Center for Membrane Technology, College of Environmental and Energy Engineering, Beijing University of Technology, West Dawang Road 100, 100124 Beijing (China).
Angew Chem Int Ed Engl. 2014 May 26;53(22):5578-82. doi: 10.1002/anie.201309534. Epub 2014 Apr 7.
The ability to obtain a maximum loading of inorganic nanoparticles while maintaining uniform dispersion in the polymer is the key to the fabrication of mixed-matrix membranes with high pervaporation performance in bioalcohol recovery from aqueous solution. Herein, we report the simultaneous spray self-assembly of a zeolitic imidazolate framework (ZIF)-polymer suspension and a cross-linker/catalyst solution as a method for the fabrication of a well-dispersed ZIF-8-PDMS nanohybrid membrane with an extremely high loading. The ZIF-8-PDMS membrane showed excellent biobutanol-permselective pervaporation performance. When the ZIF-8 loading was increased to 40 wt%, the total flux and separation factor could reach 4846.2 g m(-2) h(-1) and 81.6, respectively, in the recovery of n-butanol from 1.0 wt% aqueous solution (80 °C). This new method is expected to have serious implications for the preparation of defect-free mixed-matrix membranes for many applications.
在保持聚合物中均匀分散的同时获得最大无机纳米粒子负载量，是制备混合基质膜以实现从水溶液中回收生物醇的高渗透性能的关键。本文报道了沸石咪唑酯骨架（ZIF）-聚合物悬浮液和交联剂/催化剂溶液的同步喷雾自组装，作为制备具有极高负载量的高度分散 ZIF-8-PDMS 纳米杂化膜的方法。ZIF-8-PDMS 膜表现出优异的生物丁醇-选择性渗透蒸发性能。当 ZIF-8 负载量增加到 40wt%时，在 80°C 从 1.0wt%水溶液中回收正丁醇时，总通量和分离因子分别可达 4846.2 g m(-2) h(-1)和 81.6。这种新方法有望对许多应用中制备无缺陷的混合基质膜产生重要影响。
