Journal
MEMBRANES
Volume 13, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/membranes13040390
Keywords
organic chelating ligands; microstructure engineering; composite membranes; crosslinking; network modification; network formation
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This review provides a brief conceptual overview of membranes derived from organic chelating ligands. It classifies the membranes based on their matrix composition. The review emphasizes the importance of organic chelating ligands in the formation of inorganic-organic composites. It explores the different types of organic chelating ligands and their role in microstructural engineering of the membranes.
This review presents a concise conceptual overview of membranes derived from organic chelating ligands as studied in several works. The authors' approach is from the viewpoint of the classification of membranes by matrix composition. The first part presents composite matrix membranes as a key class of membranes and makes a case for the importance of organic chelating ligands in the formation of inorganic-organic composites. Organic chelating ligands, categorized into network-modifying and network-forming types, are explored in detail in the second part. Four key structural elements, of which organic chelating ligands (as organic modifiers) are one and which also include siloxane networks, transition-metal oxide networks and the polymerization/crosslinking of organic modifiers, form the building blocks of organic chelating ligand-derived inorganic-organic composites. Three and four parts explore microstructural engineering in membranes derived from network-modifying and network-forming ligands, respectively. The final part reviews robust carbon-ceramic composite membranes as important derivatives of inorganic-organic hybrid polymers for selective gas separation under hydrothermal conditions when the proper organic chelating ligand and crosslinking conditions are chosen. This review can serve as inspiration for taking advantage of the wide range of possibilities presented by organic chelating ligands.
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