Multilayer conformable composites

Patent metadata

Field	Value
Publication number	US-10717844-B2
Application number	US-201815916368-A
Country	US
Kind code	B2
Filing date	Mar 9, 2018
Priority date	Sep 14, 2015
Publication date	Jul 21, 2020
Grant date	Jul 21, 2020

Abstract

A composite including a heat conformable polymer and a nanofiber sheet is disclosed. The heat conformable polymer can be a hot melt adhesive, and the combination can provide an electrically conductive hot melt adhesive composite. The nanofiber layer is protected and the composite is conformable and/or can be adhered to a variety of surfaces.

First claim

The invention claimed is:

1. A nanofiber composite comprising:
a nanofiber sheet comprising carbon nanotubes aligned end to end in a plane of the nanofiber sheet;
a conformal buffer layer of a carbide forming metal on surfaces of the carbon nanotubes within the sheet;
a conformal layer of an electrically conductive metal on the conformal buffer layer, wherein the nanofiber sheet has an electrical resistance of less than 1000 ohms/square; and
a heat conformable polymer layer adhered to the nanofiber sheet.

2. The nanofiber composite of claim 1 , wherein the nanofiber sheet has an average thickness of less than 100 nm.

3. The nanofiber composite of claim 1 , wherein the nanofiber sheet is embedded in the polymer layer.

4. The nanofiber composite of claim 1 , further comprising a metal layer on a surface of the nanofiber sheet.

5. The nanofiber composite of claim 4 wherein at least a portion of the metal layer is exposed through the polymer layer.

6. The nanofiber composite of claim 1 , further comprising a plurality of nanofiber sheets.

7. The nanofiber composite of claim 6 , wherein each of the plurality of nanofiber sheets are in electrical contact with each other.

8. The nanofiber composite of claim 6 , wherein the plurality of nanofiber sheets are electrically isolated from each other.

9. The nanofiber composite of claim 6 , wherein at least one conformable polymer layer is layered between the plurality of nanofiber sheets.

10. The nanofiber composite of claim 1 , wherein the composite transmits greater than 98% of visible light at 90° to a surface of the nanofiber composite.

11. The nanofiber composite of claim 1 , further comprising a glass or ceramic or transparent polymer.

12. The nanofiber composite of claim 1 , wherein the heat conformable polymer layer comprises polyvinyl butyral, or ethylene-vinyl acetate.

13. The nanofiber composite of claim 1 , wherein the composite comprises a vehicle windshield or window.

14. The nanofiber composite of claim 1 , wherein the conformal buffer layer comprises titanium and the electrically conductive metal is copper.

15. The nanofiber composite of claim 1 , wherein the carbon nanotubes at an exposed surface of the nanofiber sheet comprise an oxide layer.

16. The nanofiber composite of claim 1 , wherein the heat conformable polymer layer is buckled.

Assignees

• Lintec America Inc
• Lintec Corp

Inventors

• Lima Marcio D
• Bykova Julia

Classifications

• Y10T428/30

  Self-sustaining carbon mass or layer with impregnant or other layer · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• C08J7/044

  Forming conductive coatings; Forming coatings having anti-static properties · CPC title

• C08J7/043

  Improving the adhesiveness of the coatings per se, e.g. forming primers (adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50) · CPC title

• C08K3/041 Primary

  Carbon nanotubes · CPC title