A comprehensive overview of dual-layer composite membrane for air (O₂/N₂) separation

The separation of air (O 2 /N ) via a polymeric membrane has recently piqued the interest academic researcher as well industrial sector. Because its remarkable characteristics, emerged one innovative and fast growing technology. However, two major problems faced by technology, which hinder growth in commercial sector are, 1): trade-off between permeability selectivity. 2): Maintaining physical chemical structural stability long-term scale process. Recent advancements material, structural, process design have enabled development dual-layer composite (DLC) membranes. This concept combines benefits both thinner mixed matrix membranes (MMMs) based active layer porous support substrate. Due to these properties, exhibits higher perm-selectivity with enhanced mechanical strength compared single membrane. review article mainly focused on developmental progress DLC throughout years. In details, selection criteria, fabrication methodologies, application [e.g., separation] were critically reviewed. addition, challenges arising production future prospects for also thoroughly discussed this literature. creates paradigm research process, can be utilized medical sectors. [Formula: see text]