疏水性低共熔溶剂氢键交互作用调控及萃取铜性能  

Hydrophobic deep eutectic solvent hydrogen bond interaction regulation and extraction performance of copper

作　　者：叶玉玺 丁晓茜 池华睿 朱楷伦 刘杨 王凌云 郭庆杰[1,3] YE Yuxi;DING Xiaoxi;CHI Huarui;ZHU Kailun;LIU Yang;WANG Lingyun;GUO Qingjie(College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China;College of Environmental,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China;State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,Ningxia University,Yinchuan 750021,Ningxia,China)

机构地区：[1]青岛科技大学化工学院,山东青岛266042 [2]青岛科技大学环境学院,山东青岛266042 [3]宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室,宁夏银川750021

出　　处：《化工进展》2022年第S01期397-406,共10页Chemical Industry and Engineering Progress

基　　金：山东省生态化工协同创新中心开放课题(STHGYX2216);省部共建煤炭高效利用与绿色化工国家重点实验室开放课题(2022-K24)。

摘　　要：制备了以薄荷醇为氢键受体,不同碳链长度的羧酸为氢键供体的薄荷醇-羧酸类疏水性低共熔溶剂。探索了低共熔溶剂体系的密度、黏度理化特性随温度变化的规律,利用超额摩尔性质与格伦伯格-尼桑相互作用力公式计算了过量摩尔体积、黏度偏差与相互作用力参数,分析了低共熔溶剂组分间的相互作用。通过傅里叶红外光谱表征,确定了低共熔溶剂组分间的氢键作用。以该类低共熔溶剂作萃取剂,考察了pH、组分间氢键交互作用力(氢键供体碳链长度、低共熔溶剂受供体摩尔比)对提取铜性能的影响。结果表明,薄荷醇-羧酸类疏水性低共熔溶剂中氢键交互作用更强的体系,由于羧基中氢的解离更容易实现,对铜的萃取效率更高。此外,通过对薄荷醇-羧酸类疏水性低共熔溶剂体系结构性质与组分间氢键作用的关系对铜的萃取机理进行了探讨,为揭示疏水性低共熔溶剂的构效关系与高性能低共熔溶剂的设计优化提供理论基础。A series of hydrophobic deep eutectic solvents(HDES)were synthesized with menthol as hydrogen bond acceptor and different kinds of carboxylic acids as hydrogen bond donor.The physicochemical properties of HDES system such as density and viscosity under different temperatures were investigated.The excess molar volume,viscosity deviation and interaction force parameters were calculated by using the excess molar property and the Glenberg-Nissan interaction force formula,and the interaction between components of HDES was analyzed.The hydrogen bonding between HDES components was determined by FTIR characterization.Solvent extraction of Cu^(2+) from aqueous phase was studied by the prepared HDES.The effects of pH,intercomponent interactions(carbon chain length of hydrogen bond donor,donor/acceptor molar ratio)on the extraction performance of copper were investigated.The results showed that the extraction efficiency of Cu^(2+) could be enhanced by the system with stronger hydrogen bond interaction among Men/Carboxylics-HDES,due to easier dissociation of hydrogen in carboxylic group.In addition,the extraction mechanism for copper was discussed through the relationship between the structure and properties of Men/Carboxylics-HDES system and the hydrogen bond interaction between components.The present work may provide a theoretical basis for revealing the structure-activity relationship of HDES and for further design of high-performance eutectic solvent.

关 键 词：疏水性低共熔溶剂 溶剂萃取 环境 分离 物化性质 氢键作用 

分 类 号：TQ413[化学工程]