Tucker Ellis, LLP
Method of making carbon fibers from lignin
A method of making a carbon fiber includes heat treating a lignin precursor absent an active ingredient in an inert atmosphere to raise the glass transition temperature (Tg) of the precursor by at least five (5%) percent, forming a lignin precursor having an increased Tg (High Tg Lignin). The High Tg Lignin can be spun into a fiber. The fiber may then be stabilized to form a thermoset fiber. The time period for stabilizing the fiber is less than one hundred (100) hours.
GrafTech International Holdings Inc.
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D01D D01F C07G
inventional inventional inventional
Brian Paul Orest L Ching-Feng Omer Andrew Robert E Chong Bassam
Askey Adrianowycz Chang Gul Hausner Miller Chen Alnasleh