ZIF-8填充聚硅氧烷膜的制备及渗透汽化分离水中正丁醇  

ZIF-8 filled polydimethylsiloxane membranes for pervaporative separation n-butanol from aqueous solution

作　　者：张春芳[1] 董亮亮[1] 白云翔[1] 顾瑾[1] 孙余凭[1] 

机构地区：[1]江南大学食品胶体与生物技术教育部重点实验室,化学与材料工程学院,无锡214122

出　　处：《膜科学与技术》2013年第4期88-93,共6页Membrane Science and Technology

基　　金：国家自然科学青年基金项目(21106053);中央高校基本科研业务费专项资金(JUSRP311A01)资助

摘　　要：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8.43kg·μm/(m2·h).ZIF-8 filled polydimethylsiloxane （PDMS） membranes, PDMS/ZIF-8, was prepared by a two- step polymerization process, which was used as membrane material to recover n-butanol from aqueous solution by pervaporation （PV）. The membranes demonstrated high n-butanol permselectivity. With the increase of ZIF-8 loading, the separation factor increased initially and then decreased, while the total flux decreased. The PDMS/ZIF-8 membranes containing mass fraction 2% ZIF-8 and PDMS/ZIF-8-2, showed the highest separation factor. On the other hand, the separation factor and total flux of PDMS/ZIF-8-2 membrane increased with the increase of temperature. The separation factor and total flux reached 49. 24 and 8. 43 kg ·μm/（m2·h）, respectively, at 60℃ when the feed concentration of n-butanol is 0. 96%.

关 键 词：聚二甲基硅氧烷膜 ZIF-8 渗透汽化 正丁醇 生物燃料 

分 类 号：TQ028.8[化学工程]