Hildebrand solubility parameters of ionic liquids : effects of ionic liquid type, temperature and DMA fraction in ionic liquid

The Hildebrand solubility parameters of 10 ionic liquids were investigated using the approach of intrinsic viscosity. Effects of dimethylacetamide (DMA) fraction in ionic liquids and dissolution temperature on the Hildebrand solubility parameter were also studied. Moreover, cohesive energy density,...

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Main Authors: Weerachanchai, Piyarat, Chen, Zhengjian, Leong, Susanna Su Jan, Chang, Matthew Wook, Lee, Jong-Min
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/99382
http://hdl.handle.net/10220/12849
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-993822020-03-07T11:35:34Z Hildebrand solubility parameters of ionic liquids : effects of ionic liquid type, temperature and DMA fraction in ionic liquid Weerachanchai, Piyarat Chen, Zhengjian Leong, Susanna Su Jan Chang, Matthew Wook Lee, Jong-Min School of Chemical and Biomedical Engineering The Hildebrand solubility parameters of 10 ionic liquids were investigated using the approach of intrinsic viscosity. Effects of dimethylacetamide (DMA) fraction in ionic liquids and dissolution temperature on the Hildebrand solubility parameter were also studied. Moreover, cohesive energy density, molar internal energy and enthalpy of dissolution were calculated. Cation and anion of an ionic liquid shows a significant influence on the solubility parameter. The values of ionic liquids containing BMIM cations are in the following order: [PF6] > [Tf2N] > [Cl], while those of ionic liquids containing EMIM cations are in the order: [BF4] > [DEPO4] > [AC]. Ionic liquid containing HOEMIM exerts the highest solubility parameter than that containing MBPYRRO or BMIM. Considering effect of varying DMA fraction, the Hildebrand solubility parameters of the mixtures do not correspond to the mixing rule. Their values tend to be closer to those of the ionic liquids than that of DMA for 40–90 vol% DMA added in the ionic liquids (1-Ethyl-3-methylimidazolium acetate (EMIM-AC) and 1-Butyl-3-methylimidazolium chloride (BMIM-Cl)). With increasing temperature from 25 to 60 °C, decreases of Hildebrand solubility parameters from 25.2 to 24.7 for EMIM-AC and the mixture of EMIM-AC/DMA (60–40 v/v) were obtained. The cohesive energy densities of ionic liquids at the different conditions are proportional directly with the Hildebrand solubility parameter. The molar internal energy and the enthalpy of dissolution decrease with increasing DMA fraction in ionic liquids, while they are almost constant or show slight decreases with the increase of dissolution temperature for EMIM-AC and the mixture of EMIM-AC/DMA (60–40 v/v), respectively. 2013-08-02T03:25:20Z 2019-12-06T20:06:38Z 2013-08-02T03:25:20Z 2019-12-06T20:06:38Z 2012 2012 Journal Article Weerachanchai, P., Chen, Z., Leong, S. S. J., Chang, M. W.,& Lee, J. M. (2012). Hildebrand solubility parameters of ionic liquids: Effects of ionic liquid type, temperature and DMA fraction in ionic liquid. Chemical Engineering Journal, 213, 356-362. 1385-8947 https://hdl.handle.net/10356/99382 http://hdl.handle.net/10220/12849 10.1016/j.cej.2012.10.012 en Chemical engineering journal
institution Nanyang Technological University
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language English
description The Hildebrand solubility parameters of 10 ionic liquids were investigated using the approach of intrinsic viscosity. Effects of dimethylacetamide (DMA) fraction in ionic liquids and dissolution temperature on the Hildebrand solubility parameter were also studied. Moreover, cohesive energy density, molar internal energy and enthalpy of dissolution were calculated. Cation and anion of an ionic liquid shows a significant influence on the solubility parameter. The values of ionic liquids containing BMIM cations are in the following order: [PF6] > [Tf2N] > [Cl], while those of ionic liquids containing EMIM cations are in the order: [BF4] > [DEPO4] > [AC]. Ionic liquid containing HOEMIM exerts the highest solubility parameter than that containing MBPYRRO or BMIM. Considering effect of varying DMA fraction, the Hildebrand solubility parameters of the mixtures do not correspond to the mixing rule. Their values tend to be closer to those of the ionic liquids than that of DMA for 40–90 vol% DMA added in the ionic liquids (1-Ethyl-3-methylimidazolium acetate (EMIM-AC) and 1-Butyl-3-methylimidazolium chloride (BMIM-Cl)). With increasing temperature from 25 to 60 °C, decreases of Hildebrand solubility parameters from 25.2 to 24.7 for EMIM-AC and the mixture of EMIM-AC/DMA (60–40 v/v) were obtained. The cohesive energy densities of ionic liquids at the different conditions are proportional directly with the Hildebrand solubility parameter. The molar internal energy and the enthalpy of dissolution decrease with increasing DMA fraction in ionic liquids, while they are almost constant or show slight decreases with the increase of dissolution temperature for EMIM-AC and the mixture of EMIM-AC/DMA (60–40 v/v), respectively.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Weerachanchai, Piyarat
Chen, Zhengjian
Leong, Susanna Su Jan
Chang, Matthew Wook
Lee, Jong-Min
format Article
author Weerachanchai, Piyarat
Chen, Zhengjian
Leong, Susanna Su Jan
Chang, Matthew Wook
Lee, Jong-Min
spellingShingle Weerachanchai, Piyarat
Chen, Zhengjian
Leong, Susanna Su Jan
Chang, Matthew Wook
Lee, Jong-Min
Hildebrand solubility parameters of ionic liquids : effects of ionic liquid type, temperature and DMA fraction in ionic liquid
author_sort Weerachanchai, Piyarat
title Hildebrand solubility parameters of ionic liquids : effects of ionic liquid type, temperature and DMA fraction in ionic liquid
title_short Hildebrand solubility parameters of ionic liquids : effects of ionic liquid type, temperature and DMA fraction in ionic liquid
title_full Hildebrand solubility parameters of ionic liquids : effects of ionic liquid type, temperature and DMA fraction in ionic liquid
title_fullStr Hildebrand solubility parameters of ionic liquids : effects of ionic liquid type, temperature and DMA fraction in ionic liquid
title_full_unstemmed Hildebrand solubility parameters of ionic liquids : effects of ionic liquid type, temperature and DMA fraction in ionic liquid
title_sort hildebrand solubility parameters of ionic liquids : effects of ionic liquid type, temperature and dma fraction in ionic liquid
publishDate 2013
url https://hdl.handle.net/10356/99382
http://hdl.handle.net/10220/12849
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