陕西科技大学学报2024，Vol.42Issue(1)：37-44,8.
氯化胆碱/二醇基低共熔溶剂的理化性质及其结构表征
Physicochemical properties and structure characterizations of deep eutectic solvents based on choline chloride and different glycol
摘要
Abstract
In recent years,deep eutectic solvents(DESs)have attracted increasing attention due to their ionic liquid analogue.Compared with ionic liquids,deep eutectic solvents had more advantages such as low-cost,easy synthesis and wide application.In the present work,deep eutectic solvents were prepared from choline chloride and ethylene glycol,choline chlo-ride and 1,3-propanediol,choline chloride and 1,4-butanediol,respectively.At the same time their hydrogen bonding interactions were investigated by the FTIR and 1 H NMR.The effects of different temperatures(303.15～343.15 K),molar ratio and alkyl chain length on the physicochemical properties of deep eutectic solvents were researched.The results showed that the hydrogen bonding of choline chloride is weakened with the increase of polyol content in choline chloride/alcohol deep eutectic solvent,and the hydrogen bonding of polyol is en-hanced.It can form suitable hydrogen bonds when the choline chloride to ethylene glycol mo-lar ratio of is 1∶3.Also,with the increasing of temperature,the viscosity of deep eutectic solvent notably decreases while the conductivity increases.On the other hand,density is slight affected by the temperature change.Under the same temperature,the viscosity and po-larity of the deep eutectic solvent increases,and the conductivity,surface tension,and p H de-creases,as the length of the alkyl chain increases.As glycol content increases,the viscosity decreases,and the p H increases first and then decreases,while the polarity and surface ten-sion does not change significantly.The results of this study reveal the hydrogen bonding in-teraction of deep eutectic solvents based on choline chloride and different glycol.Further-more,the physicochemical properties of DESs can provide scientific guidance for its applica-tion in the extraction field,which is of great significance and value.关键词
低共熔溶剂/结构表征/粘度/电导率/极性/表面张力/pHKey words
deep eutectic solvent/structural characterization/viscosity/conductivity/polari-ty/surface tension/pH分类
化学化工引用本文复制引用
朱振宝,李翯..氯化胆碱/二醇基低共熔溶剂的理化性质及其结构表征[J].陕西科技大学学报,2024,42(1):37-44,8.基金项目
陕西省科技厅重点研发计划项目(2022NY-07) （2022NY-07）
