Pervaporation performance comparison of hybrid membranes filled with two-dimensional ZIF-L nanosheets and zero-dimensional ZIF-8 nanoparticles

作者：Liu, Guanhua; Jiang, Zhongyi; Cao, Keteng; Nair, Sankar; Cheng, Xuanxuan; Zhao, Jing; Gomaa, Hassan; Wu, Hong; Pan, Fusheng^*

来源：Journal of Membrane Science, 2017, 523: 185-196.

DOI：10.1016/j.memsci.2016.09.064

• Two-dimensional ZIF-L
• Zero-dimensional ZIF-8
• Hybrid membrane
• Sieving effect
• Pervaporation dehydration

Two kinds of zeolitic imidazolate frameworks (two-dimensional ZIF-L nanosheets and zero-dimensional ZIF-8 nanoparticles) with the same building blocks were synthesized. Both the ZIF-L and ZIF-8 materials were incorporated into sodium alginate (SA) matrix to fabricate hybrid membranes for pervaporation dehydration of ethanol. At the filler content of 4 wt%, the ZIF-L-filled membrane displayed permeation flux of 1218 g/(m(2) h) and separation factor of 1840, while the ZIF-8-filled membrane displayed permeation flux of 879 g/(m(2) h) and separation factor of 678. The superior separation performance of the ZIF-L-filled membrane is due to the following two reasons: the ordered alignment and the regular apertures of ZIF-L rendered ordered water channels for rapid transport of water molecules; the suitable apertures of ZIF-L rendered the desirable molecular sieving effect. Furthermore, the hybrid membranes exhibited both good swelling resistance as well as thermal and mechanical stability. This is a step forward in realizing superior performance of hybrid membranes incorporating two-dimensional porous fillers for separation processes.

• 出版日期2017-2-1
• 单位天津大学