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本文采用氧化还原引发体系合成了丙烯腈与马来酸酐共聚物,首次将此共聚物制成了醇、水分离用的渗透蒸发膜,研究了不同马来酸酐含量的共聚物膜在碱中的水解规律,考察了共聚物组成,料液温度,料液浓度等条件对膜的醇、水分离性能的影响关系以及水解前、后膜性能的变化,结果表明,当共聚物中马来酸酐含量大于0.069(摩尔分数)时,水解前、后膜性能有很大的变化,分离因子,渗透通量和膜强度都普遍提高。另外,还发现该共聚物膜与其它透水性膜不同,对低乙醇含量的乙醇—水混合液不能透过。
In this paper, acrylonitrile and maleic anhydride were synthesized by the redox initiator system. The copolymer was first prepared as pervaporation membrane for alcohol and water separation. The copolymer films with different content of maleic anhydride in alkali The effects of copolymer composition, feed temperature and feed concentration on the separation of alcohol and water from the membrane and the changes of membrane properties before and after hydrolysis were investigated. The results showed that when the maleic anhydride content Above 0.069 (mole fraction), the properties of the membranes changed greatly before and after hydrolysis, and the separation factor, permeate flux and membrane strength were generally increased. In addition, it was found that the copolymer film, unlike other water-permeable films, is impermeable to ethanol-water mixtures of low ethanol content.