Method of transferring carbon conductive film

• US 9,067,393 B2
• Filed: 03/12/2013
• Issued: 06/30/2015
• Est. Priority Date: 10/29/2012
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Huang, Shu-Jiuan, Kuo, Shin-Liang, Huang, Cheng-Jyun
• Primary Examiner(s): Chan, Sing P
• Application Number:
  US13/796,048
• Publication Number:
  US 20140116609A1
• Time in Patent Office: 840 Days
• Field of Search: 156/230, 156/236, 156/242, 156/246, 156/247, 156/249, 428/343
• US Class Current: 1/1
• CPC Class Codes: B32B 2037/243 Coating
• CPC Class Codes: B32B 2307/202 Conductive
• CPC Class Codes: B32B 2313/04 Carbon
• CPC Class Codes: B32B 37/02 characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
• CPC Class Codes: B32B 38/10 Removing layers, or parts of layers, mechanically or chemically
• CPC Class Codes: B32B 38/164 Drying

Abstract

Disclosed is a method of transferring a carbon conductive film, including: providing a first substrate, and forming an inorganic oxide layer on a surface of the first substrate, wherein the inorganic oxide layer has a total surface energy of 30 mJ/m² to 75 mJ/m², and a dispersive surface energy to the total surface energy ratio of 0.4 to 0.8. A carbon dispersion is coated on the inorganic oxide layer, and then dried to form a carbon conductive film on the inorganic oxide layer. The carbon conductive film is dipped into a solvent to separate the carbon conductive film and the inorganic oxide layer. The separated carbon conductive film is attached to a second substrate, thereby transferring the carbon conductive film onto the second substrate.

Claims

1. A method for transferring a carbon conductive film, comprising:

providing a first substrate;

forming an inorganic oxide layer on a surface of the first substrate, wherein the inorganic oxide layer has a total surface energy of 30 mJ/m² to 75 mJ/m², and a dispersive surface energy to the total surface energy ratio of 0.4 to 0.8;

coating a carbon dispersion on the inorganic oxide layer;

drying the carbon dispersion to form a carbon conductive film on the inorganic oxide layer;

dipping the carbon conductive film into a solvent to separate the carbon conductive film and the inorganic oxide layer; and

attaching the separated carbon conductive film to a second substrate, thereby transferring the carbon conductive film onto the second substrate.

2. The method as claimed in claim 1, wherein the step of forming the inorganic oxide layer on the surface of the first substrate comprises:

coating a dispersion of inorganic oxide particles on the surface of the first substrate, wherein the inorganic oxide particles are sol in solvent phase; and

drying the dispersion of the inorganic oxide particles to form the inorganic oxide layer.

3. The method as claimed in claim 2, wherein the inorganic oxide particles have a size of 2 nm to 200 nm.

4. The method as claimed in claim 1, wherein the step of forming the inorganic oxide layer on the surface of the first substrate comprises evaporation deposition, sputtering deposition, chemical vapor deposition, or physical vapor deposition.

5. The method as claimed in claim 1, wherein the inorganic oxide layer comprises silicon oxide, zirconium oxide, aluminum oxide, tin oxide, titanium oxide, zinc oxide, or combinations thereof.

6. The method as claimed in claim 1, wherein the carbon dispersion comprises carbon nanotube, graphene, graphene oxide, chemically reduced graphene oxide, graphene nanoribbon, or combinations thereof.

7. The method as claimed in claim 1, wherein the carbon dispersion has a carbon material concentration of 0.001 wt % to 2.0 wt %.

8. The method as claimed in claim 1, wherein the step of drying the carbon dispersion is performed at a temperature of 60°

C. to 140°

C. for a period of 30 seconds to 1 hour.

9. The method as claimed in claim 1, wherein the solvent comprises water, ethylene glycol, dimethyl sulfoxide, N,N-dimethylformamide, propylene carbonate, ethanol, isopropanol, 1-propanol, or combinations thereof.

10. The method as claimed in claim 1, wherein the second substrate comprises glass, plastics, synthetic resin, or metal.

11. The method as claimed in claim 10, wherein the synthetic resin comprises polyethyleneterephthalate, polycarbonate, polypropylene, polyethylene, polydimethylsiloxane, polytetrafluoroethylene, polyvinylidene difluoride, polyimide, poly(ethylene 2,6-naphthalate), or polyethersulfone.

12. The method as claimed in claim 1, wherein the second substrate comprises a non-planar substrate.

13. The method as claimed in claim 1, further comprising:

applying an adhesive layer on a surface of the carbon conductive film, wherein the carbon conductive film is disposed between the adhesive layer and the second substrate;

attaching a third substrate to the adhesive layer and then curing the adhesive layer, thereby transferring the carbon conductive film onto the third substrate; and

removing the second substrate.

14. The method as claimed in claim 13, wherein the step of curing the adhesive layer comprises thermal curing, photo curing, moisture curing, or pressure curing.

15. The method as claimed in claim 13, wherein the third substrate comprises a non-planar substrate.