Fabric of continuous graphitic fiber yarns from living graphene molecules
View Patent ↗Multi-functional and high-performing fabric comprising a first layer of yarns woven to form the fabric wherein the yarns comprise at least one unitary graphene-based continuous graphitic fiber comprising at least 90% by weight of graphene planes that are chemically bonded with one another having an inter-planar spacing d 002 from 0.3354 nm to 0.4 nm as determined by X-ray diffraction and an oxygen content less than 5% by weight. A majority of the graphene planes in such a continuous graphitic fiber are parallel to one another and parallel to a fiber axis direction. The graphitic fiber contains no core-shell structure, has no helically arranged graphene domains or domain boundaries, and has a porosity level less than 5% by volume, more typically less than 2%, and most typically less than 1% (practically pore-free).
1. A fabric comprising a first layer of yarns woven to form the fabric wherein said yarns comprise at least one unitary graphene-based continuous graphitic fiber comprising at least 90% by weight of graphene planes that are chemically bonded with one another having an inter-planar spacing d 002 from 0.3354 nm to 0.4 nm as determined by X-ray diffraction and an oxygen content less than 5% by weight, wherein said graphene planes are parallel to one another and parallel to a fiber axis direction and said graphitic fiber contains no core-shell structure, has no helically arranged graphene domains or domain boundary, and has a porosity level less than 5% by volume.
2. The fabric of claim 1 , wherein said inter-planar spacing d 002 is from 0.3354 nm to 0.36 nm, the oxygen content is less than 2% by weight, and/or the porosity level is less than 2% by volume.
3. The fabric of claim 1 , wherein the fabric, the yarns, or the continuous graphitic fiber has a cross-section that is rectangular or flat-shaped, having a width and a thickness.
4. The fabric of claim 3 , wherein the fabric, the yarns, or the continuous graphitic fiber has a width-to-thickness ratio greater than 5.
5. The fabric of claim 1 , wherein the fabric or a yarn has a thickness less than 1 μm.
6. The fabric of claim 1 , wherein the fabric or a yarn has a thickness less than 100 nm.
7. The fabric of claim 1 , wherein the yarn has a packing factor greater than 60%.
8. The fabric of claim 1 , wherein the yarn has a packing factor greater than 70%.
9. The fabric of claim 1 , wherein the yarn has a packing factor greater than 80%.
10. The fabric of claim 1 , wherein said continuous graphitic fiber has an oxygen content less than 1%, an inter-graphene spacing less than 0.345 nm, a thermal conductivity of at least 1,000 W/mK, and/or an electrical conductivity no less than 3,000 S/cm.
11. The fabric of claim 1 , wherein said continuous graphitic fiber has an oxygen content less than 0.01%, an inter-graphene spacing less than 0.337 nm, a thermal conductivity of at least 1,200 W/mK, and/or an electrical conductivity no less than 5,000 S/cm.
12. The fabric of claim 1 , wherein said continuous graphitic fiber has an oxygen content no greater than 0.001%, an inter-graphene spacing less than 0.336 nm, a mosaic spread value no greater than 0.7, a thermal conductivity of at least 1,500 W/mK, and/or an electrical conductivity no less than 8,000 S/cm.
13. The fabric of claim 1 , wherein said continuous graphitic fiber has an inter-graphene spacing less than 0.336 nm, a mosaic spread value no greater than 0.4, a thermal conductivity greater than 1,700 W/mK, and/or an electrical conductivity greater than 12,000 S/cm.
14. The fabric of claim 1 , wherein said continuous graphitic fiber has an inter-graphene spacing less than 0.337 nm and a mosaic spread value less than 1.0.
15. The fabric of claim 1 , wherein said continuous graphitic fiber has a degree of graphitization no less than 40% and/or a mosaic spread value less than 0.7.
16. The fabric of claim 1 , wherein said continuous graphitic fiber has a degree of graphitization no less than 80% and/or a mosaic spread value no greater than 0.4.
17. The fabric of claim 1 , wherein said continuous graphitic fiber contains chemically bonded graphene molecules or chemically merged graphene planes that are parallel to one another.
18. The fabric of claim 1 , wherein said continuous graphitic fiber contains a first graphene domain containing bonded graphene planes parallel to one another and having a first crystallographic c-axis, and a second graphene domain containing bonded graphene planes parallel to one another and having a second crystallographic c-axis wherein the first crystallographic c-axis and the second crystallographic c-axis are inclined with respect to each other at an angle less than 10 degrees.
19. The fabric of claim 1 , wherein said continuous graphitic fiber contains a poly-crystal graphite structure with graphene molecules being oriented along a fiber axis direction.
20. The fabric of claim 1 , wherein said continuous graphitic fiber has a poly-crystal graphitic structure having a grain size larger than 10 μm.
21. The fabric of claim 1 , wherein said continuous graphitic fiber has a poly-crystal graphitic structure having a grain size larger than 100 μm.
22. The fabric of claim 1 , wherein said continuous graphitic fiber has a poly-crystal graphitic structure having a grain size larger than 1 mm.
23. The fabric of claim 1 , wherein said continuous graphitic fiber has an electrical conductivity greater than 3,000 S/cm, a thermal conductivity greater than 600 W/mK, a physical density greater than 1.7 g/cm 3 , a Young's modulus greater than 60 GPa, and/or a tensile strength greater than 1.2 GPa.
24. The fabric of claim 1 , wherein said continuous graphitic fiber has an electrical conductivity greater than 5,000 S/cm, a thermal conductivity greater than 1,000 W/mK, a physical density greater than 1.8 g/cm 3 , a Young's modulus greater than 200 GPa, and/or a tensile strength greater than 3.2 GPa.
25. The fabric of claim 1 , wherein said continuous graphitic fiber has an electrical conductivity greater than 15,000 S/cm, a thermal conductivity greater than 1,500 W/mK, a physical density greater than 1.9 g/cm 3 , a Young's modulus greater than 300 GPa, and/or a tensile strength greater than 5.0 GPa.
26. The fabric of claim 1 , wherein said continuous graphitic fiber has an electrical conductivity greater than 18,000 S/cm, a thermal conductivity greater than 1,700 NV/111K, a physical density greater than 1.9 g/cm 3 , a Young's modulus greater than 600 GPa, and/or a tensile strength greater than 8.0 GPa.
27. The fabric of claim 1 , wherein said yarns comprise at least one fiber selected from the group consisting of wool, cotton, asbestos, nylon, synthetic, carbon nanotubes, and graphene-based graphitic fiber.
28. The fabric of claim 1 , wherein said first layer of yarns woven together exhibit the physical, electrical, mechanical, chemical, or thermal properties of said unitary graphene-based continuous graphitic fibers that constitute said yarns.
29. The fabric of claim 1 , wherein said fabric comprises at least one additional layer of yarns woven together.
30. The fabric of claim 29 wherein said additional layer of yarns further comprise a unitary graphene-based continuous graphitic fiber.
31. The fabric of claim 1 , which is a woven fabric comprising a flat yarn of graphene-derived graphitic fibers as at least its warp or weft.
32. The fabric of claim 31 , wherein said flat yarn is twist-free and the ratio of yarn width to yarn thickness is from 10 to 150.
33. A filter containing the fabric of claim 1 as a filtering element.