایعات یونی مشتق شده بیو
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کلمات کلیدی
تعادل مایع مایع، آمینوئید کلینیم، پلی (پروپیلن گلیکول)، ترمودینامیک، دمای محلول بحرانی پایین، سیستم دو مرحله ای آبیاری ثانویه،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
The liquid-liquid equilibrium (LLE) data for aqueous two-phase systems (ATPSs) comprising poly(propylene glycol) 400 (PPG 400) and cholinium-aminoate-based ([Ch][AA]) ionic liquid were determined experimentally at TÂ =Â (288.15 and 308.15)Â K, while the LLE data at TÂ =Â 298.15Â K was adopted from our previous work for comparison. The experimental binodal data were satisfactorily fitted to a temperature-dependent nonlinear empirical expression. The reliability of tie-line data was confirmed by fitting the experimental data with the Othmer-Tobias and Bancroft equations. Furthermore, for the first time, the electrolyte nonrandom two-liquid model (e-NRTL) was used to correlate the tie-line data of PPG 400Â +Â [Ch][AA]Â +Â water systems. The correlations of LLE data using these models provide a good description of the experimental values. The effect of temperature on the phase-forming capabilities of the corresponding [Ch][AA] was assessed using the experimental binodal data and the salting-out coefficient (k2) derived from the Setschenow-type equation. The values of k2 were well correlated to the phase-forming abilities of [Ch][AA], and were found to increase at higher temperature. Upon heating to 308.15Â K, the solution of (PPG 400)-rich top phase from the primary PPG 400Â +Â [Ch][AA]Â +Â water systems formed the secondary ATPSs. The LLE data of the secondary PPG 400Â +Â [Ch][AA]Â +Â water systems was also determined. The PPG 400 was concentrated in the top phase of the secondary ATPS; this could serve as a means to recover PPG 400 from the primary ATPS via the formation of secondary ATPS.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 115, December 2017, Pages 191-201
Journal: The Journal of Chemical Thermodynamics - Volume 115, December 2017, Pages 191-201
نویسندگان
Cher Pin Song, Ramakrishnan Nagasundara Ramanan, R. Vijayaraghavan, Douglas R. MacFarlane, Eng-Seng Chan, João A.P. Coutinho, Luis Fernandez, Chien-Wei Ooi,