功能化离子液体－聚合物渗透汽化复合膜的制备及其分离性能的基础研究

项目名称： 功能化离子液体－聚合物渗透汽化复合膜的制备及其分离性能的基础研究

项目编号： No.20866007

项目类型： 地区科学基金项目

立项/批准年度： 2009

项目学科： 化学工业

项目作者： 董永全

作者单位： 南昌航空大学

项目金额： 19万元

中文摘要： 本工作以乙酸乙酯/水、苯/环己烷和异丙醇(乙醇)/水为分离对象，分别制备了聚合物包埋离子液体杂化膜，聚合物/聚离子液体IPN膜，支撑离子液体/聚合物膜和几种典型渗透汽化膜，考察了制备条件对膜结构和分离性能的影响，具体如下：Ⅰ采用溶液浇铸法制得聚合物包埋离子液体杂化膜；选用含乙烯基的离子液体单体在聚合物链间发生自由基聚合反应制得聚合物/聚离子液体IPN膜。离子液体、聚离子液体的引入，提高了聚合物膜的分离性能，膜表现出优异的热稳定性和操作稳定性。Ⅱ选用Al2O3膜固定离子液体后涂覆聚合物膜的方法，制得性能稳定的支撑离子液体/聚合物膜，这种膜对苯/环己烷的选择性得到大大提高。Ⅲ制备了交联丙烯酸酯橡胶、乙烯-乙烯醇共聚物、丙烯酸酯-三乙氧基硅烷共聚物膜，这些膜表现出很好的乙酸乙酯选择性，透水性和透醇性。Ⅳ用银盐和离子液体制得离子液体-Ag+复合载体，采用物理填充法制得聚合物/离子液体－Ag+促进传递膜，这种膜的分离性能优于Ag盐促进传递膜。除此之外，还制备了含Co，环糊精的离子液体。含Co的离子液体在空气中不稳定，不适合作促进传递膜的载体。环糊精的离子液体的促进传递效果还有待进一研究。

中文关键词： 聚合物膜;离子液体;支撑离子液体;渗透汽化膜;促进传递

英文摘要： In this work, polymer inclusion ionic liquids (ILs) hybrid membrane, polymer/poly ionic liquids interpenetrating polymer network (IPN) membrane, supported ILs/polymer membrane and several typical polymer pervaporation membranes were prepared for separation of ethyl acetate /water, benzene/cyclohexane, isopropanol or ethanol/water mixture, respectively. The effects of preparation conditions on membrane structure and operating conditions on separation property were investigated. ⅠPolymer inclusion ILs hybrid membranes were prepared by the solution casting method. And polymer/poly ionic liquids IPN membranes were prepared by radical polymerization of vinyl functional ionic liquids monomer in polymer solution. The two membranes showed good separation performance, thermal stability and operating stability.Ⅱ Supported ionic liquids/polymer membranes were prepared by immobilized two different ILs in the alumina membrane, which was coated with a polymer membrane to prevent the leakage of ILs. The selectivity to benzene/cyclohexane was improved greatly. ⅢCrosslinked acrylate rubber, poly (ethylene-co-vinyl alcohol) and acrylate-vinyl triethoxysilane copolymer membrane were prepared, respectively. These membranes showed good EtAc recovery property from water, dehydration properties of isopropanol and permselectivity of ethanol. Ⅳ ILs-Ag+ composite carriers were prepared by reaction of the ionic liquids with silver salt. Polymer/ILs-Ag+ composite carrier facilitated transport membranes were prepared by method of physical filling and separation performance of these membranes were investigated. The membranes showed good separation performance than facilitated transport membrane embedding silver salt. In addition, a cobaltiferous functional ILs and functional ILs containing cyclodextrin were synthesized. The result showed that cobaltiferous functional ILs was instability in air, so it is not proper to use as carrier of facilitated transport. The ILs of cyclodextrin is solid, its effect of carrier require further in-depth studies.

英文关键词： polymer membrane;ionic liquids;supported ionic liquids;pervaporation;facilitrated transport