Controlled chemical stabilization of polyvinyl precursor fiber, and high strength carbon fiber produced therefrom
US9528197B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2013 |
| Grant date | Dec 27, 2016 |
| Priority date | — |
| Expiry date | Jan 26, 2035 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Method for the preparation of carbon fiber, which comprises: (i) immersing functionalized polyvinyl precursor fiber into a liquid solution having a boiling point of at least 60° C.; (ii) heating the liquid solution to a first temperature of at least 25° C. at which the functionalized precursor fiber engages in an elimination-addition equilibrium while a tension of at least 0.1 MPa is applied to the fiber; (iii) gradually raising the first temperature to a final temperature that is at least 20° C. above the first temperature and up to the boiling point of the liquid solution for sufficient time to convert the functionalized precursor fiber to a pre-carbonized fiber; and (iv) subjecting the pre-carbonized fiber produced according to step (iii) to high temperature carbonization conditions to produce the final carbon fiber. Articles and devices containing the fibers, including woven and non-woven mats or paper forms of the fibers, are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.