Ester-Crosslinked Polymers of Intrinsic Microporosity Membranes with Enhanced Plasticization Resistance for Co2 Separation

Recent progress on CO2 separation membranes

“…In a separate effort to enhance the film durability, Sun et al 128 hydrolyzed PIM-1 to produce a carboxyl PIM–COOH polymer. Subsequently, they employed propylene glycol to create mono-esterified PIM and conducted thermal ester crosslinking at various temperatures and durations.…”

De‐carboxylation of cross‐linkable triptycene‐based polyimides for CO2 separation

“…The resulting cross-linked membrane displayed stable CO 2 separation performance in the absence of plasticization up to 600 psi. 43 In addition to estercross-linking, thermal cross-linking serves as an effective strategy for mitigating plasticization. Zhu et al developed novel benzyl-induced thermal cross-linked membranes under mild conditions, exhibiting excellent separation performance surpassing the 2008 CO 2 /CH 4 upper bound, and with a CO 2 plasticization pressure above 42 bar.…”

Effect of monomer moieties on the aggregate structure and gas transport properties of polyimides: Insights from experiments and simulations

“…20 The bulky units hindered the chains packing and restricted the rotational mobility of polymer backbones, thus resulting in improved gas separation properties. Incorporating functional groups like carboxylic, 21,22 hydroxyl, 23 sulfonic acid 24 and ionic groups 5 into PI chains is also an effective method to improve its gas separation performance. Introducing these functional groups restricted polymer chains mobility and tightened polymer structures due to the hydrogen bonding, charge transfer complexes (CTCs) and electrostatic interactions, which led to the increase of gas selectivity.…”