METHOD FOR MAKING HIGH-DENSITY CARBON NANOTUBE ARRAY

• US 20090028779A1
• Filed: 12/29/2007
• Published: 01/29/2009
• Est. Priority Date: 07/25/2007
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd., Tsinghua University
• Original Assignee: Hon Hai Precision Industry Co., Ltd., Tsinghua University
• Inventors: Liu, Chang-Hong, Fan, Shou-Shan, Wang, Ding, Song, Peng-Cheng
• Granted Patent: US 7,785,669 B2
• Time in Patent Office: Days
• US Class Current: 423/461
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: Y10S 977/745 having a modified surface
• CPC Class Codes: Y10T 428/1328 Shrinkable or shrunk [e.g., due to heat, solvent, volatile agent, restraint removal, etc.]
• CPC Class Codes: Y10T 428/1352 Polymer or resin containing [i.e., natural or synthetic]
• CPC Class Codes: Y10T 428/24132 including grain, strips, or filamentary elements in different layers or components parallel
• CPC Class Codes: Y10T 428/30 Self-sustaining carbon mass or layer with impregnant or other layer

Abstract

A method for making a high-density carbon nanotube array includes the steps of: (a) providing a substrate having a carbon nanotube array formed thereon; (b) providing an elastic film; (c) stretching the elastic film uniformly, and covering the elastic film to the carbon nanotube array; (d) exerting a pressure uniformly on the elastic film, and shrinking the carbon nanotube array and the elastic film under the pressure; and (e) separating the nanotube array from the elastic film to acquire a high-density carbon nanotube array.

Claims

1. A method for making a high-density carbon nanotube array, the method comprising the steps of:

(a) providing a substrate having a carbon nanotube array formed thereon;

(b) providing an elastic film;

(c) stretching the elastic film uniformly, and covering the elastic film on the carbon nanotube array;

(d) applying a pressure uniformly on the elastic film, and shrinking the elastic film and the carbon nanotube array under the pressure; and

(e) separating the carbon nanotube array from the elastic film to acquire a high-density carbon nanotube array.

2. The method as claimed in claim 1, wherein in step (b), the material of the elastic film is silicon rubber, butadiene rubber, natural rubber, isoprene rubber, and styrene-butadiene rubber.

3. The method as claimed in claim 1, wherein in step (c), the elastic film is stretched along one direction or two directions.

4. The method as claimed in claim 3, wherein the elastic film stretched along one direction means stretching the elastic film along a direction of a length or a width of the elastic film.

5. The method as claimed in claim 3, wherein the elastic film stretched along two directions means stretching the elastic film along directions of a length and a width of the elastic film at the same time.

6. The method as claimed in claim 1, wherein in step (c), the stretched elastic film is covered on one end of the carbon nanotube array away from the substrate.

7. The method as claimed in claim 1, wherein in step (d), a direction of the applied pressure is perpendicular to the substrate.

8. The method as claimed in claim 1, wherein in step (d), the carbon nanotube array and the elastic film are shrunk along one direction or two directions.

9. The method as claimed in claim 8, wherein the carbon nanotube array and the elastic film shrunk along one direction means shrinking the carbon nanotube array and the elastic film along a direction of a length or a width of the elastic film.

10. The method as claimed in claim 8, wherein the carbon nanotube array and the elastic film shrunk along two directions means shrinking the carbon nanotube array and the elastic film along directions of a length and a width of the elastic film at the same time.

11. The method as claimed in claim 1, wherein in step (e), the carbon nanotube array is separated from the elastic film by a mechanical means.