Heat resistance using titanium dioxide nanofibers

• US 9,683,362 B2
• Filed: 06/10/2013
• Issued: 06/20/2017
• Est. Priority Date: 11/17/2008
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Harris, John N., Slaton, Daniel B.
• Primary Examiner(s): Choi, Peter Y
• Application Number:
  US13/913,641
• Publication Number:
  US 20130295809A1
• Time in Patent Office: 1,471 Days
• Field of Search: 442178, 442180
• CPC Class Codes: C08K 7/08 Oxygen-containing compounds
• CPC Class Codes: D21H 13/46 Non-siliceous fibres, e.g. from metal oxides
• CPC Class Codes: D21H 17/20 Macromolecular organic compounds
• CPC Class Codes: E04B 1/7662 comprising fiber blankets or batts
• CPC Class Codes: Y02T 50/40 Weight reduction
• CPC Class Codes: Y10T 428/237 Noninterengaged fibered material encased [e.g., mat, batt, etc.]
• CPC Class Codes: Y10T 428/238 Metal cover or casing
• CPC Class Codes: Y10T 428/24124 Fibers
• CPC Class Codes: Y10T 442/20 Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
• CPC Class Codes: Y10T 442/2631 Coating or impregnation provides heat or fire protection
• CPC Class Codes: Y10T 442/668 Separate nonwoven fabric layers comprise chemically different strand or fiber material
• CPC Class Codes: Y10T 442/696 Including strand or fiber material which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous compositions, water solubility, heat shrinkability, etc.]

Abstract

A composite structure includes a resin and a plurality of titanium dioxide fibers provided in the resin.

Claims

1. A composite structure, comprising:

a thermoformed, resin-impregnated paper mat;

wherein the resin-impregnated paper mat is fabricated from a plurality of titanium dioxide nanofibers and a binder which are impregnated with a resin to form the resin-impregnated paper mat; and

wherein the titanium dioxide nanofibers have an average diameter of about 10 nanometers and the resin-impregnated paper mat has a thickness no greater than 0.080 inches; and

wherein the composite structure is formed by heating the resin-impregnated paper mat.

2. The composite structure of claim 1 wherein the resin is selected from the group consisting of phenolic, benzoxazine and bis-phenol cyanate ester.

3. The composite structure of claim 1, wherein said titanium dioxide fibers are randomly incorporated into said paper mat.

4. The composite structure of claim 1, wherein said titanium dioxide fibers are non-randomly incorporated into said paper mat.

5. The composite structure of claim 1 wherein said plurality of titanium dioxide fibers comprises a plurality of dyed titanium dioxide fibers.

6. The composite structure of claim 1 wherein said plurality of titanium dioxide fibers comprises a plurality of titanium dioxide fibers doped with anions to provide enhanced electrical conductivity.

16. The composite structure of claim 1, wherein the composite structure forms a light block under a window reveal in an aircraft sidewall panel, the window reveal having a thickness corresponding to said paper mat.

7. An insulation blanket, comprising:

a batting layer comprising only a plurality of titanium dioxide nanofibers having an average diameter of 10 nanometers; and

a plurality of other fibers provided in a blanket body;

wherein the plurality of titanium dioxide nanofibers have been doped with anions to form a plurality of doped titanium dioxide nanofibers;

wherein a paper mat is formed comprising the plurality of doped titanium dioxide nanofibers and a binder, the paper mat having a thickness no greater than 0.080 inches, the plurality of doped titanium dioxide nanofibers randomly oriented in the paper mat;

wherein the paper mat is impregnated with a resin selected from the group consisting of phenolic, benzoxazine and bis-phenol cyanate ester to form a resin-impregnated paper mat;

wherein the insulation blanket is formed by thermoforming the impregnated paper mat.

8. The insulation blanket of claim 7, wherein the plurality of other fibers comprises a second plurality of titanium dioxide nanofibers provided in said blanket body.

9. The insulation blanket of claim 7, wherein the plurality of other fibers comprises at least one of carbon fibers and fiberglass fibers provided in said blanket body.

10. The insulation blanket of claim 9 wherein said plurality of titanium dioxide fibers comprises at least one distinct layer of said plurality of titanium dioxide fibers in said blanket body.

11. The insulation blanket of claim 7 wherein said plurality of titanium dioxide fibers comprises a plurality of dyed titanium dioxide fibers.

17. The insulation blanket of claim 7, wherein the plurality of titanium dioxide nanofibers are in the form of a paper mat.

12. An insulation blanket comprising:

a cover film outer layer; and

at least one layer of titanium dioxide nanofibers having an average diameter of 10 nanometers bonded on said cover film outer layer;

wherein the plurality of titanium dioxide nanofibers have been doped with anions to form a plurality of doped titanium dioxide nanofibers and formed into a paper mat using a binder, the paper mat having a thickness no greater than 0.080 inches, the plurality of doped titanium dioxide nanofibers randomly oriented in the paper mat;

wherein the paper mat is impregnated with a resin selected from the group consisting of phenolic, benzoxazine and bis-phenol cyanate ester to form a resin-impregnated paper mat; and

wherein the insulation blanket is thermoformed from the impregnated paper mat.

13. The insulation blanket cover film of claim 12 wherein said cover film outer layer comprises metal.

14. The insulation blanket cover film of claim 13 wherein said metal comprises aluminum.

18. The insulation blanket of claim 12, wherein the plurality of titanium dioxide nanofibers are in the form of a paper mat.

15. A composite structure, comprising:

a resin selected from the group consisting of phenolic, benzoxazine and bis-phenol cyanate ester;

a plurality of titanium dioxide fibers having an average diameter of about 10 nanometers provided in said resin provided in said resin;

said plurality of titanium dioxide fibers are doped with anions to enhance electrical conductivity of said plurality of titanium dioxide fibers;

wherein the plurality of titanium dioxide nanofibers have been doped with the anions to form a plurality of doped titanium dioxide nanofibers and formed into a paper mat using a binder, the paper mat having a thickness no greater than 0.080 inches, the plurality of doped titanium dioxide nanofibers randomly oriented in the paper mat;

wherein the paper mat is impregnated with the resin to form a resin-impregnated paper mat and the composite structure is thermoformed from the resin-impregnated paper mat.