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Statements

Subject Item
dbr:Thin-film_composite_membrane
rdf:type
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rdfs:label
Thin-film composite membrane
rdfs:comment
Thin-film composite membranes (TFC or TFM) are semipermeable membranes manufactured principally for use in water purification or water desalination systems. They also have use in chemical applications such as batteries and fuel cells. A TFC membrane can be considered as a molecular sieve constructed in the form of a film from two or more layered materials.
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dbr:University_of_California,_Los_Angeles dbr:Water_purification dbc:Membrane_technology dbr:Maxwell–Stefan_diffusion dbr:Molecular_sieve dbr:Semipermeable_membrane dbc:Water_technology dbr:Water_desalination dbr:Nanofiltration dbr:Reverse_Osmosis dbr:Polysulfone dbr:Salt_(chemistry) dbr:Non-woven dbr:DuPont dbr:Polyethersulfone dbr:FilmTec_Corporation dbc:Filters dbr:Reverse_osmosis dbr:Fuel_cell dbr:Molecule dbr:Zeolites dbr:Buffer_solution dbr:Battery_(electricity) dbr:Polyamide
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dbo:abstract
Thin-film composite membranes (TFC or TFM) are semipermeable membranes manufactured principally for use in water purification or water desalination systems. They also have use in chemical applications such as batteries and fuel cells. A TFC membrane can be considered as a molecular sieve constructed in the form of a film from two or more layered materials. TFC membranes are commonly classified as nanofiltration (NF) and reverse osmosis (RO) membranes. Both types are typically made out of a thin polyamide layer (<200 nm) deposited on top of a polyethersulfone or polysulfone porous layer (about 50 microns) on top of a non-woven fabric support sheet. The three layer configuration gives the desired properties of high rejection of undesired materials (like salts), high filtration rate, and good mechanical strength. The polyamide top layer is responsible for the high rejection and is chosen primarily for its permeability to water and relative impermeability to various dissolved impurities including salt ions and other small, unfilterable molecules.
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dbr:Membranes
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