离子液体支撑液膜分离过程传质与膜稳定性  

MASS TRANSFER AND STABILITY IN THE SEPARATION PROCESS BY SUPPORTED IONIC LIQUID MEMBRANES

作　　者：薛娟琴[1] 杨婷[1] 李国平[1] 刘妮娜[1] XUE Juanqin;YANG Ting;LI Guoping;LIU Nina(School of Metallurgical Engineering,XVan University of Architecture and Technology Xi'an 710055,China)

机构地区：[1]西安建筑科技大学冶金工程学院

出　　处：《离子交换与吸附》2019年第3期242-250,共9页Ion Exchange and Adsorption

基　　金：国家自然科学基金(51478379);陕西省教育厅专项科研计划项目(16JK1452)

摘　　要：鉴于对离子液体支撑液膜(SILMs)分离过程传质与膜稳定性的研究仍不够成熟,本文以疏水性离子液体1-丁基-3-甲基咪唑六氟磷酸盐([Bmim]PF6)为膜载体,以聚偏氟乙烯微孔滤膜(PVDF)为支撑体,采用常温浸渍法制备"填充型"离子液体支撑液膜(SILMs)。通过p H值测量法和称重法对所制备的SILMs的稳定性进行了探究,两种测量方法所得到的结果基本一致。结果表明,膜液相的HLB值和载体浓度越高,膜溶剂的粘度越大,水相中的盐浓度越低,膜液越容易流失,并且膜液可能是以乳化液滴的形式流失于水相中的。Abstact:Supported ionic liquid membranes(SILM)were prepared by immersing the polyvinylidene fluoride(PVDF)microporous membrane into the hydrophobic ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate([Bmim]^+PF6^-).The stability of the SILM was evaluated by pH measurement and gravimetric method with good consistence.The effects have been investigated for the loss of the supported ionic liquids from the membranes to the aqueous phase according to the aspects,such as the hydrophile-lipophile balance(HLB)number of surfactant,the viscosity of the solvent,the concentration of salt in aqueous phase and the carrier concentration of membrane liquid phase.The supported ionic liquids may be released from the membrane to aqueous phase via formation of the emulsified nanoparticles.

关 键 词：离子液体 支撑液膜 传质 稳定性 

分 类 号：O658.68[理学—分析化学]