接枝型聚砜膜的制备及其CO2分离性能  

Synthesis and Performance of Grafted Polysulfone Membrane for CO2 Separation

作　　者：李晓翠 阮雪华[1] 侯勇[1] 焉晓明[1] 廖绪行 贺高红[1] LI Xiao-cui, RUAN Xue-hua, HOU Yong, YAN Xiao-ming, LIAO Xu-hang, HE Gao-hong ＊(State Key Laboratory of Fine Chemicals ,School of Petroleum ＆ Chemical Engineering,Datian University of Technology, Panjin 124221 ,Liaoning , Chin)

机构地区：[1]大连理工大学精细化工国家重点实验室石油与化学工程学院

出　　处：《精细化工》2018年第4期625-630,共6页Fine Chemicals

基　　金：国家自然科学基金项目(21236006,21606035);大连理工大学创新团队资助项目(DUT16TD19)~~

摘　　要：以商业化芳族聚合物聚砜（PSf）、氯甲基辛基醚（CMOE）和1-甲基咪唑为原料,通过简单可控的氯甲基化和咪唑钅翁化反应,制备接枝型聚离子液体——咪唑钅翁化聚砜（PSf-g-[MIm][Cl]）,以其为分离层制备PSf-g-[MIm][Cl]膜。通过1HNMR、SEM与TGA对膜进行了表征,并考察了咪唑钅翁化程度（DIm）、操作温度、操作压力对膜性能的影响。结果表明：该膜材料具有较好的压力稳定性,可耐受0.6 MPa的压力,并且咪唑钅翁（MIm）基团含量会极大地影响其性能,随着DIm的提高,膜内MIm基团逐渐形成连续的传递通道,CO2渗透系数和选择性显著提高。在DIm=172%、操作温度25℃、操作压力0.4 MPa及增湿条件下进行膜性能测试,CO2渗透系数达到66.4 barrer,CO2/N2选择性（渗透系数的比,下同）为118.4。Imidazolium-functionalized polysulfones（PSf-g-[MIm][Cl]）,a material for CO2 separation,were successfully synthesized by simple and controllable chloromethylation-Menshutkin two-step method using polysulfone（PSf）,chloromethyl octylether（CMOE） and 1-methylimidazole（1-MIm） as raw materials. Then,a polymerized ionic liquid membrane was prepared with PSf-g-[MIm][Cl] as the selective layer. The resulting membranes were characterized by1 HNMR,SEM and TGA. The effects of degree of imidazolium（DIm）,test temperature and pressure on the performance of the membrane were investigated. The results showed that the membrane had a better pressure stability up to 0. 6 MPa and the content of MIm was a critical factor on CO2 separation performance. As the content of MIm increased,CO2 permeability and CO2/N2 perm-selectivity improved obviously,attributing to the formation of continuous channel. PSf-g-[MIm][Cl]membrane sample of 172% DIm,25 ℃,0. 4 MPa and humid conditions,the membrane exhibited good CO2 permeability of 66. 4 barrer and CO2/N2 perm-selectivity of 118. 4.

关 键 词：聚离子液体 侧链接枝 促进传递 咪唑钅翁 CO2分离 分离技术 

分 类 号：TQ028.8[化学工程]