Composite filtration membranes and methods of preparation thereof
US9352286B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2014 |
| Grant date | May 31, 2016 |
| Priority date | — |
| Expiry date | Dec 31, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/48
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method comprises disposing, on a porous support membrane, an aqueous mixture comprising a crosslinkable polymer comprising a poly(meth)acrylate and/or poly(meth)acrylamide backbone, thereby forming an initial film layer, wherein the crosslinkable polymer comprises a side chain nucleophilic amine group capable of interfacially reacting with a multi-functional acid halide crosslinking agent to form a crosslinked polymer; contacting the initial film layer with a mixture comprising i) the multi-functional acid halide crosslinking agent, ii) an optional accelerator, and iii) an organic solvent, the organic solvent being a non-solvent for the crosslinkable polymer; and allowing the crosslinkable polymer to interfacially react with the crosslinking agent, thereby forming a composite filtration membrane comprising an anti-fouling selective layer comprising the crosslinked polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.