ZIF-8/PSF复合膜的制备及其CO2分离性能研究
Study on preparation of ZIF-8/PSF composite membrane and its CO2 separation performance
程娟娟 1金花 1李砚硕2
作者信息
- 1. 宁波大学材料科学与化学工程学院,宁波 315211
- 2. 宁波大学材料科学与化学工程学院,宁波 315211;浙江汇甬新材料有限公司,宁波 315211
- 折叠
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.
Abstract
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 1.5X10-8 mol/(m2·s·Pa)and the selectivity of CO2/CH4 was 39.In addition,the ZIF-8/PSF membrane exhibited satisfactory temperature and pressure resistance,and durability.
关键词
ZIF-8/PSF/复合膜/CO2分离Key words
ZIF-8/PSF/composite membranes/CO2 separation引用本文复制引用
基金项目
国家自然科学基金(22178182)
国家自然科学基金(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)
出版年
2024
NETL
NSTL
万方数据