Anionic surfactant-doped Pebax membrane with optimal free volume characteristics for efficient CO 2 separation

Blending PPO‐based molecules with Pebax MH 1657 in membranes for gas separation

“…In the majority of studies concerning additive blending in Pebax, gas transport properties were altered through reducing crystalline effects with strong permeability enhancements . In this work, the PPO‐rich additives interacted with the amorphous parts, altering gas transport properties through a higher specific volume.…”

A stable polymeric chain configuration producing high performance PEBAX-1657 membranes for CO2 separation

“…26,32 The sharp and strong bands at 1732 and 1636 cm À1 represent C]O stretching vibration in the two types of amide groups, whereas 1541 cm À1 peaks correspond to N-H deformation of the PA6 segment. 38 For the pristine PEBAX membrane, the characteristic peak at 1096 cm À1 is mainly attributed to the C-O stretching vibration of the PEO segment. As reported by Zheng and Xu, 67 Ruiz-Hitzky and Aranda, 68,69 and Papke et al, 70 the peaks at 949 and 848 cm À1 assigned to the CH 2 rocking vibration of methylene groups in a gauche conformation indicate the possible helical structure of the PEO segment in the PEBAX membrane.…”

“…The as-fabricated PEBAX membranes not only show a better polymeric structure but also have a high value of FFV in comparison to earlier reports. 16,38 3.3 Single gas permeation performance assessment 3.3.1 Gas permeability of pristine PEBAX membranes and MMMs. The single gas permeation performance of polymeric membranes and MMMs was measured by a single gas permeation test of CO 2 , N 2 , O 2 , and CH 4 .…”

“…[14][15][16][17][18][19][20][21][22][23] Poly(ether-block-amide) polymer commonly known as PEBAX is considered as one of the ideal polymeric materials for membrane-based separation of CO 2 from ue gas and natural gas because of its comparatively high gas permeability as well as CO 2 selectivity. 1,16,[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] PEBAX consists of two monomers polyethylene oxide (PEO) and polyamide (PA), where the earlier component provides exibility and high CO 2 permeability due to its high affinity with the polar CO 2 molecule, while the latter component imparts mechanical strength to the membrane. As ether oxygen moieties have a signicant affinity to acid gases, PEBAX is considered as one of the best candidates for CO 2 separation from light gases.…”

Biomethane Purification Using PVDF/Pebax 1657 Thin Film Composite Membrane

“…14 The amide segment of the elastomer was transmitted with the stretching of C=O at 1640 cm -1 . 15,16 Other peaks in the spectrum of the composite membrane at 2869-2939 cm -1 can be attributed to the asymmetric and symmetric stretching of the C-H bond. …”