金属络合阴离子型离子液体的合成、性能及对CO_2的捕集  

Synthesis and Characterization of Ionic Liquids with Metal Complex Anion and Its Capture to Carbon Dioxide

作　　者：邢素华[1] 丁靖[1] 虞大红[1] 彭昌军[1] 刘洪来[1] 

机构地区：[1]华东理工大学化学系,上海200237

出　　处：《华东理工大学学报（自然科学版）》2014年第3期273-278,共6页Journal of East China University of Science and Technology

基　　金：国家自然科学基金(21136004;21276073);国家重点基础研究计划(2009CB219902)

摘　　要：以1-丁基-3-甲基咪唑阳离子([Bmim]+)型离子液体[Bmim]X(X=Cl,Ac)和等物质的量的无机盐AXn(A=Fe,Zn)为原料,通过一步法合成了金属络合阴离子型离子液体[Bmim][AXn+1],测定了离子液体在不同温度下的密度和黏度,采用经验模型关联了密度、黏度与温度的关系,对比研究了CO2气体在[Bmim]X和[Bmim][AXn+1]中的溶解度。[Bmim]X和[Bmim][AXn+1]的密度和黏度均随温度升高而下降,金属络合阴离子型离子液体[Bmim][AXn+1]的密度远远大于对应的传统离子液体[Bmim]X的密度。[Bmim][ZnCl3]和[Bmim][Zn(Ac)3]的黏度远远高于对应的[Bmim]Cl和[Bmim]Ac的黏度,但[Bmim][FeCl4]的黏度远低于对应的[Bmim]Cl的黏度。金属络合阴离子型离子液体[Bmim][AXn+1]吸收CO2的能力显著提高。A series of ionic liquids with metal complex anion [-Bmim][AXn＋1] were synthesized by onestep method of mixing the same amount of imidazole ionic liquid [Bmim]X（X=C1, Ac） and inorganic salt AXn（A=Fe, Zn）. The density and viscosity of the final products are measured at different temperatures. The correlations of density and viscosity with the temperature were obtained by empirical model. The solubilities of carbon dioxide in [Bmim]X and [Bmim][AXn＋1] were measured. The results show that the density and viscosity of [Bmim] X and [Bmim] [AXn＋1] decrease with the increasing of temperature. Meanwhile, the density of ionic liquids with metal complex anion is much higher than that of the traditional ionic liquids. At the same time, the viscosities of [Bmim][ZnCl3] and [Bmim][Zn（Ac）3] are much higher than those of the conventional ILs [Bmim]X. However, the viscosity of [Bmim][FeCl4 ] is much lower than that of the [Bmim]Cl. The ionic liquids with metal complex anion exhibit excellent ability in CO2 capture.

关 键 词：离子液体 金属络合阴离子 密度 黏度 CO2捕集 

分 类 号：O645.16[理学—物理化学]