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LOW TEMPERATURE STABILIZATION PROCESS FOR PRODUCTION OF CARBON FIBER HAVING STRUCTURAL ORDER

United States Patent Application

*** PATENT GRANTED ***
20160258082
9,732,445
A1
View the Complete Application at the US Patent & Trademark Office
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A method for producing a carbon fiber, the method comprising: (i) subjecting a continuous carbon fiber precursor having a polymeric matrix in which strength-enhancing particles are incorporated to a stabilization process during which the carbon fiber precursor is heated to within a temperature range ranging from the glass transition temperature to no less than 20.degree. C. below the glass transition temperature of the polymeric matrix, wherein the maximum temperature employed in the stabilization process is below 400.degree. C., for a processing time within said temperature range of at least 1 hour in the presence of oxygen and in the presence of a magnetic field of at least 1 Tesla, while said carbon fiber precursor is held under an applied axial tension; and (ii) subjecting the stabilized carbon fiber precursor, following step (i), to a carbonization process. The stabilized carbon fiber precursor, resulting carbon fiber, and articles made thereof are also described.
Rios, Orlando (Knoxville, TN), McGuire, Michael Alan (Knoxville, TN), More, Karren Leslie (Knoxville, TN), Tenhaeff, Wyatt Evan (Rochester, NY), Menchhofer, Paul A. (Clinton, TN), Paulauskas, Felix Leonard (Knoxville, TN)
14/ 640,788
March 6, 2015
[0001] This invention was made with government support under Prime Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.