초록 ▼

The invention provides a novel thin film composite or coated membrane suitable for reverse osmosis, ultrafiltration and microfiltration applications, and having a porous polymeric substrate with one or more microporous layers to which a thin film or coating comprising a sulfonated polyarylether is a

The invention provides a novel thin film composite or coated membrane suitable for reverse osmosis, ultrafiltration and microfiltration applications, and having a porous polymeric substrate with one or more microporous layers to which a thin film or coating comprising a sulfonated polyarylether is attached substantively to provide an oxidatively stable, thin hydrophilic film or coating layer, and a method for manufacturing and using the same.

대표청구항 ▼

An improved oxidatively resistant membrane consisting essentially of an oxidatively resistant porous substrate to which is bonded a coating film of a sulfonated polyarylether polymer and which membrane is prepared by a process which comprises: (a) forming a solution of a sulfonated polyarylether pol

An improved oxidatively resistant membrane consisting essentially of an oxidatively resistant porous substrate to which is bonded a coating film of a sulfonated polyarylether polymer and which membrane is prepared by a process which comprises: (a) forming a solution of a sulfonated polyarylether polymer in a potentiating solvent system containing at least 10% formic acid, said solvent system being substantially polar, volatile enough to be removed by gentle heating, of low enough surface tension to wet the porous substrate, and not able to dissolve the porous substrate; (b) uniformly applying said solution of the sulfonated polyarylether to at least one surface of the porous substrate; and (c) removing said solvent from the solution to form a coating or film of the sulfonated polyarylether adherently attached to the porous substrate.