渗透汽化
膜
材料科学
纳米颗粒
化学工程
渗透
气体分离
零(语言学)
相位反转
纳米复合材料
金属有机骨架
纳米技术
咪唑酯
吸附
选择性
化学
工程类
渗透
哲学
生物化学
语言学
作者
Guanhua Liu,Zhongyi Jiang,Keteng Cao,Sankar Nair,Xuanxuan Cheng,Jing Zhao,Hassan Gomaa,Hong Wu,Fusheng Pan
标识
DOI:10.1016/j.memsci.2016.09.064
摘要
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/(m2 h) and separation factor of 1840, while the ZIF-8-filled membrane displayed permeation flux of 879 g/(m2 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.
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