Imidazole functionalized graphene oxide/PEBAX mixed matrix membranes for efficient CO2 capture

Composite membranes of graphene oxide for CO2/CH4 separation

“…In addition, GO exhibits high thermal and mechanical stability and it is highly tunable and processable in solution . Many research studies have proved that GO can enhance CO 2 capture and separation . Li et al reported that due to the high aspect ratio (>1000) of GO, it led to an increasingly tortuous path of gas diffusion in the polymer matrix and reduced the mobility of polymer chains .…”

“…Li et al reported that due to the high aspect ratio (>1000) of GO, it led to an increasingly tortuous path of gas diffusion in the polymer matrix and reduced the mobility of polymer chains . Several previous works have incorporated GO in polyetherimide (PEI) and Pebax 1657 to improve membrane selectivity . However, the addition of GO tends to cause rigidification of the neighbouring polymer and thus has resulted in a reduction in gas permeance.…”

“…3 Many research studies have proved that GO can enhance CO 2 capture 2784 www.soci.org N Norahim et al and separation. 6,[8][9][10][11][12] Li et al reported that due to the high aspect ratio (>1000) of GO, it led to an increasingly tortuous path of gas diffusion in the polymer matrix and reduced the mobility of polymer chains. 6 Several previous works have incorporated GO in polyetherimide (PEI) and Pebax 1657 to improve membrane selectivity.…”

“…6 Several previous works have incorporated GO in polyetherimide (PEI) and Pebax 1657 to improve membrane selectivity. 6,[8][9][10][11][12] However, the addition of GO tends to cause rigidification of the neighbouring polymer and thus has resulted in a reduction in gas permeance. On the other hand, the addition of organic additives containing ethylene oxide (EO) with good CO 2 affinity has been reported to enhance CO 2 permeability in many glassy polymers.…”

Magnetic nanoFe2O3 – incorporated PEBA membranes for CO2/CH4 and CO2/N2 separation: experimental study and grand canonical Monte Carlo and molecular dynamics simulations

“…Different loadings of NPs may affect gas permeation in four ways: (a) by interrupting polymer‐chain packing related to the interaction of filler and polymer, which leads to the creation of voids (FFV) and gas‐diffusion enhancement; (b) tortuosity may be increased by filler loading, causing more rigid polymer chains, which causes lower gas diffusion; (iii) by influence from functional groups of filler causing higher solubility in magnetic MMMs, and (iv) by collapsing gas separation performance stemming from the aggregation of fillers, which leads to phase separation. However, recent investigations have proved that phase separation may accelerate the gas molecule transportation within narrow gaps . The effects of Fe 2 O 3 content on PEBA/Fe 2 O 3 magnetic MMMs and the effects of feed pressure on gas permeability are depicted in Fig.…”