A series of bisimidazolium-PEG mediated crosslinked polyimides with different PEG chain length have been prepared for gas separation membranes. The bisimidazolium-PEG was used both as crosslinkers and CO2-solubilizing groups. The crosslinked 6FDA-durene polyimide membranes prepared displayed excellent chemical, mechanical and thermal stabilities. Furthermore, high CO2/N2 and CO2/CH4 selectivity was obtained while keeping relatively high permeability. The preparation and the effect of the PEG chain length within the bisimidazolium-PEG groups on the structures and physicochemical properties of the polymers, as well as the gas separation properties of the corresponding membranes will be discussed.

• 호세인 이쿠발(인천대학교 화학과 유기재료합성실험실, Organic Material Synthesis Laboratory, Department of Chemistry, Incheon National University) | Iqubal Hossain
• 김태현(인천대학교 화학과 유기재료합성실험실, Organic Material Synthesis Laboratory, Department of Chemistry, Incheon National University) | Tae-Hyun Kim