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ZIF-8/PSF复合膜的制备及其CO2分离性能研究

作者：程娟娟，金花，李砚硕

单位： 1.宁波大学，材料科学与化学工程学院，宁波315211；2.浙江汇甬新材料有限公司，宁波315211

关键词： ZIF-8；聚砜；复合膜；CO2分离

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2024,44(3):10-20

摘要：

由无机填料和有机基质组成的混合基质膜（MMMs）被广泛认为在CO2分离中发挥着重要作用。本研究开发了一种逐层复合工艺，即通过浸涂-热转换制备与载体结合强度高的ZIF-8薄膜层，而后涂覆PSF聚合物溶液使其与ZIF-8膜层紧密结合得到ZIF-8/PSF混合基质复合膜。ZIF-8/PSF复合膜展现出CO2优先渗透性能，对于等摩尔CO2/CH4混合气分离，CO2渗透率为1.5×10-8 mol/(m2·s·Pa)，CO2/CH4的选择性为39。此外，ZIF-8/PSF复合膜具有优异的耐温性、耐压性、以及长周期稳定性。

Mixed matrix membranes (MMMs), composed of inorganic fillers and organic substrates, are widely believed to play an important role in CO2 separation. In this study, a layer-by-layer composite technology was developed, that is, the ZIF-8 layer with high adhesive strength to the porous support was prepared by the dip coating and thermal conversion method, and then the ZIF-8/PSF mixed matrix composite membrane was achieved by coating PSF polymer solution on the ZIF-8 layer. Due to the excellent interfacial bonding strength between the membrane matrix and the coating layer, the ZIF-8/PSF composite membrane showed CO2-preferred permeability. For equimolar CO2/CH4 mixture separation, the CO2 permeance was 1.5×10-8mol m-2 s-1 Pa-1 and the selectivity of CO2/CH4 was 39. In addition, the ZIF-8/PSF membrane exhibited satisfactory temperature and pressure resistance, and durability.

基金项目：

国家自然科学基金（22178182，22178183）；宁波市科技创新2025重大专项（2022Z154）；浙江省省属高校基本科研业务费（SJLZ2023004）

作者简介：

程娟娟（1997-），女，重庆彭水人，硕士研究生，从事复合膜的制备及其气体分离性能研究

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