US 12,006,411 B1
Method of making carbonized composites
Richard D. Hreha, Centerville, OH (US); Kory K. Evanson, Vandalia, OH (US); Kristopher K. Aber, Dayton, OH (US); Jeffrey R. Josken, West Carrollton, OH (US); and Michael D. Rauscher, Beavercreek, OH (US)
Assigned to Systima Technologies, Inc., Mukilteo, WA (US)
Filed by Systima Technologies, Inc., Mukilteo, WA (US)
Filed on Aug. 18, 2021, as Appl. No. 17/405,454.
Claims priority of provisional application 63/067,385, filed on Aug. 19, 2020.
Int. Cl. C08J 7/12 (2006.01); C08J 5/24 (2006.01); C09K 5/14 (2006.01); F16L 59/02 (2006.01)
CPC C08J 7/123 (2013.01) [C08J 5/243 (2021.05); C09K 5/14 (2013.01); F16L 59/028 (2013.01); C08J 2363/00 (2013.01); C08J 2379/00 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of producing a fiber reinforced polymer matrix composite, the method comprising:
forming a polymerized fiber reinforced composite, the polymerized fiber reinforced composite comprising a cured thermoset polymer matrix and at least one reinforcement material,
wherein a thermoset polymer forming the cured thermoset polymer matrix comprises at least one polymer represented by chemical formula (I) or (II) or (III)

OG Complex Work Unit Chemistry
wherein:
m and n are each an integer greater than or equal to 1,
at least one of R1 or R2 comprises an aromatic moiety, and
X is selected from the group consisting of CH2, NH, O, S, SO2, and combinations thereof, and
wherein the reinforcement material is carbon fiber or ceramic fiber; and
treating at least a portion of a first face of the polymerized fiber reinforced composite with electromagnetic radiation to raise the temperature of the portion of the first face to at least 800° C. to produce a surface layer of graphitized carbon on the first face of the polymerized fiber reinforced composite and a bulk polymerized fiber reinforced composite representing the polymerized fiber reinforced composite not treated with the electromagnetic radiation,
wherein the surface layer of graphitized carbon comprises an electrical conductivity of 0.25 S m−1 to 2.5 S m−1; and
wherein the surface layer of graphitized carbon comprises a thermal conductivity that is greater than a thermal conductivity of the bulk polymerized reinforced composite.