膜科学与技术

金属有机骨架ZIF-67膜的制备和表征

作者：尚鸿飞，鲁金明，刘毅，杨建华，张艳

单位：大连理工大学化工学院，辽宁大连 116024

关键词： ZIF-67膜；蒸汽相法；气体分离；理想选择性；

出版年,卷(期):页码： 2021,41(5):73-78

摘要：

金属有机骨架材料ZIF-67具有良好的热稳定性和化学稳定性，在气体分离领域有潜在的应用价值。本研究在大孔载体上采用蒸汽相法制备ZIF-67膜，探究溶剂、晶化温度等因素对ZIF-67膜分离性能的影响，利用X射线衍射（XRD）与扫描电子显微镜（SEM）对ZIF-67膜的形貌结构进行表征。研究结果表明，以甲醇为溶剂、2-甲基咪唑为有机配体，在160℃条件下晶化9h成功制备了致密、纯相的ZIF-67膜。单组份气体渗透实验结果表明，在25℃、0.1MPa下，ZIF-67膜对H2的渗透速率为1.0×10-7 mol/（m2·s·Pa），H2/CO2、H2/N2和H2/CH4的理想选择性分别为7.62、11.0和10.9。

Metal-organic framework ZIF-67 membrane shows great potential application in gas separation due to the good thermal stability and chemical resistant . In this paper, high performance ZIF-67 membrane was synthesized by the vapor phase method. The effects of solvent and crystallization temperature on the membrane growth were investigated. In addition, X-ray diffractometer, scanning electron microscope and other characterization methods were used to analyse the morphology and thickness of the ZIF-67 membrane. It is found that a dense and pure phase ZIF-67 membrane was obtained on the tubular macroporous alumina support using methanol as solvent at 160℃ for 9h. Single-component gas permeation experiment was carried out under the conditions of 25℃ and 0.1Mpa. The results showed that the flux of H2 was 1.0×10-7 mol/（m2·s·Pa）and the ideal selectivities of H2/CO2, H2/N2 and H2/CH4 were 7.62, 11.0 and 10.9, respectively.

尚鸿飞（1995—），男，山西忻州人，硕士研究生,研究方向为ZIFs材料的制备与应用, E–mail：shanghf262@163.com

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