Nanofiber containing composite membrane structures
US11154821B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2012 |
| Grant date | Oct 26, 2021 |
| Priority date | — |
| Expiry date | Mar 30, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/0283
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composite liquid filtration platform including a composite filtration medium featuring an electrospun polymeric nanofiber layer collected on a porous membrane. When in use, the porous membrane acts as a prefilter used upstream from the polymeric nanofiber layer to remove particles from a liquid stream flowing through the composite filtration structure. The nanofiber layer, positioned downstream from the porous membrane, is used as the retentive layer for critical filtration to provide biosafety assurance, and is responsible for capturing microorganisms like bacteria, mycoplasma or viruses. The composite liquid filtration platform provided herein exhibits permeability advantages over conventional porous membranes or nanofiber mats spun on coarse non-wovens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.