异辛基乙二胺——辛酰基丙氨酸型质子化离子液体的合成及其吸收CO2的研究  

Synthesis and CO2 Absorption Study of Protic Ionic Liquid Comprising with 2-ethylhexylethylenediaminium Cation and DL-octanoylalaninato Anion

作　　者：李诗梦 刘佳鑫 陈福强 余涛 钟艳萍 马晓萍 花儿 Li Shimeng;Liu Jiaxin;Chen Fuqiang;Yu Tao;Zhong Yanping;Ma Xiaoping;Hua Er(College of Chemistry and Chemical Engineering,Yinchuan 750021;Key Laboratory of Chemical Engineering and Technology,State Ethnic Affairs Commission,North Minzu University,Yinchuan 750021,China)

机构地区：[1]北方民族大学化学与化学工程学院,宁夏银川750021 [2]国家民委化工技术基础重点实验室,宁夏银川750021

出　　处：《广东化工》2019年第22期14-16,31,共4页Guangdong Chemical Industry

基　　金：国家级高等学校大学生创新创业训练计划项目(项目编号：201811407003)

摘　　要：由异辛基乙二胺(2-Ethyl-N-hexylethylenediamine,EtHexen)与辛酰基丙氨酸(Octanoylalanine,Octala)合成了鳌合胺型酰基氨基酸类新型质子化离子液体[HEtHex][Octala]。研究了其溶解性、热稳定性(Td)、熔点(Tm)及吸收CO2的能力。[HEtHex][Octala]极易溶于水,可达90 wt.%以上,其热分解温度为173.1℃,熔点为32.6℃。配制摩尔比分别为1∶10、1∶15、1∶20及1∶25的[HEtHex][Octala]/水体系,并在30℃下,测定了其吸收CO2前后体系的pH值、密度(ρ)、粘度(η)及电导率(σ)值。结果显示:随着体系中水的摩尔比的增加,其pH值、密度、粘度值下降、电导率值增大;吸收CO2后,与吸收CO2前比较,体系的pH值和电导率降低,密度和粘度增大。The protic ionic liquid composed of 2-ethyl-N-hexylethylenediaminium([HEtHex]+)cation coupled with DL-octanoylalaninata([Octala]-)anion forming DL-[HEtHex][Octala]was nwely synthesized.Its solubility in various solvents,decomposition temperature(Td),melting point(Tm)and CO2 absorption were studied.[HEtHex][Octala]is highly miscible with water(>H2O 90 wt.%).The decomposition temperature and melting point are 173.1℃and 32.6℃,respectively.[HEtHex][Octala]/water systems with different molar ratio(1∶10、1∶15、1∶20 and 1∶25)were prepared.pH value,density(ρ),dynamic viscosity(η)and electric conductivity(σ)of[HEtHex][Octala]/water systems were studied before and after CO2 absorption.The results show that pH value,density,viscosity decrease and electric conductivity increases with increasing the water molar ratio.pH and electric conductivity decrease while density and viscosity increase after CO2 absorption.

关 键 词：氨基酸类离子液体 二氧化碳 吸收 物理化学性质 

分 类 号：O621[理学—有机化学]