A study on high-performance composite membranes comprising heterogeneous polyamide layers on an electrospun substrate for ethanol dehydration

Effect of the Formation of Ultrathin Selective Layers on the Structure and Performance of Thin-Film Composite Chitosan/PAN Membranes for Pervaporation Dehydration

“…Recently, membranes created by the IP method have found application in pervaporation [ 1 , 3 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. It was shown that using IP technology for the manufacture of membranes it was possible to achieve improved transport characteristics of the membrane in pervaporation separation of a water/ethanol mixture (permeation flux up to 13.9 kg/(m 2 h) and 4491 separation factor) due to the formation of ultrathin heterogeneous polyamide selective layers [ 22 ]. The development of pervaporation membranes with IP method is a complex technological and scientific task due to the large number of parameters that need to be controlled (substrate structure, composition and method of forming the PA layer, drying and cross-linking conditions, etc.).…”

Fabrication of MgFe2O4/MoS2 Heterostructure Nanowires for Photoelectrochemical Catalysis

“…Since nanoscience and nanotechnology came into being, one-dimensional (1D) nanostructures have made great advances in the field of physics, chemistry, energy, and biochemistry, as well as the development of novel functional materials, because 1D nanostructures have special chemical and physical properties that are different from conventional materials. , Several methods have been applied to synthesize 1D functional materials, such as the hydrothermal method, template method, and electrospinning method. − By contrast, electrospinning was an uncomplicated and convenient method, which could be used to prepare the various anticipative 1D nanostructures (including nanowires, nanorods and nanotubes) . Commonly, most 1D nanostructures fabricated by electrospinning are assembled with small particles (size was from 1 to 100 nm), and that further makes them possess higher strength, diffusivity, and plasticity.…”

Development and Investigation of Hierarchically Structured Thin-Film Nanocomposite Membranes from Polyamide/Chitosan Succinate Embedded with a Metal-Organic Framework (Fe-BTC) for Pervaporation

“…Three main types of interlayers were reported in the literature: organic coatings, nanomaterials, and nanocomposite coatings, which consist of organic coatings embedded with nanomaterials [ 29 , 30 , 31 , 32 , 33 ]. Different materials for interlayer formation for TFC membranes were studied: polymers (polydopamine [ 47 , 48 ] and a mixture with polyethyleneimine [ 49 ], polyamide [ 50 ], chitosan [ 51 ], sulfonated poly (ether ether ketone) [ 52 ], polyvinyl alcohol [ 53 , 54 ], and polydimethylsiloxane), TiO 2 nanoparticles [ 21 ], graphene oxide and its derivatives [ 55 , 56 ], carbon nanotubes [ 57 , 58 ], covalent organic frameworks (COF) [ 59 , 60 , 61 ], tannic acid/Fe 3+ nanoscaffolds [ 62 ], cellulose nanocrystals [ 63 ], metal–organic frameworks (MOF) [ 64 , 65 ], polymer nanocomposites (graphene oxide/polydopamine [ 66 ], silver nanoparticles /polydopamine [ 67 ], halloysite nanotubes/polydopamine [ 68 ], and COF/polydopamine [ 69 ]), as well as complexes of the polyelectrolyte (poly (sodium 4-styrenesulfonate)) and metal ions (Fe 3 + ) [ 70 ].…”

“…According to the literature review, the studies on the effect of interlayers on the performance of TFC membranes have been focused mainly on nanofiltration and reverse osmosis membranes. Only a few works were reported on the application of an interlayer in the development of TFC membranes via IP for pervaporation: the deposition of the polydopamine interlayer on a polyethersulfone support [ 26 ], a cross-linked chitosan layer on a polyacrylionitrile support [ 51 ], a TiO 2 layer on an α-Al 2 O 3 hollow fiber support [ 51 ], a polyamide layer via IP on a nanofibrous substrate [ 50 ], and modified carbon nanotubes on a hydrolyzed polyacrylonitrile substrate [ 71 ]. In all cases, permeation flux and membrane selectivity were improved or, sometimes, selectivity was maintained at the same high level, due to the construction of an interlayer [ 26 , 50 , 51 , 71 ].…”