两步法制备ZIF-8填充聚二甲基硅氧烷(PDMS)渗透汽化膜PDMS/ZIF-8,用以分离水中正丁醇,并对该膜的化学结构、形貌及热稳定性进行了表征.结果表明:该膜对正丁醇有很高的选择渗透性,随着ZIF-8添加量的增加,分离因子先增大后减小,而总通量单调下降.当ZIF-8添加质量分数为2％时(PDMS/ZIF-8-2膜),分离因子达到最高.另一方面,随着操作温度的上升,PDMS/ZIF-8-2膜的通量和分离因子都增大.在60℃,料液质量分数为0.96％时,PDMS/ZIF-8-2膜的分离因子及通量最高可达49.24和8.43 kg·μm/(m2·h).
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