聚醚砜/离子液体共混膜的制备及其CO_(2)/CH_(4)分离性能研究  

Preparation and CO_(2)/CH_(4) Separation Performance of Polyether Sulfone/Ionic Liquid-Polymeric Membranes

作　　者：施博文 贾宏葛 SHI Bowen;JIA Hongge(Heilongjiang Provincial Key Laboratory of Polymeric Composite Materials,College of Materials Science and Engineering,Qiqihar University,Qiqihar Heilongjiang 161006,China)

机构地区：[1]齐齐哈尔大学材料科学与工程学院,黑龙江省聚合物基复合材料重点实验室,黑龙江齐齐哈尔161006

出　　处：《辽宁化工》2025年第1期1-5,共5页Liaoning Chemical Industry

基　　金：黑龙江省自然科学基金项目(项目编号:LH2019B032);黑龙江省省属高等学校基本科研业务费科研项目(项目编号:135309503);黑龙江省重点研发计划指导类项目(项目编号:GZ20210034)。

摘　　要：合成了聚醚砜(PES)/离子液体共混的气体分离膜。选用4种烷基链长度不同的咪唑类离子液体,分别以5%、10%、15%、20%的质量分数掺入铸膜液中,通过浇筑平板法制备一系列共混膜。由于CO_(2)在咪唑类离子液体(IL)中具有高溶解度和亲和力,通过在聚合物基底中混合离子液体可以提高膜的CO_(2)气体渗透率。当离子液体为IL_(1)(1-乙基-3-甲基咪唑四氟硼酸盐),共混质量分数为20%时,PES/IL_(1)共混膜对CO_(2)/CH_(4)的分离性能最好(为49.46),为纯膜的3.86倍,PES/IL_(1)共混膜对CO_(2)的渗透性能最好(为0.445 MPa),为纯膜的1.46倍。因此,聚醚砜/离子液体共混膜在从天然气中分离CO_(2)领域具有巨大的潜力。A blended polyethersulfone (PES)/ionic liquid (IL) gas separation membrane was prepared.Four imidazolium ionic liquids with various alkyl chain lengths were added to the preparing membranes solution with mass fractions of 5%,10%,15%and 20%,respectively,to prepare a series of membranes by pouring plate method.The CO_(2) gas permeability of the synthesized membranes was increased by blending ionic liquids (IL) in a polymer matrix due to the high solubility and affinity of CO_(2) in imidazolium ionic liquids.Membrane PES/IL_(1) (1-ethyl-3-methylimidazolium Tetrafluoroborate)(mass fraction of 20%) showed a nearly 1.46 times increase in CO_(2) gas permeability (0.445 MPa) and a nearly 3.86 times increase in CO_(2)/CH_(4) separation performance (49.46) compared to pure PES membrane.Therefore,these PES/IL hybrid membranes have immense potential for CO_(2) separation from natural gas.

关 键 词：聚醚砜 离子液体 咪唑 气体分离膜 

分 类 号：TQ050.43[化学工程]