Diffusion transfer functionalized membrane
US11731084B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2019 |
| Grant date | Aug 22, 2023 |
| Priority date | — |
| Expiry date | Oct 25, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of making a filter, the resulting filter, and a method of using the filter to filter proteins from solution are described. The method includes contacting a porous, polymeric substrate with a transfer liquid comprising a solvent(s) and a charged polymeric solute. The transfer liquid and the polymeric substrate have a Hansen Solubility Parameter (“HSP”) distance of from about 10 to about 35. Contacting the polymeric substrate with the transfer solution causes the polymeric substrate to accept the charged polymeric solute by diffusion transfer, thereby yielding a functionalized filter medium. Removal of the transfer liquid from the polymeric substrate traps the charged polymeric solute on the surface of the polymeric substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.