聚丙烯酸盐与聚乙烯醇共混膜醇水混合物分离性能研究

将自制的丙烯酸、甲基丙烯酸Ｎ，Ｎ－二甲基氨基乙酯共聚物与聚乙烯醇（ＰＶＡ）共混蛊渗透汽化膜，研究了膜对混合液的吸收溶解性能和分离性能，发现共混膜优先透水，与ＰＶＡ膜相比，选择性有所下降而透过速率得到很大提高，尤其是分离９５％的乙醇水溶液仍有较大的渗透通量。选择合适的共聚单体比例及聚盐含量能得到性能较好的共混膜。当共聚单体比例为２、聚盐含量为１６．３％时，共混分离９５％乙醇水溶液分离系数约为９００，

Separation of Ethanol-Water Mixture by PervaPoration through the Blend Membrane of Poly Arcylate with PVA

The copolymers of acrylic acid and 2-(dimethylamino)ethyl methacrylate were synthesized and blended with poly vinyalcohol (PVA) for pervaporation membranes,which were crosslinked by heat and used for separating ethanol-water mixture.The results show that water is preferential solution and permselectivity in the membranes,compared with the PVA membrane,the separation factor decreases while the total flux notably inxreases,especially the flux of separating 95% (percent of weight of ethanol ) ethanol-water mixture is still greater.At appropriate ratio of monomers and content of poly arcylate,the membrane has good property.