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1. WO2020110090 - COMPOSITIONS POLYMÈRES COMPRENANT DES NANOTUBES DE CARBONE FONCTIONNALISÉS ET UN MATÉRIAU CELLULOSIQUE CRISTALLIN

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. A polymeric composite material comprising:

one or more polymers;

crystalline cellulose; and

functionalized carbon nanotubes, wherein the functionalized carbon nanotubes have an oxidation level between 3 and 25 wt% as determined by thermogravimetric analysis (TGA).

2. The polymeric composite material of claim 1, further comprising a surfactant.

3. The polymeric composite material of claim 2, wherein the surfactant includes C8-C20 type surfactants.

4. The polymeric composite material of claim 1, wherein the crystalline cellulose corresponds to a synergist of the functionalized carbon nanotubes, wherein the crystalline cellulose includes crystalline cellulose, microcrystalline cellulose, nano crystalline cellulose, or a combination thereof, and wherein the crystalline cellulose and the functionalized carbon nanotubes correspond to filler material of the one or more polymers.

5. The polymeric composite material of claim 1, wherein the crystalline cellulose is covalently bonded or coordinated to functional groups of the functionalized carbon nanotubes and/or is bonded to or coordinated with polymer molecules of the one or more polymers.

6. The polymeric composite material of claim 1, further comprising carbon black, carbon fibers, graphene, carbon nanostructures, non-functionalized multi-wall carbon nanotubes, single-walled functionalized or non-functionalized carbon nanotubes, or a combination thereof.

7. The polymeric composite material of claim 1, wherein the functionalized carbon nanotubes have one or more characteristics selected from the group of: a length of between 0.4 and 15 microns, 2 to 15 walls, or any combination thereof, and wherein performing the TGA includes heating dried functionalized carbon nanotubes at a rate of 5 degrees C per minute from room temperature to 1000 degrees C in a dry nitrogen atmosphere, and wherein the oxidation level of the functionalized carbon nanotubes is based on a percentage weight loss from 200 to 600 degrees.

8. The polymeric composite material of claim 1, wherein the polymer is selected from the group consisting of polycarbonate (PC), polylactide, acrylonitrile butadiene styrene, polybutylene terephthalate, polyethylene terephthalate, polyethylene naphthalate, phenyl-N-tert-butylnitrone, polyamides, polyolefins, PC copolymers, polyphenylene ether, polyetherimide, polystyrene, polymethylmethacrylate, or any combination thereof.

9. The polymeric composite material of claim 1, wherein the crystalline cellulose and the functionalized carbon nanotubes have different scales, dimensions, or a combination thereof, and wherein the crystalline cellulose and the functionalized carbon nanotubes multiscale reinforce a polymer matrix of the one or more polymers.

10. The polymeric composite material of claim 9, wherein the functionalized carbon nanotubes have an average aspect ratio of less than 800.

11. The polymeric composite material of claim 9, wherein the multiscale reinforced polymer has improved creep performance as compared to non-multi scale reinforced polymers.

12. The polymeric composite material of claim 9, wherein polymer comprises a polyamide.

13. The polymeric composite material of claim 9, wherein the creep performance is measured according ASTM E139.

14. The polymeric composite material of claim 9, wherein the creep performance is a more than 200 percent improvement as compared to a base resin of the one or more polymers.

15. A method of forming a polymeric composite material, the method comprising:

receiving a polymer composition including one or more polymers, functionalized carbon nanotubes, and crystalline cellulose, wherein the functionalized carbon nanotubes have an oxidation level between 3 and 25 wt% as determined by thermogravimetric analysis (TGA); and

forming the polymeric composite material based on the polymer composition, wherein the crystalline cellulose is absorbed on a surface of the functionalized carbon nanotubes.

16. The method of claim 15, further comprising

adding the functionalized carbon nanotubes to the crystalline cellulose to create a CC- CNT dispersion; and

blending the CC-CNT dispersion with the polymer to form the polymer composition.

17. The method of claim 15, further comprising adding a surfactant to the crystalline cellulose, wherein the surfactant inhibits agglomeration of the functionalized carbon nanotubes and the crystalline cellulose.

18. The method of claim 17, wherein the functionalized carbon nanotubes and the surfactant are combined to form a mixture, and further comprising adding the mixture to the crystalline cellulose by an ultrasonification process.

19. The method of claim 15, further comprising:

receiving, at an extrusion device form a liquid feeder, a CC-CNT dispersion;

combining, at the extrusion device, the polymer and the CC-CNT dispersion; and outputting, from the extrusion device to a die, the polymer composition including the functionalized carbon nanotubes and the crystalline cellulose.

20. A polymer material formed by the method of any of claims 15-19.