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氨基改性ZIF-8及聚酰亚胺混合基质膜的制备

作者：李洪峰，周香

单位：国电环境保护研究院有限公司

关键词：聚酰亚胺；气体分离膜； ZIF-8；混合基质膜；氨基改性

DOI号： 10.16159/j.cnki.issn1007-8924.2024.06.005

分类号： TQ028.8

出版年,卷(期):页码： 2024,44(6):37-44

摘要：

采用滴涂法，将自制氨基化的金属有机骨架材料（MOF)、ZIF-8-NH2与共聚聚酰亚胺（PI，m6FDA-DAM∶mDABA=3∶2）混合，制备聚酰亚胺混合基质膜.通过研究混合基质膜的微观结构、红外、气体分离性能等，考察ZIF-8-NH2掺杂含量对MOF/PI混合基质膜结构和性能的影响.结果表明：自制的ZIF-8-NH2材料的粒径约为70 nm，与PI混合均匀.当ZIF-8-NH2质量分数达到15 %时，混合基质膜的气体分离性能最佳，CO2渗透系数为206.91 Barrer，在保持较高气体渗透通量的同时其选择性达到66.39，CO2/CH4分离性能超过2008年Robeson 上限.

In this paper, the polyimide mixed matrix membrane was prepared by mixing the homemade aminated ZIF-8-NH2 particles with co-polyimide [PI, 6FDA-DAM/DABA (3∶2)] using a drop-coating method. The effects of ZIF-8-NH2 doping content on the structure and properties of MOF/PI mixed matrix membranes were investigated by studying the results of microstructure, infrared, and gas separation performance properties of the mixed matrix membranes. The results showed that the homemade ZIF-8-NH2 material had a particle size of about 70 nm and was mixed with polyimide (PI) uniformly. When the mass concentration of ZIF-8-NH2 reached 15%, the mixed matrix membrane had the best performance in separation, with a CO2 permeation coefficient of 206.91 Barrer, and its selectivity reached 66.39 while maintaining a high gas permeation flux, and the separation performance to CO2/CH4 system exceeded the Robeson 2008 upper limit.

基金项目：

基于电吸附浓缩+高低温烟气耦合干燥脱硫废水零排放技术研究项目（HB2023Y02）

作者简介：

李洪峰（1979-），男，黑龙江哈尔滨人，大学本科，主要研究方向为水处理、腐蚀与防护，E-mail:12106739@ceic.com

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