METHOD FOR MAKING COMPOSITE MATERIAL HAVING CARBON NANOTUBE ARRAY

• US 20100065190A1
• Filed: 07/28/2009
• Published: 03/18/2010
• Est. Priority Date: 09/12/2008
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd., Tsinghua University
• Original Assignee: Hon Hai Precision Industry Co., Ltd., Tsinghua University
• Inventors: CHENG, QUN-FENG, WEN, JIA-JIA, FAN, SHOU-SHAN, JIANG, KAI-LI, WANG, JIA-PING
• Granted Patent: US 8,052,825 B2
• Time in Patent Office: Days
• US Class Current: 156/152
• CPC Class Codes: B29C 70/72 Encapsulating inserts having non-encapsulated projections, e.g. extremities or terminal portions of electrical components B29C70/742 takes precedence
• CPC Class Codes: B29K 2105/167 Nanotubes
• CPC Class Codes: B29K 2707/04 Carbon
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C08F 2/44 Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• CPC Class Codes: C08J 5/005 Reinforced macromolecular compounds with nanosized materials, e.g. nanoparticles, nanofibres, nanotubes, nanowires, nanorods or nanolayered materials
• CPC Class Codes: Y10T 156/1052 with cutting, punching, tearing or severing

Abstract

A method for producing a composite material having a carbon nanotube array, includes the steps of: (a) providing the carbon nanotube array, the carbon nanotube array has a first end surface and a second end surface opposite to the first end surface; (b) providing a first board and a second board, fixing the first end surface of the carbon nanotube array on the first board, fixing the second end surface of the carbon nanotube array on the second board; (c) packaging the first board and the second board to form an apparatus having an entrance; (d) providing a liquid polymer precursor, applying the liquid polymer precursor from the entrance to the apparatus until the liquid polymer precursor submerge carbon nanotube array; and (e) solidifying the liquid polymer precursor.

Claims

1. A method for producing a composite material having a carbon nanotube array, the method comprising:

providing the carbon nanotube array having a first end surface and a second end surface opposite to the first end surface;

providing a first board and a second board, and fixing the first end surface of the carbon nanotube array on the first board and the second end surface of the carbon nanotube array on the second board;

packaging the first board and the second board to form an apparatus having an entrance;

applying a liquid polymer precursor through the entrance into the apparatus until the carbon nanotube array is submerged by the liquid polymer precursor; and

solidifying the liquid polymer precursor to obtain the composite material.

2. The method as claimed in claim 1, wherein the method for fixing the carbon nanotube array comprises:

coating a first adhesive layer on the first board, and coating a second adhesive layer on the second board;

attaching the first end surface of the carbon nanotube array to the first board via the first adhesive layer and the second end surface of the carbon nanotube array to the second board via the second adhesive layer;

baking the first adhesive layer and the second adhesive layer to fix the carbon nanotube array between the first board and second board.

3. The method as claimed in claim 2, wherein a thickness of the first adhesive layer or the second adhesive layer ranges from about 0. 1 μ

m to about 10 μ

m.

4. The method as claimed in claim 1, wherein the carbon nanotube array is grown on a substrate, and the second end surface of the carbon nanotube array is contacting the substrate.

5. The method as claimed in claim 4, wherein the second end surface of the carbon nanotube array is attached to the second board via the substrate.

6. The method as claimed in claim 4, further comprising a step of stripping the carbon nanotube array from the substrate, before fixing the second end surface of the carbon nanotube array on the second board.

7. The method as claimed in claim 6, wherein the carbon nanotube array is stripped from the substrate by mechanical planarization or chemical corrosion.

8. The method as claimed in claim 6, wherein the method of stripping the carbon nanotube array from the substrate, comprises:

fixing the substrate on which the carbon nanotube array is formed; and

providing a metal sheet to insert into an interface between the substrate and the second end surface of the carbon nanotube array to separate the carbon nanotube array from the substrate.

9. The method as claimed in claim 1, wherein the step of packaging the first board and the second board comprises providing at least one lateral board to cooperate with the first board and the second board to form a cubical apparatus.

10. The method as claimed in claim 1, wherein the liquid polymer precursor is dropped or injected into the apparatus to infuse the carbon nanotube array.

11. The method as claimed in claim 10, wherein the liquid polymer precursor is dropped or injected into the apparatus along a direction approximately perpendicular to an axial direction of the carbon nanotube array.

12. The method as claimed in claim 1, wherein the liquid polymer precursor is a liquid with a viscosity of less than 1 Pa·

s.

13. The method as claimed in claim 1, wherein the liquid polymer precursor is solidified in a vacuum chamber.

14. The method as claimed in claim 1, wherein the step of solidifying the liquid polymer precursor comprises the following steps:

putting the carbon nanotube array submerged by the liquid polymer precursor into an oven;

heating the carbon nanotube array submerged by the liquid polymer precursor at a temperature ranging from about 80°

C. to about 100°

C. for about 1 hour to about 30 hours; and

heating the carbon nanotube array with the liquid polymer precursor at a temperature ranging from about 120°

C. to about 300°

C. for about 3 hours to about 20 hours.

15. The method as claimed in claim 1, further comprising a step of removing the air from the carbon nanotube array submerged by the liquid polymer precursor by vacuuming the apparatus before the step of solidifying the liquid polymer precursor.

16. The method as claimed in claim 1, further comprising a step of slicing the composite material to expose the carbon nanotube array, after the step of solidifying the liquid polymer precursor.

17. The method as claimed in claim 16, the composite material is sliced along a direction approximately perpendicular to the axis of the carbon nanotubes in the carbon nanotube array by a slicer.

18. A method for producing a composite material comprising a carbon nanotube array, the method comprising:

providing a carbon nanotube array having a first end surface and a second end surface opposite to the first surface;

providing a first board and a second board, fixing the first end surface of the carbon nanotube array on the first board, and fixing the second end surface of the carbon nanotube array on the second board;

packaging the first board and the second board to form a cubical apparatus having an entrance;

applying a liquid polymer precursor through the entrance into the apparatus until the carbon nanotube array is submerged by the liquid polymer precursor;

vacuuming the apparatus; and

solidifying the liquid polymer precursor.

19. The method as claimed in claim 18, wherein a pressure in the apparatus after vacuuming the apparatus is in a range from about 10⁻

4 Pa to about 10<sup>−

6</sup> Pa.

20. The method as claimed in claim 18, wherein the step of solidifying the liquid polymer precursor comprises the following steps:

putting the carbon nanotube array submerged by the liquid polymer precursor into an oven;

heating the carbon nanotube array submerged by the liquid polymer precursor at a temperature ranging from about 80°

C. to about 100°

C. for about 1 hour to about 30 hours; and

heating the carbon nanotube array with the liquid polymer precursor at a temperature ranging from about 120°

C. to about 300°

C. for about 3 hours to about 20 hours.