氨基酸季铵离子液体水溶液的密度和黏度  

The density and viscosity of aqueous solutions of quaternary ammonium-amino acid ionic liquids

作　　者：王薪薪 唐少峰[5] 吕兴梅 周清[1,2,3,4] 李谦 张锁江[1,2,3,4] 

机构地区：[1]离子液体清洁过程北京市重点实验室 [2]绿色过程与工程重点实验室 [3]多相复杂系统国家重点实验室 [4]中国科学院过程工程研究所,北京100190 [5]河南大学化学化工学院,开封475001

出　　处：《中国科学：化学》2014年第6期1050-1057,共8页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金国际合作与交流项目(21210006);国家高技术研究发展计划(2012AA063001);北京市自然科学基金(2131005,2132055)资助

摘　　要：选用L-a-丙氨酸、L-丝氨酸和L-天冬氨酸作为目标离子液体的阴离子来源，通过目标阳离子碱盐和目标氨基酸中和反应得到了3种季铵-氨基酸类离子液体四乙铵-丙氨酸盐（[N2222][Ala]）、四乙铵-丝氨酸盐（[N2222][Ser]）和四乙铵-天冬氨酸盐（[N2222][Asp]），并对其结构进行了表征. 测定了离子液体[N2222][Ala]、[N2222][Ser]以及[N2222][Asp]水溶液在不同温度下的密度和黏度，计算了超额体积及黏度偏差，并对超额体积和黏度偏差进行了关联. 分析了离子液体与溶剂之间的作用形式和离子液体与水之间形成的氢键对溶液密度和黏度的影响.Three quaternary ammonium-amino acid ionic liquids （[N2222][AA]） tetraethylammonium L-a-aminopro- pionic acid salt （[N2222][Ala]）, tetraethylammonium L-amino-3-hydroxypropionic acid salt （[N2222][Ser]）, and tetraethylammonium L-aminosuccinic acid salt （[N2222][Asp]） were prepared by the neutralization method and characterized by 1H NMR, 13C NMR, IR and elemental analysis. The density and viscosity of binary mixtures （[N2222][AA] ＋ water） with different compositions were determined at T = 293.15-343.15 K by using an Anton Paar DMA 5000 densimeter and an Anton Paar AMVn measuring assembly systematically. The temperature dependence of density and viscosity for [N2222][AA] and water mixtures can be described by an empirical linear equation and by the Vogel-Tammann-Fucher （VTF） equation, respectively. The excess volume （V E） and viscosity deviation （Δη） were calculated and correlated by Redlich-Kister polynomial equation, respectively. Based on the measured and derived properties, the influence of the interaction between ILs and water and hydrogen bonds formed between amino acid ionic liquids （AAILs） and water on density and viscosity were analyzed.

关 键 词：氨基酸离子液体 离子液体水溶液 密度 黏度 

分 类 号：O645.1[理学—物理化学]