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US 11,560,461 B2Granted
Additive for fiber strengthening
AssigneeNorth Carolina State University
InventorsEricka Ford, Chunhong Lu, Charles Blackwell
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Abstract
Compositions that include a polymer and an aldaric acid, such as glucaric acid, are disclosed. The compositions may include polyvinyl alcohol and glucaric acid. The compositions may also include polyacrylonitrile and glucaric acid. In addition, the compositions may further include lignin. Also disclosed are fibers including the compositions, methods of making the fibers, and uses of the fibers.
Claims19
A composition comprising:
- a polymer having a plurality of hydroxyl groups or nitrile groups;
- an aldaric acid or a salt thereof:
- and
- an additive selected from the group consisting of lignin, carbon nanotubes, nanofillers and a combination thereof.
1 more element
A method of making a fiber, the method comprising:
- dissolving a polymer having a plurality of hydroxyl and/or nitrile groups and an aldaric acid or a salt thereof in a first solvent to provide a solution;
- heating the solution;
- extruding the solution into a first bath comprising a second solvent to provide a gel- spun fiber;
- aging the gel-spun fiber to provide an aged gel-spun fiber;
- and
- drawing the aged gel-spun fiber through a second bath comprising silicone oil to provide the fiber.
3 more elements
Dependencies are inferred from the claim text.