Carbon foam core panels
View Patent ↗The core panel includes a plurality of carbon foam blocks. One or more of the blocks have a cell volume wherein at least about 90% of the cells have a diameter of between at least about 10 microns and about 150 microns. Also at least about 1% of the cell volume of the block has cells having a diameter of about 0.8 microns to about 3.5 microns.
1. A core panel comprising a plurality of carbon foam blocks, one or more of the blocks have a cell volume wherein at least about 90% of cells have a diameter of between at least about 10 microns and about 150 microns and at least about 1% of the cells have a diameter of between about 0.8 microns to about 3.5 microns.
2. The core panel of claim 1 wherein a compressive strength to density ratio of the one or more block comprises at least about 500 psi/g/cc.
3. The core panel of claim 1 further comprising a plurality of struts, wherein each strut disposed between at least two adjacent foam blocks, thereby forming an assembly.
4. The core panel of claim 1 wherein a density of the one or more blocks comprises about 0.32 g/cc or less.
5. The core panel of claim 4 wherein the density comprises about 0.03 g/cc to about 0.32 g/cc.
6. The core panel of claim 1 wherein said one or more blocks comprises all blocks of the panel.
7. The core panel of claim 1 wherein said one or more block infused with a polymer resin.
8. The core panel of claim 1 the one or more blocks has a porosity of between about 65% and about 95%.
9. The core panel of claim 1 the one or more blocks has a permeability of no greater than about 3.0 darcys.
10. The core panel of claim 1 wherein the cells of the one or more blocks have an aspect ratio, on average, of about 1.0 to about 5.
11. The core panel of claim 3 further comprising a first layer of fibrous rovings continuously and helically surrounding said assembly along the length thereof, a second layer of fibrous rovings continuously and helically surrounding said first layer on said assembly along the length thereof, said rovings in said second layer extending helically in an opposite direction and crossing said rovings of said first layer.
12. The core panel of claim 11 further comprising one or more reinforcing members, each reinforcing member comprise at least one layer of fibrous rovings extending helically around at least one block.
13. The core panel of claim 11 further comprising at least one outer surface including a facesheet.
14. The core panel of claim 13 wherein the facesheet constructed from a material which comprises at least one or more of glass fibers, plastic, carbon fiber, nanofibers, polymer fibers, fillers, and combinations thereof.
15. The core panel of claim 13 wherein at least one of the face sheet, one or more of the carbon foam blocks, the first layer of fibrous roving, and combinations thereof including at least one of carbon nanotubes, carbon nanofibers, and combinations thereof.
16. The core panel of claim 11 further comprising generally continuous fibrous rovings extending in the machine direction of the assembly adjacent one of the first layer and the second layer.