Ordered open-cellular carbon microstructure and method of making same

• US 9,926,199 B1
• Filed: 09/30/2013
• Issued: 03/27/2018
• Est. Priority Date: 06/27/2007
• Status: Active Grant

• Current Assignee: HRL Laboratories LLC (The Boeing Co.)
• Original Assignee: HRL Laboratories LLC (The Boeing Co.)
• Inventors: Jacobsen, Alan J.
• Primary Examiner(s): Thompson, Camie S
• Application Number:
  US14/041,756
• Time in Patent Office: 1,639 Days
• Field of Search: 264 124, 52633, 4283155, 4283157, 4283166, 4283159, 385129, 385130, 385131
• CPC Class Codes: B29C 67/20 for porous or cellular articles, e.g. of foam plastics, coarse-pored chemical aspects of working up macro-molecular substances to porous or cellular articles C08J9/00
• CPC Class Codes: B29D 11/00663 Production of light guides
• CPC Class Codes: C01B 32/00 Carbon; Compounds thereof C01B21/00, C01B23/00 take precedence; percarbonates C01B15/10; carbon black C09C1/48
• CPC Class Codes: G02B 2006/1219 Polymerisation
• CPC Class Codes: G02B 6/12002 Three-dimensional structures
• CPC Class Codes: G02B 6/1221 made from organic materials

Abstract

An ordered open-cellular carbon microstructure and a methods for forming the ordered open-cellular carbon microstructure capable of greatly improving the carbon yield (remaining mass % after carbonization) of an open-cellular polymer material. In one embodiment, the method starts with providing an ordered open-cellular polymer template material. The polymer template material is immersed in a reservoir containing a liquid monomer solution, wherein the liquid monomer solution swells the polymer material. Then the polymer template material is removed from the reservoir containing liquid monomer solution. Excess liquid monomer solution is removed from the polymer template material. The liquid monomer solution absorbed into the polymer template material is polymerized forming a copolymer material by irradiating the template material with ultraviolet (UV) light in a nitrogen environment. The copolymer material is heated in an inert atmosphere, wherein the copolymer material is carbonized resulting in the ordered open-cellular carbon microstructure.

Claims

1. An ordered open-cellular carbon microstructure comprising:

a plurality of first carbonized truss elements extending along a first direction;

a plurality of second carbonized truss elements extending along a second direction; and

a plurality of third carbonized truss elements extending along a third direction,

wherein the first, second, and third carbonized truss elements interpenetrate each other at a plurality of nodes to form a continuous material, and

wherein the ordered open-cellular carbon microstructure is self-supporting.

2. The ordered open-cellular carbon microstructure as set forth in claim 1, wherein the first, second, and third carbonized truss elements are defined by a plurality of polymer waveguides interconnected to each other as an ordered open-cellular polymer template.

3. The ordered open-cellular carbon microstructure as set forth in claim 1, wherein the continuous material substantially lacks interior boundaries.

4. The ordered open-cellular carbon microstructure as set forth in claim 1, wherein the first, second, and third carbonized truss elements are adapted to axially transfer a mechanical load applied to the ordered open-cellular carbon microstructure.

5. The ordered open-cellular carbon microstructure as set forth in claim 1, wherein the plurality of first carbonized truss elements, the plurality of second carbonized truss elements, and the plurality of third carbonized truss elements comprise a carbonized polyacrylonitrile (PAN) material.

6. The ordered open-cellular carbon microstructure as set forth in claim 1, wherein the plurality of first carbonized truss elements, the plurality of second carbonized truss elements, and the plurality of third carbonized truss elements comprise a carbonized copolymer of polyurethane.