膜科学与技术

[bmim][Tf2N]@UiO-66-NH2/聚酰亚胺混合基质膜的制备及气体分离性能

作者：刘冰，姚杰，李丹，孙浩

单位： 1. 哈尔滨工业大学环境学院，黑龙江哈尔滨150090；2. 城市水资源开发利用（北方）国家工程研究中心，黑龙江哈尔滨 150090

关键词：混合基质膜；IL@UiO-66-NH2纳米颗粒；气体分离性能

出版年,卷(期):页码： 2020,40(2):14-21

摘要：

为了改善混合基质膜中分散相与连续相间的兼容性，设计一种新型的离子液体负载金属有机骨架（IL@UiO-66-NH2）纳米材料作为填料，通过涂覆法制备聚酰亚胺基（6FDA-ODA）混合基质膜，并研究IL@UiO-66-NH2含量及进料压力对气体分离性能的影响。利用SEM、XRD和FTIR对IL@UiO-66-NH2纳米颗粒和混合基质膜进行表征。结果表明，IL@UiO-66-NH2纳米颗粒均匀分散于聚酰亚胺基质中并且没有出现非选择性孔腔。利用混合基质膜构建CO2/CH4分离系统，当混合基质膜中IL@UiO-66-NH2负载量为15 wt.%时，CO2的渗透性为26.32 Barrer，CO2/CH4的分离因子为53.91，比纯聚酰亚胺膜分别提高了46.55%和26.23%。

In order to improve the interfacial compatibility between the inorganic dispersed phase and the organic continuous phase of the mixed matrix membrane, novel IL@UiO-66-NH2 nanoparticles were designed as fillers to prepare MMMs by coating method. The effect of IL@UiO-66-NH2 content and feed pressure on the gas separation performance of the membrane was investigated. The IL@UiO-66-NH2 particle and mixed matrix membrane were characterized by SEM, XRD and FTIR. The results show that the IL@UiO-66-NH2 nanoparticles were uniformly dispersed in the polyimide matrix and no non-selective voids were formed in the MMMs. The resulting membrane was used to construct the CO2/CH4 separation system. The results show that when the loading of IL@UiO-66-NH2 in the membrane is 15 wt.%, the permeability of CO2 is 26.32 Barrer, and the separation factor of CO2/CH4 is 53.91, which is increased by 46.55% and 26.23% than that of the pure polyimide membrane.

作者简介：刘冰（1990—），女，黑龙江五常人，博士研究生，主要研究方向：环境功能膜材料的制备. 通讯作者:E-mail：yaojiejiehit@163.com

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