采用氮丙啶与丙烯酸钠进行室温高效反应制备交联渗透蒸发膜。利用FT-IR、XRD、正电子湮灭光谱仪、SEM、接触角测量仪、热重分析仪、机械拉伸等手段对样品物化性质进行表征,并探讨不同交联度对乙醇和水渗透蒸发性能的影响。结果表明,交联过后膜的抗溶胀性、耐热性及机械性能均明显提高。对其在70℃下的分离特性进行了测定,其渗透通量为1 389 g/(m²·h),分离因子为624,较纯膜分离因子提高2.05倍。

A crosslinked pervaporation membrane is prepared through efficient reaction between aziridine and sodium acrylate at room temperature.Its physical and chemical properties are characterized by means of FT-IR,XRD,positron annihilation,SEM,water contact angle,TGA,mechanical stretching and other methods.The effect of crosslinking degree on the pervaporation of ethanol and water is studied.The results show that the expansion resistance,heat resistance and mechanical properties of the membrane are improved due to crosslinking.The permeability flux of the membrane is 1 389 g·m^-2·h^-1 and the separation factor is 624 when the operation temperature is 70℃and water concentration in feed is 10 wt.%.The separation factor is 2.05 times higher than that of the pure membrane.

高成云(1985-),女,博士,讲师,主要从事膜分离材料与应用研究,2016006@tyust.edu.cn