The time-dependent CO2-induced plasticization behavior of glassy Matrimid® 5218 polymer membranes at supercritical conditions up to 120 bar was investigated. Glassy polyimide were conditioned with both gaseous CO2 and liquid-like sc-CO2. during permeation sorption correlated the intrinsic membrane properties fluid properties. In region concentration increased slightly over time, while in sc-CO2...

Pervaporation and gas separation performances of polymer membranes can be improved by crosslinking or addition of metal-organic frameworks (MOFs). Crosslinked copolyimide membranes show higher plasticization resistance and no significant loss in selectivity compared to non-crosslinked membranes when exposed to mixtures of CO2/CH4 or toluene/cyclohexane. Covalently crosslinked membranes reveal b...

In this work, the effectiveness of metal-organic frameworks (MOFs) with sheet-like morphologies was assessed as function MOF microporosity and MOF-matrix compatibility. Zeolitic imidazolate (ZIFs, a subclass) sheet-like/platelet were incorporated in Matrimid/PBI matrices resulting mixed matrix membranes (MMMs). The ZIFs either permeable (ZIF-301) or impermeable (ZIF-95X) for gases kinetic diame...

New hydrophobic protic ionic liquid, 2-butylaminoimidazolinium bis(trifluoromethylsulfonyl)imide (BAIM-TFSI), has been synthesized. The liquid showed good thermal stability to at least 350 °C. conductivity of BAIM-TFSI determined by electrochemical impedance method was found be 5.6 × 10−2 S/cm 140 Homogeneous composite films based on commercial polyimide (PI) Matrimid and containing 30–60 wt% w...