Conversion of additively manufactured organic polymer parts to substantially pure carbon

Patent metadata

Field	Value
Publication number	US-10196270-B2
Application number	US-201615208501-A
Country	US
Kind code	B2
Filing date	Jul 12, 2016
Priority date	Jul 12, 2016
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

In one embodiment, a method includes creating a three-dimensional, carbon-containing structure using an additive manufacturing technique and converting the three-dimensional, carbon-containing structure to a substantially pure carbon structure. Moreover, the substantially pure carbon structure has an average feature diameter of less than about 100 nm. In another embodiment, a product includes a substantially pure carbon structure having an average feature diameter of less than about 100 nm. In yet another embodiment, a product includes an aerogel having inner channels corresponding to outer walls of a three-dimensional printed template around which the aerogel was formed. In addition, the inner channels have an average feature diameter of less than about 100 nm.

First claim

What is claimed is:

1. A product, comprising:
a substantially pure carbon three dimensional printed structure having an average feature diameter of less than about 100 nm, wherein the structure has features arranged in a geometric pattern, wherein a largest average distance between adjacent features is greater than an actual average diameter of the features, wherein the substantially pure carbon three dimensional printed structure comprises at least 95% carbon.

2. The product of claim 1 , wherein the substantially pure carbon three dimensional printed structure has at least one of an edge and a diameter of at least 1 mm in length.

3. The product of claim 1 , wherein the substantially pure carbon three dimensional printed structure has at least one of an edge and a diameter of at least 1 cm in length.

4. The product of claim 1 , wherein the substantially pure carbon three dimensional printed structure is electrically conductive.

5. The product of claim 1 , wherein the three dimensional printed structure is an octet truss.

6. The product of claim 1 , wherein the features are located at pre-defined locations in the three dimensional printed structure.

7. The product of claim 1 , wherein the three dimensional printed structure is a template.

8. The product of claim 1 , wherein the three dimensional printed structure is a template around which an aerogel is formed.

9. The product of claim 1 , wherein at least some of the features in the geometric pattern are arranged in approximately regular intervals.

10. The product of claim 1 , wherein the features of the structure include extruded lines.

11. The product of claim 10 , wherein the extruded lines intersect one another at approximately regular intervals.

12. The product of claim 10 , wherein a first group of the extruded lines are parallel to one another and arranged along a first direction, wherein a second group of the extruded lines are parallel to one another and arranged along a second direction that is different than the first direction, wherein extruded lines in the first group intersect the extruded lines in the second group at approximately regular intervals.

13. A method of forming the product of claim 1 , the method comprising:
creating a three-dimensional, carbon-containing structure using an additive manufacturing technique; and
converting the three-dimensional, carbon-containing structure to the substantially pure carbon structure,
wherein the substantially pure carbon structure has the average feature diameter of less than about 100 nm.

14. The method of claim 13 , wherein the substantially pure carbon structure has at least one of an edge and a diameter of at least 1 mm in length.

15. The method of claim 13 , wherein the substantially pure carbon structure has at least one of an edge and a diameter of at least 1 cm in length.

16. The method of claim 13 , wherein converting the three-dimensional, carbon-containing structure to the substantially pure carbon structure includes heating the three-dimensional, carbon-containing structure in a vacuum.

17. The method of claim 16 , wherein the heating is performed in a sequence of steps, each step including an increasing heating rate and a holding period at a predefined temperature.

18. The method of claim 13 , wherein converting the three-dimensional, carbon-containing structure to the substantially pure carbon structure includes heating the three-dimensional, carbon-containing structure in an inert atmosphere.

19. The method of claim 18 , wherein the heating is performed in a sequence of steps, each step including an increasing heating rate and a holding period at a predefined temperature.

Assignees

• L Livermore Nat Security Llc

Inventors

• Campbell Patrick
• Baumann Theodore F
• Biener Juergen
• Chandrasekaran Swetha
• Oakdale James S
• Worsley Marcus A

Classifications

• C01P2006/40

  Electric properties · CPC title

• C01B32/05 Primary

  Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30 · CPC title

• B01J13/0091

  Preparation of aerogels, e.g. xerogels · CPC title