Method of making carbon fibers from lignin
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United States of America Patent
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Jun 20, 2017
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N/A
app pub date -
Aug 20, 2013
filing date -
Sep 20, 2012
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Abstract
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.
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International Classification(s)
- D01D:MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE....
- C01B:NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
- C08H:DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C07G:COMPOUNDS OF UNKNOWN CONSTITUTION
- D02J:FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS....
- D01F:CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL....
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