Preparation and Pervaporation Performance of the PIMs Membranes for Purification of Ethylene Glycol

乙二醇是一种重要的化工原料，被广泛作为一种难挥发型防冻剂和冷却介质使用，也常用于多聚物的合成过程，在许多领域扮演重要的角色且需求量也在逐年增大。目前，乙二醇的工业生产方式主要有两种：一是乙烯直接氧化为环氧乙烷，然后环氧乙烷水解得到乙二醇；二是通过合成气直接制备乙二醇。这两种方法会分别产生副产物水和甲醇。因此，从乙二醇溶液中分离水或者甲醇得到以获得高纯度乙二醇产品就变得十分必要。渗透汽化膜过程作为一种低能耗、分离效率高、过程简单的新型膜分离技术，为乙二醇纯化提供了新的方法。渗透汽化膜过程中最关键的是高性能膜材料。 本文致力于开发高效乙二醇纯化的膜材料，合成了自具微孔高分子（PIM−...Ethylene glycol is an important chemical material, which is widely used as a nonvolatile antifreeze, coolant agent and also as an intermediate for producing different polymers like polyethylene glycol and polyester, and has become more crucial with increasing demand in various fields. Currently, ethylene glycol is mainly produced from two commercial routes: (i) direct ocidation of ethylene to ethy...学位：工学硕士院系专业：化学化工学院_化学工程学号：2062013115145

Advances in Structure Controls and Modifications of PIMs Membranes for Gas Separation

自具微孔高分子(POlyMErS Of InTrInSIC MICrOPOrOSITy,PIMS)是近年来出现的一种新型有机微孔材料,由含有扭曲结构的刚性单体聚合而成,具有比表面积高、化学和物理性质稳定、微孔结构可控等优点,在均相催化、氢气储存等方面表现出巨大的应用潜力。因其优越的气体分离性能,PIMS气体分离膜更是吸引了众多研究者的关注,发展迅速。本文总结了PIMS的分类及其在气体分离膜中的应用,重点介绍了PIMS气体分离膜的结构调控与改性方面的研究进展,分析了PIMS的分子结构与气体分离性能间的内在关联,最后提出了目前研究中存在的一些问题并对其发展做出了简要的评述。Polymers of intrinsic microporosity( PIMs),as novel microporous organic polymers polymerized by rigid monomers that have sites of contortion,have great application potential in homogeneous catalysis and hydrogen storage due to their high specific surface,chemical and physical stability and pore size controllability.Particularly,PIMs composed of polymer chains attract more attention in gas separation membranes due to their superior gas separation properties and good solubility.Here,the classification and applications of PIMs as well as the properties including stability,gas permeability and gas selectivity of PIMs gas membrane are introduced.The structure controls and modifications of PIMs gas membrane and the relationship between molecular structures and gas separation properties are described in detail.Finally,the problems existed in the present research are pointed out and a brief comment on the development is given.国家自然科学基金项目(No.21306155); 高等学校博士点专项科研基金(No.20120121120013); 中央高校科研业务费项目(No.2012121029)资助~