Reinforced graphitic material

Patent metadata

Field	Value
Publication number	US-10113095-B2
Application number	US-201514804185-A
Country	US
Kind code	B2
Filing date	Jul 20, 2015
Priority date	Jul 20, 2015
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

Examples are disclosed that relate to the manufacture of a reinforced graphitic material. One example provides a method for making a reinforced graphitic material including sorbing an organic compound into void space of a graphitic host material, and heating the graphitic host material to pyrolyze the sorbed organic compound. Elemental carbon is thereby deposited in the void space.

First claim

The invention claimed is:

1. A method for making a reinforced graphitic material, the method comprising:
sorbing a solution of an organic compound into void space between graphitic platelets of a graphitic host material;
mechanically pressing the graphitic host material while heating the graphitic host material to evaporate a solvent of the solution and deposit sorbed organic compound into the void space;
heating the graphitic host material with the sorbed organic compound to pyrolyze the sorbed organic compound and thereby deposit elemental carbon in the void space, the elemental carbon crosslinking the graphitic platelets of the graphitic host material; and
after heating the graphitic host material with the sorbed organic compound to pyrolyze the sorbed organic compound, mechanically re-pressing while heating the graphitic host material.

2. The method of claim 1 , wherein the graphitic host material includes graphene.

3. The method of claim 1 , wherein the graphitic host material includes graphene flakes 100 to 1000 micrometers in thickness.

4. The method of claim 1 , wherein the graphitic host material includes from 10 to 20% void space by volume prior to sorbing the solution of the organic compound into void space of the graphitic host material.

5. The method of claim 1 , further comprising forming the graphitic host material by one or more of chemical vapor decomposition and physical vapor deposition.

6. The method of claim 1 , wherein the organic compound includes a carbohydrate.

7. The method of claim 1 , wherein the organic compound includes a sugar.

8. The method of claim 1 , further comprising:
making the solution by dissolving the organic compound in the solvent.

9. The method of claim 1 , wherein the solvent includes water.

10. The method of claim 1 , wherein mechanically pressing the graphitic host material while heating the graphitic host material includes loading the graphitic host material up to 10,000 pounds per square inch.

11. The method of claim 10 , wherein mechanically pressing the graphitic host material while heating the graphitic host material includes heating at a temperature at which the organic compound is not pyrolyzed.

12. The method of claim 1 , wherein the solution includes a surfactant.

13. The method of claim 1 , wherein heating the graphitic host material with the sorbed organic compound includes heating under vacuum.

14. The method of claim 1 , wherein heating the graphitic host material with the sorbed organic compound includes heating under an inert atmosphere.

15. The method of claim 1 , wherein mechanically re-pressing while heating the graphitic host material comprises loading the graphitic host material up to 10,000 pounds per square inch.

16. The method of claim 1 , further comprising machining the graphitic host material with the elemental carbon deposited therein.

17. A method for making a heat spreader, the method comprising:
making a solution by dissolving an organic compound in a solvent;
sorbing the solution into void space between graphitic platelets of a graphitic host material;
mechanically pressing while heating the graphitic host material to evaporate the solvent and leave behind a sorbed residue of the organic compound in the void space;
heating the graphitic host material with the sorbed residue of the organic compound to pyrolyze the organic compound and thereby deposit elemental carbon in the void space, the elemental carbon crosslinking the graphitic platelets of the graphitic host material; and
mechanically re-pressing the graphitic host material with the elemental carbon deposited therein.

Assignees

• Microsoft Technology Licensing Llc

Inventors

• Hurbi Erin

Classifications

• C09K5/14 Primary

  Solid materials, e.g. powdery or granular · CPC title

• C23C16/56

  After-treatment · CPC title

• C23C18/1291

  by heating of the substrate · CPC title

• F28D15/0233

  the conduits having a particular shape, e.g. non-circular cross-section, annular (F28D15/0241, F28D15/0266 take precedence) · CPC title

• C04B38/0074

  expressed as porosity percentage · CPC title