(196c) New Dimensions in Fabricating Ionic Polymers of Intrinsic Microporosity for Advanced Membrane Gas Separation
AIChE Annual Meeting
2022
2022 Annual Meeting
Innovations in Process Engineering
Ionic Liquids: Novel Separation, Catalytic reaction and Electrochemical Processes
Monday, November 14, 2022 - 3:58pm to 4:12pm
Ionic liquids (ILs) are molten salts at ambient temperature and have attracted substantial attention in membrane-mediated gas separation due to their characteristic electrostatic interaction, favorable gas affinity, and abundant structure variations. This talk focuses on the macromolecular design, synthesis, characterization, and separation performance of a novel family of ionic polymers of intrinsic microporosity (IPIM) as gas separation membranes, which have shown promising separation performance for various gas pairs [1,2]. The functionalization of polymers of intrinsic microporosity with ionic species provides additional tunability towards the microcavity architecture through the interchain electrostatic interactions and the counterions. The wealthy structural hierarchy and the versatile chemical compositions of the ionic functionalization offer unique opportunities for generating tailored âmolecular cavitiesâ in the IPIM membranes, in which hierarchically architecture is developed with microcavities favoring fast gas transport and ultra-micropores boosting gas sieving. These novel IPIM membranes will be discussed in terms of their synthesis, characterization, and gas separation properties, focusing on how to finely tune the hierarchical microcavities via introducing various ionic substituents, manipulating the degree of ionization, and varying molecular configurations in the membranes. The fundamental correlations between the microscopic structures of these new ionic polymer of intrinsic microporosity and macroscopic membrane transport properties will be presented.
References
1. Xie, Y. Jiao, Z. Cai, H. Liu, L. Gong, W. Lai, L. Shan, S. Luo*. Highly Selective Benzimidazole-Based Polyimide/Ionic Polyimide Membranes for Pure- and Mixed-Gas CO2/CH4 Separation. Separation and Purification Technology, 2022, 282, 120091.
2. Z. Cai, Y. Liu, C. Wang, W. Xie, Y. Jiao, L. Shan, P. Gao, S. Luo*. Ladder Polymers of Intrinsic Microporosity from Superacid-Catalyzed Friedel-Crafts Polymerization for Membrane Gas Separation, Journal of Membrane Science, 2022, 644, 120155.