Recent advances of the interfacial polymerization process in gas separation membranes fabrication

Thin Film Composite Membrane Comprising Ionic Liquid/Graphene Oxide in the Selective Layer for Enhanced CO2 Separation

“…The d -spacing between the layers of N-GO nanosheets in the form of sieving channels in the PA layer of the TFN membrane provides smooth surfaces that facilitate the diffusion of penetrating gas molecules. ,, Since CO 2 possesses a smaller molecular diameter than those of N 2 and CH 4 molecules, the former gas can use these channels for faster diffusion across the membrane. In addition, the random orientation of N-GO nanosheets in the PA-layer creates tortuous paths, increasing the diffusion length of gas molecules.…”

Advancements in defect engineering of two-dimensional nanomaterial-based membranes for enhanced gas separation

“…Transferring 2D defective nanomaterials onto substrates with uniform pore arrays can optimize the total membrane area and minimize the risk of rupture. 6,8,58 This process, though, might slightly reduce the gas permeability of the membranes due to the added interlayer resistance and the presence of a supporting layer. Interlayer resistance, an impermeable interface between two layers, restricts gas molecule penetration.…”

“…It is theoretically poised to significantly diminish energy expenditure in separation processes and is anticipated to supplant traditional energy-intensive separation techniques. 8,9 Consequently, membrane separation technology is increasingly recognized as one of the most promising and futuristic separation methodologies. The crux of advancing this technology hinges on the development of novel membrane materials with enhanced permeability and selectivity.…”

Unveiling the Potential of Pt Nanoparticle-Decorated PEDOT:PSS Membranes for Efficient Gas Separation

“…Among various membrane materials, polymer provides the advantages of flexibility and cost-effectiveness . Until now, a variety of polymer materials have been employed to fabricate the membranes for gas separation, for example, polycarbonate, polysulfone, polyimides, etc., but the trade-off relationship associated with the membrane processes is still a matter of concern. , Alternatively, the addition of porous/nonporous, organic/inorganic filler material such as zeolites, graphene, and metal–organic frameworks possess the potential to enhance the separation characteristics either by providing suitable transportation channels or size-exclusive separation. − However, the agglomeration and phase segregation resulting from poor solubility and incompatibility of the materials degrade the mechanical stability of the membranes, causing difficulties in large-scale processing due to high levels of defects and brittleness in the membranes. To solve the paradox between membrane processability and separation performance, certain membrane materials, such as polymers of intrinsic microporosity, thermally rearranged polymers, and other microporous polymers, were employed, but the problems associated with them like inferior aging resistance, plasticization, etc., hinders their applicability across a wider spectrum of large-scale usage. , Further advanced polymer materials such as block copolymer were used to effectively sieve the gas molecules with good selectivity but the cost associated with them is a major concern .…”