Perfluorosulfonic acid nanofibers
US9868804B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2016 |
| Grant date | Jan 16, 2018 |
| Priority date | — |
| Expiry date | Jul 26, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for making a device with a fibrous sheet includes a step of combining a fiber-forming resin with a carrier resin to form a resinous mixture. The fiber forming resin has a fluorinated backbone with a pendent CF2CF2—X group where X is a SO3H or SO2F. The carrier resin is a soluble polyamide. The resinous mixture is extruded to form an extruded resinous mixture. The extruded resinous mixture has fiber strands of the fiber-forming resin within the carrier resin. The extruded resinous mixture is contacted with water to separate the fiber strands of the fiber-forming resin from the carrier resin. Fiber forming strands are optionally cross-linked with ammonia and then are hydrolyzed to form ionomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.