Poly(amide-12-b-ethylene oxide)/glycerol triacetate blend membranes for CO2 separation

CO2‐philic polyether‐block‐amide/glycerol triacetate blend membranes: gas‐permeation performance, thermal stability, and storage stability

“…As discussed in a previous article, we demonstrated that Pebax1074/GTA membranes were homogeneous blends and showed excellent results for CO 2 separation because of their enhancements of the chain mobility and membrane CO 2 ‐philicity.…”

“…This was mainly induced by the hydrostatic compression effect, which decreased the polymer free volume . With a greater GTA content, the Pebax1074/GTA membrane had a higher free volume, which induced a more hydrostatic compression effect and resulted in a more distinct trend of decreasing P . Generally, the gas with a bigger kinetic diameter (d) was more sensitive to the change in the free volume of membrane, so the order of m should have been m (H 2 ) > m (N 2 ) > m (CH 4 ) because d (H 2 ) < d (N 2 ) < d (CH 4 ), as shown in Figure .…”

“…Thus, it will integrate the high CO 2 ‐separation performance of GTA with the thermal and mechanical stabilities of the polymer and achieve a better comprehensive capability. In view of this, Feng et al . first prepared Pebax1074 (one of the Pebax grades, containing 55% PEO)/GTA blend membranes.…”

Preparation and characterization of CO2‐selective Pebax/NaY mixed matrix membranes

“…At the same time, another peak for ether group (C─O─C) is slightly red‐shifted accompanied by the obvious decrease of peak intensity. This reveals that the intramolecular hydrogen bonds between rigid segment and flexible segment in Pebax are destroyed to some extent, so as to enhance the phase separation in the microstructure of MMMs . Besides, the peak intensity of 992 cm −1 and 445 cm −1 corresponding for the asymmetric stretching vibrations and the bending vibration of Si─Al─O in zeolite becomes sharper with increasing the zeolite content.…”

Pebax/MWCNTs‐NH2 mixed matrix membranes for enhanced CO2/N2 separation

“…The stretching vibrations of NH and COC functional groups in ether existed at 1107 and 3303 cm −1 . The CO was indicated at 1704 cm −1 while the H‐bonded HNCO and CO were located at 1637 cm −1 44,45 . The presence of hydrogen bonding refers to the compatibility of polymer and the filler, which indirectly avoids the voids formation.…”