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ZIF-8填充聚硅氧烷膜的制备及渗透汽化水中分离正丁醇

作者：张春芳，董亮亮，白云翔，顾瑾，孙余凭

单位：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

关键词：聚二甲基硅氧烷膜；ZIF-8；渗透汽化；正丁醇；生物燃料

DOI号：

分类号： TQ027.3

出版年,卷(期):页码： 2013,33(4):88-93

摘要：

两步法制备了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，分离因子先增加后下降，而总通量单调下降。当ZIF-8添加量为2wt%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加。在60oC，料液浓度为0.96wt%时，PDMS/ZIF-8-2膜的分离因子及通量最高可达49.24和8.43 kg?m/(m2h)。

ZIF-8 filled polydimethylsiloxane (PDMS) membranes, PDMS/ZIF-8, were prepared by a two-step polymerization process, which were used as membrane material to recover n-butanol from aqueous solution by pervaporation (PV). The membranes demonstrated high n-butanol permselectivity and 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 2 wt% ZIF-8, 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 ?ux reached 49.24 and 8.43 kg?m/(m2h), respectively, at 60 oC when the feed concentration of n-butanol is 0.96 wt%.

基金项目：

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

作者简介：

张春芳（1977-），女，内蒙古人，博士，副教授，主要研究方向，膜分离.*通讯联系人，E-mail：baisir223@163.com

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