Thin film nanocomposite membranes of superglassy PIM-1 and amine-functionalised 2D fillers for gas separation

Abstract

Loss of free volume over time (i.e. aging) is the main hurdle towards the commercial use of super glassy polymers for gas separation membranes. Aging takes place at a much...

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

“…In conclusion, the long-term gas separation performance of the prepared MMMs, compared to PIM-1-based membranes, 112 This journal is © The Royal Society of Chemistry 2024 demonstrated that they maintain excellent separation efficiency over extended operational periods.…”

“…8(a). 112 Scanning Electron Microscopy (SEM) images indicated that the original PIM-1 thin-membrane composite (TFC) membranes possessed a smooth, dense surface and cross-section. With the addition of amine-functionalized rHGO to the PIM-1 matrix, forming TFN-rHGO-TAPA-TFC membranes, the resulting membranes displayed impeccable surface integrity without any defects and exhibited a uniform dispersion of fillers within the polymer matrix, absent of visible agglomerates, as depicted in Fig.…”

Outstanding performance of PIM-1 membranes towards the separation of fluorinated refrigerant gases

“…The polymer synthesis procedures employed to obtain PIM-1 polymers, B2, B17 and B11, are outlined in Section S2. Modifications which produced branched PIM-1 samples have been previously reported in the literature [29][30][31][32], with the underpinning theory to produce highly branched PIM-1, such as B17 and B11, outlined in a more recent publication [33]. The polymers were purified and then characterised as described in Section S3.…”

“…These results show that the different PIM-1 structures have a significant impact on the permeation properties of the F-gas molecule. Both self-standing films and thin film composite gas separation membranes from more highly branched PIM-1 polymers tend to exhibit lower initial permeabilities than disubstituted samples, but then age at a much slower rate over time [29,30,32,37].…”

Hyper-Cross-Linked Polymers with Sulfur-Based Functionalities for the Prevention of Aging Effects in PIM-1 Mixed Matrix Membranes

“…Many porous solids have been tested as fillers, ranging from inorganic to inorganic–organic hybrids to completely organic frameworks. − Organic materials can be easy to obtain with low costs of production. One example is represented by hyper-cross-linked polymers (HCPs), , already used within mixed matrix membranes (MMMs). ,,− …”