Two-step sulfonation process for the conversion of polymer fibers to carbon fibers
Patent
·
OSTI ID:1408915
Disclosed herein are processes for preparing carbon fibers, comprising: sulfonating a polymer fiber with a sulfonating agent that is fuming sulfuric acid, sulfuric acid, chlorosulfonic acid, or a combination thereof; treating the sulfonated polymer with a heated solvent, wherein the temperature of the heated solvent is at least 95.degree. C.; and carbonizing the resulting product by heating it to a temperature of 501-3000.degree. C. Carbon fibers prepared according to these methods are also disclosed herein.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- NFE-10-02991
- Assignee:
- Dow Global Technologies LLC (Midland, MI)
- Patent Number(s):
- 9,816,207
- Application Number:
- 14/413,454
- OSTI ID:
- 1408915
- Resource Relation:
- Patent File Date: 2013 Jul 03
- Country of Publication:
- United States
- Language:
- English
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