Method of fabricating electrically conductive aerogels

Patent metadata

Field	Value
Publication number	US-10125052-B2
Application number	US-201514661855-A
Country	US
Kind code	B2
Filing date	Mar 18, 2015
Priority date	May 6, 2008
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

Electrically conductive aerogel and methods of making the same are disclosed. A solution is provided. The solution is cured to form a polymer. The polymer is carbonized to form the conductive aerogel.

First claim

What is claimed is:

1. A method of fabricating an electrospray thruster component with an electrically conductive aerogel comprising:
curing a solution in a mold of the electrospray thruster component to form a polymer precursor of the electrospray thruster component, wherein the electrospray thruster component is a distal electrode of an electrospray thruster; and
carbonizing the polymer precursor to form the conductive aerogel, wherein the component includes a pore size gradient across the component.

2. The method of claim 1 , further comprising pouring the solution into the mold.

3. The method of claim 1 , further comprising submerging at least a portion of a wire in the solution.

4. The method of claim 3 , wherein submerging the wire in the solution comprises inserting the wire into the solution.

5. The method of claim 3 , wherein submerging the wire in the solution includes suspending the wire in the mold of the electrospray thruster component with at least a portion of the wire submerged in the solution.

6. The method of claim 5 , wherein suspending the wire in the mold includes suspending the wire in the mold with a mount associated with the mold.

7. The method of claim 3 , wherein curing the solution includes curing the solution to form the polymer with the wire embedded in the polymer.

8. The method of claim 3 , further comprising carbonizing the polymer with the wire embedded in the polymer to form the electrospray thruster component.

9. The method of claim 3 , wherein the wire comprises stainless steel, nickel, chromium, or platinum.

10. The method of claim 3 , wherein the wire forms an electrical contact of the electrospray thruster component.

11. The method of claim 1 , further comprising forming the solution by combining at least deionized water, formaldehyde, resorcinol, and acetic acid.

12. The method of claim 1 , wherein carbonizing the polymer to form the conductive aerogel comprises pyrolyzing the polymer.

13. The method of claim 1 , wherein carbonizing the polymer to form the conductive aerogel comprises pyrolyzing the polymer in an environment comprising at least one of carbon dioxide, nitrogen, and argon.

14. The method of claim 1 , wherein a surface area of the electrically conductive aerogel is at least 400 m 2 per gram.

15. A method of fabricating an electrospray thruster component with an electrically conductive aerogel comprising:
curing a solution to form a polymer precursor of the electrospray thruster component; allowing the polymer precursor to rest until a solvent in the precursor has evaporated; and
carbonizing the polymer precursor to form the conductive aerogel, wherein the component includes a pore size gradient across the component.

16. The method of claim 15 , comprising curing the solution in a mold to form the polymer precursor.

17. The method of claim 15 , comprising curing the solution in a sealed container.

18. The method of claim 17 , comprising curing the solution in the sealed container at between or equal to 60 degrees Celsius and 85 degrees Celsius.

19. A method of fabricating an electrospray thruster component with an electrically conductive aerogel comprising:
curing a solution to form a polymer precursor of the electrospray thruster component;
submerging at least a portion of a wire in the solution, wherein the wire includes one or more bends along a portion of the wire embedded in the polymer; and
carbonizing the polymer precursor to form the conductive aerogel.

20. The method of claim 19 , wherein the component includes a pore size gradient across the component.

21. The method of claim 19 , wherein the electrospray thruster component is a distal electrode of the electrospray thruster.

22. The method of claim 19 , further comprising carbonizing the polymer with the wire embedded in the polymer to form the electrospray thruster component.

23. The method of claim 19 , wherein the wire comprises stainless steel, nickel, chromium, or platinum.

Assignees

• Massachusetts Inst Technology

Inventors

• Lozano Paulo C
• Arestie Steven Mark

Classifications

• C04B35/64

  Burning or sintering processes (C04B33/32 takes precedence {; powder metallurgy B22F}) · CPC title

• F03H1/0006

  Details applicable to different types of plasma thrusters (arrangements specially adapted for fitting plasma engines in or to cosmonautic vehicles B64G1/413) · CPC title

• H01J37/08

  Ion sources; Ion guns · CPC title

• C04B35/528 Primary

  obtained from carbonaceous particles with or without other non-organic components · CPC title

• C01B32/05 Primary

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