Methods and systems for making carbon fibers for high temperature applications
US9695525B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2014 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Sep 30, 2034 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F2/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method for the continuous production of low thermal conductivity endless filament yarns with a compact, homogeneous structural morphology. The presently disclosed methods utilize safe and recyclable ionic liquids (IL) to produce carbon fiber precursors from cellulose. The fibers are produced by the carbonization of cellulose carbon fiber precursors. The precursor fiber filaments have an increased tear resistance with simultaneously sufficient elongation, a round or crenulated cross-section, and homogeneous fiber morphology. The filament yarns exhibit performance characteristics similar to those produced from traditional viscous rayon. The resulting fibers are especially suited for aerospace applications in composite materials used at the limits of high temperatures, for instance in structures found in rocket nozzles or atmospheric reentry heat shields on spacecraft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.