功能化聚合离子液体的合成及其在CO2吸附中的应用  

Synthesis of Functionalized Poly Ionic Liquid and its Application in CO_2 Adsorption

作　　者：骆静宜 孙丽伟 唐韶坤[1] LUO Jing-yi;SUN Li-wei;TANG Shao-kun(Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering &Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University;Tianjin 300354, China)

机构地区：[1]天津大学化工学院绿色合成与转化教育部重点实验室,天津化学化工协同创新中心,天津300354

出　　处：《高校化学工程学报》2018年第6期1419-1426,共8页Journal of Chemical Engineering of Chinese Universities

摘　　要：温室效应加剧使CO_2减排压力日益增加,CO_2捕集技术的研究备受关注。研究创新性合成了一种功能化聚合离子液体并将其用于CO_2吸附。首先采用微波法合成了离子液体单体1-乙烯基-3-甲氧基乙基氯化咪唑,将其聚合后进行阴离子交换,得到目标产物聚(1-乙烯基-3-甲氧基乙基咪唑甘氨酸盐)(P([VMOEim][Gly]))。利用核磁共振波谱与傅里叶变换红外光谱确定了产物结构,XRD结果表明该聚合离子液体为无定形结构,热重分析显示其起始分解温度在180~?C左右。进而将P([VMOEim][Gly])用于CO_2吸附,考察了温度、CO_2流量对吸附性能的影响,发现低温低流量有利于CO_2吸附,在25~?C、CO_2流量为10 mL·min^(-1)时,CO_2吸附容量为26 mg·g^(-1);重复使用5次CO_2吸附容量基本稳定,pseudo-second order模型能较好地描述该吸附过程。Aggravation of greenhouse effects increases the pressure on reduction of CO2emission,which makes CO2capture a research hotspot.A functionalized poly ionic liquid was synthesized for CO2adsorption in this study.Ionic liquid monomer1-vinyl-3-methoxyethyl imidazolium chloride([VMOEim][Cl])was synthesized under microwave irradiation.The monomer then went through polymerization and anion exchange to obtain the target product poly(1-vinyl-3-methoxyethyl imidazolium glycinate),P([VMOEim][Gly]).The structures of the monomer and poly ionic liquid were confirmed by NMR and FT-IR spectra.XRD analysis indicates that the poly ionic liquid is amorphous.TG analysis shows that the initial decomposition temperature of P([VMOEim][Gly])is^180℃.P([VMOEim][Gly])was applied for CO2adsorption and the effects of temperature and CO2flow rate on adsorption were investigated.The results show that low temperature and low CO2flow rate are favorable for CO2adsorption,and the maximum CO2adsorption capacity can reach up to26mg·g-1at25℃with10mL·min-1CO2flow rate.Furthermore,the poly ionic liquid shows good reusability and the CO2adsorption capacity is maintained after five-cycle adsorption-desorption experiments.The pseudosecond order model fits well with the kinetic data of CO2adsorption by P([VMOEim][Gly]).

关 键 词：聚合离子液体 功能化 二氧化碳 吸附 

分 类 号：O632.6[理学—高分子化学]