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ADVANCED OXIDATION METHOD FOR PRODUCING HIGH-DENSITY OXIDIZED POLYACRYLONITRILE FIBERS

United States Patent Application

20120322332
A1
View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
Method for producing an oxidized PAN fiber (OPF) wherein a PAN fiber is subjected to an oxidation process in which reactive oxidizing species are maintained in close enough proximity to the PAN fiber during the oxidation process such that a core of the PAN fiber is converted to a crosslinked thermoset morphology before an oxidized shell of the PAN fiber becomes thick enough to substantially inhibit penetration of the reactive oxidizing species into the core. The resulting OPF possesses a density greater than 1.35 g/cm.sup.3 and a substantially homogeneous crosslinked thermoset morphology along a radial dimension of the oxidized PAN fiber. Flame-retarded materials containing the resulting OPF, as well as methods for producing such flame-retarded materials, are also described.
Paulauskas, Felix Leonard (Knoxville, TN), Naskar, Amit Kumar (Knoxville, TN), Bonds, Truman Andrew (Knoxville, TN)
UT-BATTELLE, LLC (Oakridge TN)
13/ 163,134
June 17, 2011
[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.