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

Abstract

The cover image is based on the Original Research Article Pebax/MWCNTs-NH 2 mixed matrix membranes for enhanced CO 2 /N 2 separation by Chunfeng Song et al., https://doi.

A Review of the Recent Progress in the Development of Nanocomposites Based on Poly(ether-block-amide) Copolymers as Membranes for CO2 Separation

“…Multi-walled carbon nanotubes (MWCNTs) were functionalized (MWCNTs-NH 2 ) and loaded in Pebax to analyze the key role of the solvent and the temperature of preparation on the filler dispersion [ 37 ]. Sedimentation of CNTs was observed in the MMMs prepared with solvents with low molar volume (ethanol/water mixture) that required a long evaporation time, while NMP, a solvent with high molar volume, gelled quickly as the solution cooled down, hindering the mobility of CNTs, and thus, guaranteeing significantly higher transport properties for CO 2 /N 2 separation.…”

Building CO2 Transport Channels in Mixed Matrix Membranes Using SiO2 Nanosheets

“…Numerous types of nanofillers, including silica (SiO 2 ), zeolites, graphene oxide, carbon nanotubes, vermiculite, metal–organic frameworks, and zeolitic imidazole frameworks, have been employed to improve the characteristics of polymer films. − SiO 2 nanoparticles can be used for the preparation of MMMs because they are thermally and mechanically stable, exhibit hydrophilicity, and have a proper specific surface area and multiple hydroxyl groups.…”

Mixed Dimensional Nanostructure (UiO‐66‐Decorated MWCNT) as a Nanofiller in Mixed‐Matrix Membranes for Enhanced CO2/CH4 Separation

“…However, CNTs undergo inhomogeneous dispersion and entangled agglomeration in the polymer matrix due to presence of the van der Waals forces [27] . Surface functionalization of the MWCNTs by introducing hydrophilic functional groups via chemical agents is a strategic approach for uniform dispersion of nanotubes in the polymer matrix as it generates diffusivity tunnels in membranes which could lead to enhanced permeability of gases [28] . MOFs have been identified as another potential and promising nanofillers for gas separation and storage applications due to their extremely diverse morphology, adjustable pore shapes/sizes, and rich selection of functionality [29–32] .…”

“…[27] Surface functionalization of the MWCNTs by introducing hydrophilic functional groups via chemical agents is a strategic approach for uniform dispersion of nanotubes in the polymer matrix as it generates diffusivity tunnels in membranes which could lead to enhanced permeability of gases. [28] MOFs have been identified as another potential and promising nanofillers for gas separation and storage applications due to their extremely diverse morphology, adjustable pore shapes/sizes, and rich selection of functionality. [29][30][31][32] In particular, zirconium-based UiO-66 is an exceptional candidate for membrane gas separation due to its strong affinity towards CO 2 molecules arising from À OH groups connected to the zirconium cluster.…”