Carbon nanotube composite and method for forming same

Abstract

A method for forming a carbon nanotube composite includes the following steps. A substrate having a surface is provided. A carbon nanotube structure is disposed on the surface of the substrate. The carbon nanotube structure includes a number of carbon nanotubes. The carbon nanotubes define a number of micro gaps. The substrate and the carbon nanotube structure are disposed in an environment filled with electromagnetic waves such that the surface of the substrate is melted and is permeated into the micro gaps.

1 . A method for forming a carbon nanotube composite, comprising:
 providing a substrate having a surface;   disposing a carbon nanotube structure on the surface of the substrate, wherein the carbon nanotube structure comprises a plurality of carbon nanotubes defining a plurality of micro gaps; and   disposing the substrate and the carbon nanotube structure in an environment filled with electromagnetic waves to melt the surface of the substrate such that the melted surface of the substrate is permeated into the plurality of micro gaps.   
     
     
         2 . The method as claimed in  claim 1 , wherein the surface of the substrate is planar or a curved surface. 
     
     
         3 . The method as claimed in  claim 1 , wherein a melting point of the substrate is less than 600° C. 
     
     
         4 . The method as claimed in  claim 1 , wherein a power of the electromagnetic waves is in a range from about 300 watts to about 2000 watts. 
     
     
         5 . The method as claimed in  claim 1 , wherein the electromagnetic waves are microwaves, a power of the microwaves is in a range from about 300 watts to about 1500 watts, and a frequency of the microwaves is in a range from about 1 gigahertz to about 5 gigahertz. 
     
     
         6 . The method as claimed in  claim 5 , wherein the substrate and the carbon nanotube structure are disposed in the environment for about 1 second to about 300 seconds. 
     
     
         7 . The method as claimed in  claim 1 , wherein the step of disposing the carbon nanotube structure on the surface of the substrate further comprises:
 preparing a free-standing carbon nanotube structure; and   laying the free-standing carbon nanotube structure on the surface of the substrate.   
     
     
         8 . The method as claimed in  claim 7 , wherein the step of disposing the carbon nanotube structure on the surface of the substrate further comprises:
 soaking the free-standing carbon nanotube structure with organic solvent; and   drying the free-standing carbon nanotube structure after being soaked with the organic solvent.   
     
     
         9 . The method as claimed in  claim 1 , wherein a gas pressure of the environment is in a range from about 1*10 −2  Pascals to about 1*10 −6  Pascals. 
     
     
         10 . The method as claimed in  claim 1 , wherein an aperture of each of the plurality of micro gaps is equal to or less than 10 micrometers, and the carbon nanotube structure heats the surface of the substrate to melt the surface of the substrate such that the melted surface of the substrate permeates into the plurality of micro gaps. 
     
     
         11 . The method as claimed in  claim 10 , wherein a material of the substrate coats on each of the plurality of carbon nanotubes of the carbon nanotube structure after being melted. 
     
     
         12 . A carbon nanotube composite, comprising:
 a substrate having a surface; and   a carbon nanotube structure disposed in the substrate,   wherein a distance between the surface of the substrate and the carbon nanotube structure is equal to or less than 10 micrometers.   
     
     
         13 . The carbon nanotube composite as claimed in  claim 12 , wherein a material of the substrate is selected from the group consisting of epoxy, bismaleimide resin, cyanate resin, polyethylene, polypropylene, polystyrene, polyvinyl alcohol, polycarbonate, and polymethylmethacrylate. 
     
     
         14 . The carbon nanotube composite as claimed in  claim 12 , wherein a melting point of the substrate is less than 600° C. 
     
     
         15 . The carbon nanotube composite as claimed in  claim 12 , wherein the carbon nanotube structure comprises a plurality of carbon nanotubes defining a plurality of micro gaps. 
     
     
         16 . The carbon nanotube composite as claimed in  claim 15 , wherein the plurality of micro gaps are filled with the substrate. 
     
     
         17 . The carbon nanotube composite as claimed in  claim 15 , wherein the plurality of carbon nanotubes are entangled with each other. 
     
     
         18 . The carbon nanotube composite as claimed in  claim 15 , wherein the plurality of carbon nanotubes are arranged approximately along a same direction. 
     
     
         19 . A carbon nanotube composite, comprising:
 a substrate having a surface; and   a carbon nanotube structure disposed in the substrate,   wherein a material of the substrate is a macromolecular material, and a sheet resistance of the surface of the substrate is equal to or less than 8000 ohms.   
     
     
         20 . The carbon nanotube composite as claimed in  claim 19 , wherein a distance between the surface of the substrate and the carbon nanotube structure is equal to or less than 10 micrometers.