文献类型：期刊文献

英文题名：LCST-Type Phase Behavior of Aqueous Biphasic Systems Composed of Phosphonium-Based Ionic Liquids and Potassium Phosphate

作者：Gao, Jing[1];Guo, Jieyi[1];Nie, Fanghong[1];Ji, Hongwu[1];Liu, Shucheng[1]

机构：[1]Guangdong Ocean Univ, Coll Food Sci & Technol, Guangdong Prov Key Lab Aquat Prod Proc & Safety, Key Lab Adv Proc Aquat Prod,Guangdong Higher Educ, Zhanjiang 524088, Peoples R China

年份：2017

卷号：62

期号：4

起止页码：1335

外文期刊名：JOURNAL OF CHEMICAL AND ENGINEERING DATA

收录：SCI-EXPANDED(收录号：WOS:000399436000022)、、EI(收录号：20172303734393)、Scopus(收录号：2-s2.0-85020048312)、WOS

基金：The project was supported by the Fund for Guangdong Province Innovation School Project (2015KQNCX061, GDOU2015050240), and Fund of Key Laboratory of Aquatic Product Processing, Ministry of Agriculture, China (B16387).

语种：英文

外文关键词：Bromine compounds - Hydrophilicity - Biocompatibility - Ionic liquids - Solvent extraction

外文摘要：Although aqueous biphasic systems (ABS) composed of phosphonium-based ionic liquids (ILs) have demonstrated superior performance as viable media for biocompatible extraction processes, the formation of ABS with tetrabutylphosphonium trifluoroacetate ([P-4444]CF3COO) and tributyloctylphosphonium bromide ([P-4448]Br) were seldom investigated. To evaluate the hydrophilicity of [P-4444]CF3COO and [P-4448]Br, the solubility curves for the mixture of the ILs and water were determined. The influence of temperature on the phase behavior for the [P-4448]Br + K3PO4 + H2O and [P-4444] CF3COO + K3PO4 + H2O systems were also obtained. Results show that both [P-4448]Br + H2O and [P-4444]CF3COO + H2O binary systems undergo lower critical solution temperature-type phase transition, and the ABS composed of [P-4444]CF3COO and [P-4448]Br can be formed with K3PO4 at a wide range of temperatures. Moreover, the ABS are highly temperature dependent, and biphasic region expands with an increase in temperature. On the other hand, the capability of the ILs to induce ABS follows the tread [P-4448]Br > [P-4444]CF3COO. This suggests that the lower cation hydro philicity of ILs results in greater biphasic area in the ABS formed by phosphonium-based ILs.