【摘要】 合成了聚乙烯醇－ｇ－聚丙烯酸接枝聚合物（ＰＶＡ－ｇ－ＰＡＡ），分别用ＫＯＨ、ＮａＯＨ、ＬｉＣｌ的乙醇－水溶液处理ＰＶＡ－ｇ－ＰＡＡ膜。发现离子膜用于乙醇－水的渗透气化分离可以大幅度提高分离系数，特别是用ＫＯＨ处理，分离系数可达４００。更多还原

【Abstract】 Poly(vinyl alcohol)-g-poly(acrylic acid) graft polymers (PVA-g-PAA) were synthesized by eerie ion-initiated graft polymerization of acrylic acid onto poly (vinyl alcoh ol). The thermally crosslinked PVA-g-PAA membranes were treated with KOH.NaOH and LiCl solution in ethanol/ water, respectively. It has been found that the ion-modified PVA-g-PAA membranes exhibit much greater separation factor for the pervaporation of water-ethanol azeotropic mixture. The separation factor of a K+-modified membrane is over 400.更多还原