Perfluorinated sulfonic acid polymer membrane having porous surface layer and method for preparing the same
US9522427B2 · kind B2 · utility
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2Claims
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Key dates
| Filing date | Mar 12, 2013 |
| Grant date | Dec 20, 2016 |
| Priority date | — |
| Expiry date | Mar 12, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249991
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Provided are a perfluorinated sulfonic acid polymer membrane having a porous surface layer, which includes a surface layer and a bottom layer present at the bottom of the surface layer, wherein the surface layer is a porous layer, and the bottom layer is non-porous dense layer, and a method for preparing the same through a solvent evaporation process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.