Improvement in CO2/H2 separation by fabrication of poly(ether-b-amide6)/glycerol triacetate gel membranes

A highly selective PEGBEM-g-POEM comb copolymer membrane for CO2/N2 separation

“…The observed selectivity is much higher than that of membrane prepared with commercially available Pebax (17.0) and one of the highest values reported for a polymer membrane [7][8][9][10][11][12][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. The reported recently membrane performances including the CO 2 permeability and the CO 2 /N 2 selectivity are summarized in Table 2.…”

“…Poly(oxyethylene methacrylate) (POEM) is an amorphous PEO with a lack of crystallinity but with poor mechanical properties that limit its use in gas separation membranes. In order to address these issues, microphase-separated, nanostructural copolymers such as block copolymers have been applied [21][22][23]. Among them, poly(amide-b-ethylene oxide), which is a commercial block copolymer and well-known as Pebax, has been intensively used for a gas separation membrane [24][25][26][27].…”

Recent developments in membranes for efficient hydrogen purification

“…The author claimed that the presence of PEGDA restricted the mobility of polymer chain and improved the CO 2 /gas selectivity, therefore the highest CO 2 /H 2 ideal selectivity was about 16 at 40 bar and 298 K in the case of 20 wt% PEGDA added. Glycerol triacetate (GTA) was also used as a plasticizer to tune membrane structures, the optimum CO 2 /H 2 selectivity could be more than 35 with CO 2 permeability of about 1200 barrer at 24 bar and 298 K when the content of glycerol triacetate was 60 wt% [252].…”

Efficient CO2 capture by metallo-supramolecular polymers as fillers to fabricate a polymeric blend membrane

“…At present, the membranes most commonly used in gas separation are classified into polymer-organic additive systems and polymer-inorganic additive systems. The former usually contains ethylene oxide (EO) additives which possess excellent affinity with CO 2 5 , such as PEG 6 , Triton X-100 7 , PEGDA 8 , Tween 9 and GTA 10,11 . However, these organic additives are usually low molecular weight and liquid except for high molecular weight PEG, which inevitably cause decline of mechanical strength of composite membranes with increasing additives content.…”

“…36 These structures are like scaffold and physical crosslinks in membranes to keep it uniform. 11 Moreover, no appreciable pore could be observed, indicating that defect-free dense membrane is prepared and a good compatibility between F127-Tpy-M and PEBA2533 37 To study the crystallinity of PEBA2533/F127-Tpy-M blend membranes, DSC thermograms of PEBA2533, F127 and PEBA2533/F127-Tpy-M were shown in Fig S6. The low temperature melting point, T m (PTMO), is ascribed to melting of crystals of the polyether blocks and occurs about 0-20 o C. The high temperature melting point, T m (PA), is attributed to melting of polyamide crystals and exists approximately 140-160 o C. From DSC experiment, the heat of fusion (∆Hm) and the degree of crystallization (f c ) of PEBA2533/F127-Tpy-M membranes were obtained, which were listed in Table S1. From Table S1, incorporation of F127-Tpy-M decreases crystallinity PA blocksand PEO of F127, which facilitates transport of gas in the membranes.…”